Remove parts of //cc we aren't using

cc/trees/layer_tree_host_impl_unittest.cc

-// Copyright 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "cc/trees/layer_tree_host_impl.h"
-
-#include <algorithm>
-#include <cmath>
-
-#include "base/bind.h"
-#include "base/command_line.h"
-#include "base/containers/hash_tables.h"
-#include "base/containers/scoped_ptr_hash_map.h"
-#include "cc/animation/scrollbar_animation_controller_thinning.h"
-#include "cc/base/math_util.h"
-#include "cc/input/page_scale_animation.h"
-#include "cc/input/top_controls_manager.h"
-#include "cc/layers/append_quads_data.h"
-#include "cc/layers/delegated_renderer_layer_impl.h"
-#include "cc/layers/heads_up_display_layer_impl.h"
-#include "cc/layers/io_surface_layer_impl.h"
-#include "cc/layers/layer_impl.h"
-#include "cc/layers/painted_scrollbar_layer_impl.h"
-#include "cc/layers/render_surface_impl.h"
-#include "cc/layers/solid_color_layer_impl.h"
-#include "cc/layers/solid_color_scrollbar_layer_impl.h"
-#include "cc/layers/texture_layer_impl.h"
-#include "cc/layers/tiled_layer_impl.h"
-#include "cc/output/begin_frame_args.h"
-#include "cc/output/compositor_frame_ack.h"
-#include "cc/output/compositor_frame_metadata.h"
-#include "cc/output/copy_output_request.h"
-#include "cc/output/copy_output_result.h"
-#include "cc/output/gl_renderer.h"
-#include "cc/output/latency_info_swap_promise.h"
-#include "cc/quads/render_pass_draw_quad.h"
-#include "cc/quads/solid_color_draw_quad.h"
-#include "cc/quads/texture_draw_quad.h"
-#include "cc/quads/tile_draw_quad.h"
-#include "cc/resources/layer_tiling_data.h"
-#include "cc/test/animation_test_common.h"
-#include "cc/test/begin_frame_args_test.h"
-#include "cc/test/fake_layer_tree_host_impl.h"
-#include "cc/test/fake_output_surface.h"
-#include "cc/test/fake_output_surface_client.h"
-#include "cc/test/fake_picture_layer_impl.h"
-#include "cc/test/fake_picture_pile_impl.h"
-#include "cc/test/fake_proxy.h"
-#include "cc/test/geometry_test_utils.h"
-#include "cc/test/layer_test_common.h"
-#include "cc/test/layer_tree_test.h"
-#include "cc/test/render_pass_test_common.h"
-#include "cc/test/test_gpu_memory_buffer_manager.h"
-#include "cc/test/test_shared_bitmap_manager.h"
-#include "cc/test/test_task_graph_runner.h"
-#include "cc/test/test_web_graphics_context_3d.h"
-#include "cc/trees/layer_tree_impl.h"
-#include "cc/trees/single_thread_proxy.h"
-#include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "third_party/skia/include/core/SkMallocPixelRef.h"
-#include "ui/gfx/frame_time.h"
-#include "ui/gfx/geometry/rect_conversions.h"
-#include "ui/gfx/geometry/size_conversions.h"
-#include "ui/gfx/geometry/vector2d_conversions.h"
-
-using ::testing::Mock;
-using ::testing::Return;
-using ::testing::AnyNumber;
-using ::testing::AtLeast;
-using ::testing::_;
-
-namespace cc {
-namespace {
-
-class LayerTreeHostImplTest : public testing::Test,
-                              public LayerTreeHostImplClient {
- public:
-  LayerTreeHostImplTest()
-      : proxy_(base::MessageLoopProxy::current(),
-               base::MessageLoopProxy::current()),
-        always_impl_thread_(&proxy_),
-        always_main_thread_blocked_(&proxy_),
-        shared_bitmap_manager_(new TestSharedBitmapManager),
-        gpu_memory_buffer_manager_(new TestGpuMemoryBufferManager),
-        task_graph_runner_(new TestTaskGraphRunner),
-        on_can_draw_state_changed_called_(false),
-        did_notify_ready_to_activate_(false),
-        did_request_commit_(false),
-        did_request_redraw_(false),
-        did_request_animate_(false),
-        did_request_prepare_tiles_(false),
-        did_complete_page_scale_animation_(false),
-        reduce_memory_result_(true),
-        current_limit_bytes_(0),
-        current_priority_cutoff_value_(0) {
-  }
-
-  LayerTreeSettings DefaultSettings() {
-    LayerTreeSettings settings;
-    settings.minimum_occlusion_tracking_size = gfx::Size();
-    settings.impl_side_painting = true;
-    settings.renderer_settings.texture_id_allocation_chunk_size = 1;
-    settings.report_overscroll_only_for_scrollable_axes = true;
-    settings.use_pinch_virtual_viewport = true;
-    return settings;
-  }
-
-  void SetUp() override {
-    CreateHostImpl(DefaultSettings(), CreateOutputSurface());
-  }
-
-  void TearDown() override {}
-
-  void UpdateRendererCapabilitiesOnImplThread() override {}
-  void DidLoseOutputSurfaceOnImplThread() override {}
-  void CommitVSyncParameters(base::TimeTicks timebase,
-                             base::TimeDelta interval) override {}
-  void SetEstimatedParentDrawTime(base::TimeDelta draw_time) override {}
-  void SetMaxSwapsPendingOnImplThread(int max) override {}
-  void DidSwapBuffersOnImplThread() override {}
-  void DidSwapBuffersCompleteOnImplThread() override {}
-  void OnCanDrawStateChanged(bool can_draw) override {
-    on_can_draw_state_changed_called_ = true;
-  }
-  void NotifyReadyToActivate() override {
-    did_notify_ready_to_activate_ = true;
-    host_impl_->ActivateSyncTree();
-  }
-  void NotifyReadyToDraw() override {}
-  void SetNeedsRedrawOnImplThread() override { did_request_redraw_ = true; }
-  void SetNeedsRedrawRectOnImplThread(const gfx::Rect& damage_rect) override {
-    did_request_redraw_ = true;
-  }
-  void SetNeedsAnimateOnImplThread() override { did_request_animate_ = true; }
-  void SetNeedsPrepareTilesOnImplThread() override {
-    did_request_prepare_tiles_ = true;
-  }
-  void SetNeedsCommitOnImplThread() override { did_request_commit_ = true; }
-  void PostAnimationEventsToMainThreadOnImplThread(
-      scoped_ptr<AnimationEventsVector> events) override {}
-  bool ReduceContentsTextureMemoryOnImplThread(size_t limit_bytes,
-                                               int priority_cutoff) override {
-    current_limit_bytes_ = limit_bytes;
-    current_priority_cutoff_value_ = priority_cutoff;
-    return reduce_memory_result_;
-  }
-  bool IsInsideDraw() override { return false; }
-  void RenewTreePriority() override {}
-  void PostDelayedAnimationTaskOnImplThread(const base::Closure& task,
-                                            base::TimeDelta delay) override {
-    animation_task_ = task;
-    requested_animation_delay_ = delay;
-  }
-  void DidActivateSyncTree() override {}
-  void DidPrepareTiles() override {}
-  void DidCompletePageScaleAnimationOnImplThread() override {
-    did_complete_page_scale_animation_ = true;
-  }
-
-  void set_reduce_memory_result(bool reduce_memory_result) {
-    reduce_memory_result_ = reduce_memory_result;
-  }
-
-  virtual bool CreateHostImpl(const LayerTreeSettings& settings,
-                              scoped_ptr<OutputSurface> output_surface) {
-    host_impl_ = LayerTreeHostImpl::Create(
-        settings, this, &proxy_, &stats_instrumentation_,
-        shared_bitmap_manager_.get(), gpu_memory_buffer_manager_.get(),
-        task_graph_runner_.get(), 0);
-    bool init = host_impl_->InitializeRenderer(output_surface.Pass());
-    host_impl_->SetViewportSize(gfx::Size(10, 10));
-    return init;
-  }
-
-  void SetupRootLayerImpl(scoped_ptr<LayerImpl> root) {
-    root->SetPosition(gfx::PointF());
-    root->SetBounds(gfx::Size(10, 10));
-    root->SetContentBounds(gfx::Size(10, 10));
-    root->SetDrawsContent(true);
-    root->draw_properties().visible_content_rect = gfx::Rect(0, 0, 10, 10);
-    root->SetHasRenderSurface(true);
-    host_impl_->active_tree()->SetRootLayer(root.Pass());
-  }
-
-  static void ExpectClearedScrollDeltasRecursive(LayerImpl* layer) {
-    ASSERT_EQ(layer->ScrollDelta(), gfx::Vector2d());
-    for (size_t i = 0; i < layer->children().size(); ++i)
-      ExpectClearedScrollDeltasRecursive(layer->children()[i]);
-  }
-
-  static void ExpectContains(const ScrollAndScaleSet& scroll_info,
-                             int id,
-                             const gfx::Vector2d& scroll_delta) {
-    int times_encountered = 0;
-
-    for (size_t i = 0; i < scroll_info.scrolls.size(); ++i) {
-      if (scroll_info.scrolls[i].layer_id != id)
-        continue;
-      EXPECT_VECTOR_EQ(scroll_delta, scroll_info.scrolls[i].scroll_delta);
-      times_encountered++;
-    }
-
-    ASSERT_EQ(1, times_encountered);
-  }
-
-  static void ExpectNone(const ScrollAndScaleSet& scroll_info, int id) {
-    int times_encountered = 0;
-
-    for (size_t i = 0; i < scroll_info.scrolls.size(); ++i) {
-      if (scroll_info.scrolls[i].layer_id != id)
-        continue;
-      times_encountered++;
-    }
-
-    ASSERT_EQ(0, times_encountered);
-  }
-
-  LayerImpl* CreateScrollAndContentsLayers(LayerTreeImpl* layer_tree_impl,
-                                           const gfx::Size& content_size) {
-    const int kInnerViewportScrollLayerId = 2;
-    const int kInnerViewportClipLayerId = 4;
-    const int kPageScaleLayerId = 5;
-    scoped_ptr<LayerImpl> root =
-        LayerImpl::Create(layer_tree_impl, 1);
-    root->SetBounds(content_size);
-    root->SetContentBounds(content_size);
-    root->SetPosition(gfx::PointF());
-    root->SetHasRenderSurface(true);
-
-    scoped_ptr<LayerImpl> scroll =
-        LayerImpl::Create(layer_tree_impl, kInnerViewportScrollLayerId);
-    LayerImpl* scroll_layer = scroll.get();
-    scroll->SetIsContainerForFixedPositionLayers(true);
-    scroll->PushScrollOffsetFromMainThread(gfx::ScrollOffset());
-
-    scoped_ptr<LayerImpl> clip =
-        LayerImpl::Create(layer_tree_impl, kInnerViewportClipLayerId);
-    clip->SetBounds(
-        gfx::Size(content_size.width() / 2, content_size.height() / 2));
-
-    scoped_ptr<LayerImpl> page_scale =
-        LayerImpl::Create(layer_tree_impl, kPageScaleLayerId);
-
-    scroll->SetScrollClipLayer(clip->id());
-    scroll->SetBounds(content_size);
-    scroll->SetContentBounds(content_size);
-    scroll->SetPosition(gfx::PointF());
-    scroll->SetIsContainerForFixedPositionLayers(true);
-
-    scoped_ptr<LayerImpl> contents =
-        LayerImpl::Create(layer_tree_impl, 3);
-    contents->SetDrawsContent(true);
-    contents->SetBounds(content_size);
-    contents->SetContentBounds(content_size);
-    contents->SetPosition(gfx::PointF());
-
-    scroll->AddChild(contents.Pass());
-    page_scale->AddChild(scroll.Pass());
-    clip->AddChild(page_scale.Pass());
-    root->AddChild(clip.Pass());
-
-    layer_tree_impl->SetRootLayer(root.Pass());
-    layer_tree_impl->SetViewportLayersFromIds(
-        Layer::INVALID_ID, kPageScaleLayerId, kInnerViewportScrollLayerId,
-        Layer::INVALID_ID);
-
-    return scroll_layer;
-  }
-
-  LayerImpl* SetupScrollAndContentsLayers(const gfx::Size& content_size) {
-    LayerImpl* scroll_layer = CreateScrollAndContentsLayers(
-        host_impl_->active_tree(), content_size);
-    host_impl_->active_tree()->DidBecomeActive();
-    return scroll_layer;
-  }
-
-  // TODO(wjmaclean) Add clip-layer pointer to parameters.
-  scoped_ptr<LayerImpl> CreateScrollableLayer(int id,
-                                              const gfx::Size& size,
-                                              LayerImpl* clip_layer) {
-    DCHECK(clip_layer);
-    DCHECK(id != clip_layer->id());
-    scoped_ptr<LayerImpl> layer =
-        LayerImpl::Create(host_impl_->active_tree(), id);
-    layer->SetScrollClipLayer(clip_layer->id());
-    layer->SetDrawsContent(true);
-    layer->SetBounds(size);
-    layer->SetContentBounds(size);
-    clip_layer->SetBounds(gfx::Size(size.width() / 2, size.height() / 2));
-    return layer.Pass();
-  }
-
-  void DrawFrame() {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-
-  void pinch_zoom_pan_viewport_forces_commit_redraw(float device_scale_factor);
-  void pinch_zoom_pan_viewport_test(float device_scale_factor);
-  void pinch_zoom_pan_viewport_and_scroll_test(float device_scale_factor);
-  void pinch_zoom_pan_viewport_and_scroll_boundary_test(
-      float device_scale_factor);
-
-  void CheckNotifyCalledIfCanDrawChanged(bool always_draw) {
-    // Note: It is not possible to disable the renderer once it has been set,
-    // so we do not need to test that disabling the renderer notifies us
-    // that can_draw changed.
-    EXPECT_FALSE(host_impl_->CanDraw());
-    on_can_draw_state_changed_called_ = false;
-
-    // Set up the root layer, which allows us to draw.
-    SetupScrollAndContentsLayers(gfx::Size(100, 100));
-    EXPECT_TRUE(host_impl_->CanDraw());
-    EXPECT_TRUE(on_can_draw_state_changed_called_);
-    on_can_draw_state_changed_called_ = false;
-
-    // Toggle the root layer to make sure it toggles can_draw
-    host_impl_->active_tree()->SetRootLayer(nullptr);
-    EXPECT_FALSE(host_impl_->CanDraw());
-    EXPECT_TRUE(on_can_draw_state_changed_called_);
-    on_can_draw_state_changed_called_ = false;
-
-    SetupScrollAndContentsLayers(gfx::Size(100, 100));
-    EXPECT_TRUE(host_impl_->CanDraw());
-    EXPECT_TRUE(on_can_draw_state_changed_called_);
-    on_can_draw_state_changed_called_ = false;
-
-    // Toggle the device viewport size to make sure it toggles can_draw.
-    host_impl_->SetViewportSize(gfx::Size());
-    if (always_draw) {
-      EXPECT_TRUE(host_impl_->CanDraw());
-    } else {
-      EXPECT_FALSE(host_impl_->CanDraw());
-    }
-    EXPECT_TRUE(on_can_draw_state_changed_called_);
-    on_can_draw_state_changed_called_ = false;
-
-    host_impl_->SetViewportSize(gfx::Size(100, 100));
-    EXPECT_TRUE(host_impl_->CanDraw());
-    EXPECT_TRUE(on_can_draw_state_changed_called_);
-    on_can_draw_state_changed_called_ = false;
-
-    // Toggle contents textures purged without causing any evictions,
-    // and make sure that it does not change can_draw.
-    set_reduce_memory_result(false);
-    host_impl_->SetMemoryPolicy(ManagedMemoryPolicy(
-        host_impl_->memory_allocation_limit_bytes() - 1));
-    EXPECT_TRUE(host_impl_->CanDraw());
-    EXPECT_FALSE(on_can_draw_state_changed_called_);
-    on_can_draw_state_changed_called_ = false;
-
-    // Toggle contents textures purged to make sure it toggles can_draw.
-    set_reduce_memory_result(true);
-    host_impl_->SetMemoryPolicy(ManagedMemoryPolicy(
-        host_impl_->memory_allocation_limit_bytes() - 1));
-    if (always_draw) {
-      EXPECT_TRUE(host_impl_->CanDraw());
-    } else {
-      EXPECT_FALSE(host_impl_->CanDraw());
-    }
-    EXPECT_TRUE(on_can_draw_state_changed_called_);
-    on_can_draw_state_changed_called_ = false;
-
-    host_impl_->active_tree()->ResetContentsTexturesPurged();
-    EXPECT_TRUE(host_impl_->CanDraw());
-    EXPECT_TRUE(on_can_draw_state_changed_called_);
-    on_can_draw_state_changed_called_ = false;
-  }
-
-  void SetupMouseMoveAtWithDeviceScale(float device_scale_factor);
-
- protected:
-  virtual scoped_ptr<OutputSurface> CreateOutputSurface() {
-    return FakeOutputSurface::Create3d();
-  }
-
-  void DrawOneFrame() {
-    LayerTreeHostImpl::FrameData frame_data;
-    host_impl_->PrepareToDraw(&frame_data);
-    host_impl_->DidDrawAllLayers(frame_data);
-  }
-
-  FakeProxy proxy_;
-  DebugScopedSetImplThread always_impl_thread_;
-  DebugScopedSetMainThreadBlocked always_main_thread_blocked_;
-
-  scoped_ptr<TestSharedBitmapManager> shared_bitmap_manager_;
-  scoped_ptr<TestGpuMemoryBufferManager> gpu_memory_buffer_manager_;
-  scoped_ptr<TestTaskGraphRunner> task_graph_runner_;
-  scoped_ptr<LayerTreeHostImpl> host_impl_;
-  FakeRenderingStatsInstrumentation stats_instrumentation_;
-  bool on_can_draw_state_changed_called_;
-  bool did_notify_ready_to_activate_;
-  bool did_request_commit_;
-  bool did_request_redraw_;
-  bool did_request_animate_;
-  bool did_request_prepare_tiles_;
-  bool did_complete_page_scale_animation_;
-  bool reduce_memory_result_;
-  base::Closure animation_task_;
-  base::TimeDelta requested_animation_delay_;
-  size_t current_limit_bytes_;
-  int current_priority_cutoff_value_;
-};
-
-TEST_F(LayerTreeHostImplTest, NotifyIfCanDrawChanged) {
-  bool always_draw = false;
-  CheckNotifyCalledIfCanDrawChanged(always_draw);
-}
-
-TEST_F(LayerTreeHostImplTest, CanDrawIncompleteFrames) {
-  CreateHostImpl(DefaultSettings(),
-                 FakeOutputSurface::CreateAlwaysDrawAndSwap3d());
-
-  bool always_draw = true;
-  CheckNotifyCalledIfCanDrawChanged(always_draw);
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollDeltaNoLayers) {
-  ASSERT_FALSE(host_impl_->active_tree()->root_layer());
-
-  scoped_ptr<ScrollAndScaleSet> scroll_info = host_impl_->ProcessScrollDeltas();
-  ASSERT_EQ(scroll_info->scrolls.size(), 0u);
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollDeltaTreeButNoChanges) {
-  {
-    scoped_ptr<LayerImpl> root =
-        LayerImpl::Create(host_impl_->active_tree(), 1);
-    root->AddChild(LayerImpl::Create(host_impl_->active_tree(), 2));
-    root->AddChild(LayerImpl::Create(host_impl_->active_tree(), 3));
-    root->children()[1]->AddChild(
-        LayerImpl::Create(host_impl_->active_tree(), 4));
-    root->children()[1]->AddChild(
-        LayerImpl::Create(host_impl_->active_tree(), 5));
-    root->children()[1]->children()[0]->AddChild(
-        LayerImpl::Create(host_impl_->active_tree(), 6));
-    host_impl_->active_tree()->SetRootLayer(root.Pass());
-  }
-  LayerImpl* root = host_impl_->active_tree()->root_layer();
-
-  ExpectClearedScrollDeltasRecursive(root);
-
-  scoped_ptr<ScrollAndScaleSet> scroll_info;
-
-  scroll_info = host_impl_->ProcessScrollDeltas();
-  ASSERT_EQ(scroll_info->scrolls.size(), 0u);
-  ExpectClearedScrollDeltasRecursive(root);
-
-  scroll_info = host_impl_->ProcessScrollDeltas();
-  ASSERT_EQ(scroll_info->scrolls.size(), 0u);
-  ExpectClearedScrollDeltasRecursive(root);
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollDeltaRepeatedScrolls) {
-  gfx::ScrollOffset scroll_offset(20, 30);
-  gfx::Vector2d scroll_delta(11, -15);
-  {
-    scoped_ptr<LayerImpl> root_clip =
-        LayerImpl::Create(host_impl_->active_tree(), 2);
-    scoped_ptr<LayerImpl> root =
-        LayerImpl::Create(host_impl_->active_tree(), 1);
-    root_clip->SetBounds(gfx::Size(10, 10));
-    LayerImpl* root_layer = root.get();
-    root_clip->AddChild(root.Pass());
-    root_layer->SetBounds(gfx::Size(110, 110));
-    root_layer->SetScrollClipLayer(root_clip->id());
-    root_layer->PushScrollOffsetFromMainThread(scroll_offset);
-    root_layer->ScrollBy(scroll_delta);
-    host_impl_->active_tree()->SetRootLayer(root_clip.Pass());
-  }
-  LayerImpl* root = host_impl_->active_tree()->root_layer()->children()[0];
-
-  scoped_ptr<ScrollAndScaleSet> scroll_info;
-
-  scroll_info = host_impl_->ProcessScrollDeltas();
-  ASSERT_EQ(scroll_info->scrolls.size(), 1u);
-  ExpectContains(*scroll_info, root->id(), scroll_delta);
-
-  gfx::Vector2d scroll_delta2(-5, 27);
-  root->ScrollBy(scroll_delta2);
-  scroll_info = host_impl_->ProcessScrollDeltas();
-  ASSERT_EQ(scroll_info->scrolls.size(), 1u);
-  ExpectContains(*scroll_info, root->id(), scroll_delta + scroll_delta2);
-
-  root->ScrollBy(gfx::Vector2d());
-  scroll_info = host_impl_->ProcessScrollDeltas();
-  ExpectContains(*scroll_info, root->id(), scroll_delta + scroll_delta2);
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollRootCallsCommitAndRedraw) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-  EXPECT_TRUE(host_impl_->IsCurrentlyScrollingLayerAt(gfx::Point(),
-                                                      InputHandler::WHEEL));
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10));
-  EXPECT_TRUE(host_impl_->IsCurrentlyScrollingLayerAt(gfx::Point(0, 10),
-                                                      InputHandler::WHEEL));
-  host_impl_->ScrollEnd();
-  EXPECT_FALSE(host_impl_->IsCurrentlyScrollingLayerAt(gfx::Point(),
-                                                       InputHandler::WHEEL));
-  EXPECT_TRUE(did_request_redraw_);
-  EXPECT_TRUE(did_request_commit_);
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollActiveOnlyAfterScrollMovement) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-  EXPECT_FALSE(host_impl_->IsActivelyScrolling());
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10));
-  EXPECT_TRUE(host_impl_->IsActivelyScrolling());
-  host_impl_->ScrollEnd();
-  EXPECT_FALSE(host_impl_->IsActivelyScrolling());
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollWithoutRootLayer) {
-  // We should not crash when trying to scroll an empty layer tree.
-  EXPECT_EQ(InputHandler::SCROLL_IGNORED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollWithoutRenderer) {
-  scoped_ptr<TestWebGraphicsContext3D> context_owned =
-      TestWebGraphicsContext3D::Create();
-  context_owned->set_context_lost(true);
-
-  // Initialization will fail.
-  EXPECT_FALSE(CreateHostImpl(
-      DefaultSettings(), FakeOutputSurface::Create3d(context_owned.Pass())));
-
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-
-  // We should not crash when trying to scroll after the renderer initialization
-  // fails.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-}
-
-TEST_F(LayerTreeHostImplTest, ReplaceTreeWhileScrolling) {
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-
-  // We should not crash if the tree is replaced while we are scrolling.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-  host_impl_->active_tree()->DetachLayerTree();
-
-  scroll_layer = SetupScrollAndContentsLayers(gfx::Size(100, 100));
-
-  // We should still be scrolling, because the scrolled layer also exists in the
-  // new tree.
-  gfx::Vector2d scroll_delta(0, 10);
-  host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-  host_impl_->ScrollEnd();
-  scoped_ptr<ScrollAndScaleSet> scroll_info = host_impl_->ProcessScrollDeltas();
-  ExpectContains(*scroll_info, scroll_layer->id(), scroll_delta);
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollBlocksOnWheelEventHandlers) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-  LayerImpl* root = host_impl_->active_tree()->root_layer();
-
-  // With registered event handlers, wheel scrolls don't necessarily
-  // have to go to the main thread.
-  root->SetHaveWheelEventHandlers(true);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-  host_impl_->ScrollEnd();
-
-  // But typically the scroll-blocks-on mode will require them to.
-  root->SetScrollBlocksOn(SCROLL_BLOCKS_ON_WHEEL_EVENT |
-                          SCROLL_BLOCKS_ON_START_TOUCH);
-  EXPECT_EQ(InputHandler::SCROLL_ON_MAIN_THREAD,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-
-  // But gesture scrolls can still be handled.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollEnd();
-
-  // And if the handlers go away, wheel scrolls can again be processed
-  // on impl (despite the scroll-blocks-on mode).
-  root->SetHaveWheelEventHandlers(false);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-  host_impl_->ScrollEnd();
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollBlocksOnTouchEventHandlers) {
-  LayerImpl* scroll = SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-  LayerImpl* root = host_impl_->active_tree()->root_layer();
-
-  LayerImpl* child = 0;
-  {
-    scoped_ptr<LayerImpl> child_layer =
-        LayerImpl::Create(host_impl_->active_tree(), 6);
-    child = child_layer.get();
-    child_layer->SetDrawsContent(true);
-    child_layer->SetPosition(gfx::PointF(0, 20));
-    child_layer->SetBounds(gfx::Size(50, 50));
-    child_layer->SetContentBounds(gfx::Size(50, 50));
-    scroll->AddChild(child_layer.Pass());
-  }
-
-  // Touch handler regions determine whether touch events block scroll.
-  root->SetTouchEventHandlerRegion(gfx::Rect(0, 0, 100, 100));
-  EXPECT_FALSE(host_impl_->DoTouchEventsBlockScrollAt(gfx::Point(10, 10)));
-  root->SetScrollBlocksOn(SCROLL_BLOCKS_ON_START_TOUCH |
-                          SCROLL_BLOCKS_ON_WHEEL_EVENT);
-  EXPECT_TRUE(host_impl_->DoTouchEventsBlockScrollAt(gfx::Point(10, 10)));
-
-  // But they don't influence the actual handling of the scroll gestures.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollEnd();
-
-  // It's the union of scroll-blocks-on mode bits across all layers in the
-  // scroll paret chain that matters.
-  EXPECT_TRUE(host_impl_->DoTouchEventsBlockScrollAt(gfx::Point(10, 30)));
-  root->SetScrollBlocksOn(SCROLL_BLOCKS_ON_NONE);
-  EXPECT_FALSE(host_impl_->DoTouchEventsBlockScrollAt(gfx::Point(10, 30)));
-  child->SetScrollBlocksOn(SCROLL_BLOCKS_ON_START_TOUCH);
-  EXPECT_TRUE(host_impl_->DoTouchEventsBlockScrollAt(gfx::Point(10, 30)));
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollBlocksOnScrollEventHandlers) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-  LayerImpl* root = host_impl_->active_tree()->root_layer();
-
-  // With registered scroll handlers, scrolls don't generally have to go
-  // to the main thread.
-  root->SetHaveScrollEventHandlers(true);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-  host_impl_->ScrollEnd();
-
-  // Even the default scroll blocks on mode doesn't require this.
-  root->SetScrollBlocksOn(SCROLL_BLOCKS_ON_WHEEL_EVENT |
-                          SCROLL_BLOCKS_ON_START_TOUCH);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollEnd();
-
-  // But the page can opt in to blocking on scroll event handlers.
-  root->SetScrollBlocksOn(SCROLL_BLOCKS_ON_SCROLL_EVENT);
-  EXPECT_EQ(InputHandler::SCROLL_ON_MAIN_THREAD,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-
-  // GESTURE and WHEEL scrolls behave identically in this regard.
-  EXPECT_EQ(InputHandler::SCROLL_ON_MAIN_THREAD,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-
-  // And if the handlers go away, scrolls can again be processed on impl
-  // (despite the scroll-blocks-on mode).
-  root->SetHaveScrollEventHandlers(false);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollEnd();
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollBlocksOnLayerTopology) {
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-
-  // Create a normal scrollable root layer
-  LayerImpl* root_scroll = SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  LayerImpl* root_child = root_scroll->children()[0];
-  LayerImpl* root = host_impl_->active_tree()->root_layer();
-  DrawFrame();
-
-  // Create two child scrollable layers
-  LayerImpl* child1 = 0;
-  {
-    scoped_ptr<LayerImpl> scrollable_child_clip_1 =
-        LayerImpl::Create(host_impl_->active_tree(), 6);
-    scoped_ptr<LayerImpl> scrollable_child_1 = CreateScrollableLayer(
-        7, gfx::Size(10, 10), scrollable_child_clip_1.get());
-    child1 = scrollable_child_1.get();
-    scrollable_child_1->SetPosition(gfx::Point(5, 5));
-    scrollable_child_1->SetHaveWheelEventHandlers(true);
-    scrollable_child_1->SetHaveScrollEventHandlers(true);
-    scrollable_child_clip_1->AddChild(scrollable_child_1.Pass());
-    root_child->AddChild(scrollable_child_clip_1.Pass());
-  }
-
-  LayerImpl* child2 = 0;
-  {
-    scoped_ptr<LayerImpl> scrollable_child_clip_2 =
-        LayerImpl::Create(host_impl_->active_tree(), 8);
-    scoped_ptr<LayerImpl> scrollable_child_2 = CreateScrollableLayer(
-        9, gfx::Size(10, 10), scrollable_child_clip_2.get());
-    child2 = scrollable_child_2.get();
-    scrollable_child_2->SetPosition(gfx::Point(5, 20));
-    scrollable_child_2->SetHaveWheelEventHandlers(true);
-    scrollable_child_2->SetHaveScrollEventHandlers(true);
-    scrollable_child_clip_2->AddChild(scrollable_child_2.Pass());
-    root_child->AddChild(scrollable_child_clip_2.Pass());
-  }
-
-  // Scroll-blocks-on on a layer affects scrolls that hit that layer.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(10, 10), InputHandler::GESTURE));
-  host_impl_->ScrollEnd();
-  child1->SetScrollBlocksOn(SCROLL_BLOCKS_ON_SCROLL_EVENT);
-  EXPECT_EQ(InputHandler::SCROLL_ON_MAIN_THREAD,
-            host_impl_->ScrollBegin(gfx::Point(10, 10), InputHandler::GESTURE));
-
-  // But not those that hit only other layers.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(10, 25), InputHandler::GESTURE));
-  host_impl_->ScrollEnd();
-
-  // It's the union of bits set across the scroll ancestor chain that matters.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(10, 25), InputHandler::GESTURE));
-  host_impl_->ScrollEnd();
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(10, 25), InputHandler::WHEEL));
-  host_impl_->ScrollEnd();
-  root->SetScrollBlocksOn(SCROLL_BLOCKS_ON_WHEEL_EVENT);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(10, 25), InputHandler::GESTURE));
-  host_impl_->ScrollEnd();
-  EXPECT_EQ(InputHandler::SCROLL_ON_MAIN_THREAD,
-            host_impl_->ScrollBegin(gfx::Point(10, 25), InputHandler::WHEEL));
-  child2->SetScrollBlocksOn(SCROLL_BLOCKS_ON_SCROLL_EVENT);
-  EXPECT_EQ(InputHandler::SCROLL_ON_MAIN_THREAD,
-            host_impl_->ScrollBegin(gfx::Point(10, 25), InputHandler::WHEEL));
-  EXPECT_EQ(InputHandler::SCROLL_ON_MAIN_THREAD,
-            host_impl_->ScrollBegin(gfx::Point(10, 25), InputHandler::GESTURE));
-}
-
-TEST_F(LayerTreeHostImplTest, FlingOnlyWhenScrollingTouchscreen) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-
-  // Ignore the fling since no layer is being scrolled
-  EXPECT_EQ(InputHandler::SCROLL_IGNORED, host_impl_->FlingScrollBegin());
-
-  // Start scrolling a layer
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-
-  // Now the fling should go ahead since we've started scrolling a layer
-  EXPECT_EQ(InputHandler::SCROLL_STARTED, host_impl_->FlingScrollBegin());
-}
-
-TEST_F(LayerTreeHostImplTest, FlingOnlyWhenScrollingTouchpad) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-
-  // Ignore the fling since no layer is being scrolled
-  EXPECT_EQ(InputHandler::SCROLL_IGNORED, host_impl_->FlingScrollBegin());
-
-  // Start scrolling a layer
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-
-  // Now the fling should go ahead since we've started scrolling a layer
-  EXPECT_EQ(InputHandler::SCROLL_STARTED, host_impl_->FlingScrollBegin());
-}
-
-TEST_F(LayerTreeHostImplTest, NoFlingWhenScrollingOnMain) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-  LayerImpl* root = host_impl_->active_tree()->root_layer();
-
-  root->SetShouldScrollOnMainThread(true);
-
-  // Start scrolling a layer
-  EXPECT_EQ(InputHandler::SCROLL_ON_MAIN_THREAD,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-
-  // The fling should be ignored since there's no layer being scrolled impl-side
-  EXPECT_EQ(InputHandler::SCROLL_IGNORED, host_impl_->FlingScrollBegin());
-}
-
-TEST_F(LayerTreeHostImplTest, ShouldScrollOnMainThread) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-  LayerImpl* root = host_impl_->active_tree()->root_layer();
-
-  root->SetShouldScrollOnMainThread(true);
-
-  EXPECT_EQ(InputHandler::SCROLL_ON_MAIN_THREAD,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-  EXPECT_EQ(InputHandler::SCROLL_ON_MAIN_THREAD,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-}
-
-TEST_F(LayerTreeHostImplTest, NonFastScrollableRegionBasic) {
-  SetupScrollAndContentsLayers(gfx::Size(200, 200));
-  host_impl_->SetViewportSize(gfx::Size(100, 100));
-
-  LayerImpl* root = host_impl_->active_tree()->root_layer();
-  root->SetContentsScale(2.f, 2.f);
-  root->SetNonFastScrollableRegion(gfx::Rect(0, 0, 50, 50));
-
-  DrawFrame();
-
-  // All scroll types inside the non-fast scrollable region should fail.
-  EXPECT_EQ(InputHandler::SCROLL_ON_MAIN_THREAD,
-            host_impl_->ScrollBegin(gfx::Point(25, 25), InputHandler::WHEEL));
-  EXPECT_FALSE(host_impl_->IsCurrentlyScrollingLayerAt(gfx::Point(25, 25),
-                                                       InputHandler::WHEEL));
-  EXPECT_EQ(InputHandler::SCROLL_ON_MAIN_THREAD,
-            host_impl_->ScrollBegin(gfx::Point(25, 25), InputHandler::GESTURE));
-  EXPECT_FALSE(host_impl_->IsCurrentlyScrollingLayerAt(gfx::Point(25, 25),
-                                                       InputHandler::GESTURE));
-
-  // All scroll types outside this region should succeed.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(75, 75), InputHandler::WHEEL));
-  EXPECT_TRUE(host_impl_->IsCurrentlyScrollingLayerAt(gfx::Point(75, 75),
-                                                      InputHandler::GESTURE));
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10));
-  EXPECT_FALSE(host_impl_->IsCurrentlyScrollingLayerAt(gfx::Point(25, 25),
-                                                       InputHandler::GESTURE));
-  host_impl_->ScrollEnd();
-  EXPECT_FALSE(host_impl_->IsCurrentlyScrollingLayerAt(gfx::Point(75, 75),
-                                                       InputHandler::GESTURE));
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(75, 75), InputHandler::GESTURE));
-  EXPECT_TRUE(host_impl_->IsCurrentlyScrollingLayerAt(gfx::Point(75, 75),
-                                                      InputHandler::GESTURE));
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10));
-  host_impl_->ScrollEnd();
-  EXPECT_FALSE(host_impl_->IsCurrentlyScrollingLayerAt(gfx::Point(75, 75),
-                                                       InputHandler::GESTURE));
-}
-
-TEST_F(LayerTreeHostImplTest, NonFastScrollableRegionWithOffset) {
-  SetupScrollAndContentsLayers(gfx::Size(200, 200));
-  host_impl_->SetViewportSize(gfx::Size(100, 100));
-
-  LayerImpl* root = host_impl_->active_tree()->root_layer();
-  root->SetContentsScale(2.f, 2.f);
-  root->SetNonFastScrollableRegion(gfx::Rect(0, 0, 50, 50));
-  root->SetPosition(gfx::PointF(-25.f, 0.f));
-
-  DrawFrame();
-
-  // This point would fall into the non-fast scrollable region except that we've
-  // moved the layer down by 25 pixels.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(40, 10), InputHandler::WHEEL));
-  EXPECT_TRUE(host_impl_->IsCurrentlyScrollingLayerAt(gfx::Point(40, 10),
-                                                      InputHandler::WHEEL));
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 1));
-  host_impl_->ScrollEnd();
-
-  // This point is still inside the non-fast region.
-  EXPECT_EQ(InputHandler::SCROLL_ON_MAIN_THREAD,
-            host_impl_->ScrollBegin(gfx::Point(10, 10), InputHandler::WHEEL));
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollHandlerNotPresent) {
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(200, 200));
-  EXPECT_FALSE(scroll_layer->have_scroll_event_handlers());
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-
-  EXPECT_FALSE(host_impl_->scroll_affects_scroll_handler());
-  host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE);
-  EXPECT_FALSE(host_impl_->scroll_affects_scroll_handler());
-  host_impl_->ScrollEnd();
-  EXPECT_FALSE(host_impl_->scroll_affects_scroll_handler());
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollHandlerPresent) {
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(200, 200));
-  scroll_layer->SetHaveScrollEventHandlers(true);
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-
-  EXPECT_FALSE(host_impl_->scroll_affects_scroll_handler());
-  host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE);
-  EXPECT_TRUE(host_impl_->scroll_affects_scroll_handler());
-  host_impl_->ScrollEnd();
-  EXPECT_FALSE(host_impl_->scroll_affects_scroll_handler());
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollByReturnsCorrectValue) {
-  SetupScrollAndContentsLayers(gfx::Size(200, 200));
-  host_impl_->SetViewportSize(gfx::Size(100, 100));
-
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-
-  // Trying to scroll to the left/top will not succeed.
-  EXPECT_FALSE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(-10, 0)).did_scroll);
-  EXPECT_FALSE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, -10)).did_scroll);
-  EXPECT_FALSE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(-10, -10)).did_scroll);
-
-  // Scrolling to the right/bottom will succeed.
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(10, 0)).did_scroll);
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10)).did_scroll);
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(10, 10)).did_scroll);
-
-  // Scrolling to left/top will now succeed.
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(-10, 0)).did_scroll);
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, -10)).did_scroll);
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(-10, -10)).did_scroll);
-
-  // Scrolling diagonally against an edge will succeed.
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(10, -10)).did_scroll);
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(-10, 0)).did_scroll);
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(-10, 10)).did_scroll);
-
-  // Trying to scroll more than the available space will also succeed.
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(5000, 5000)).did_scroll);
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollVerticallyByPageReturnsCorrectValue) {
-  SetupScrollAndContentsLayers(gfx::Size(200, 2000));
-  host_impl_->SetViewportSize(gfx::Size(100, 1000));
-
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-
-  // Trying to scroll without a vertical scrollbar will fail.
-  EXPECT_FALSE(host_impl_->ScrollVerticallyByPage(
-      gfx::Point(), SCROLL_FORWARD));
-  EXPECT_FALSE(host_impl_->ScrollVerticallyByPage(
-      gfx::Point(), SCROLL_BACKWARD));
-
-  scoped_ptr<PaintedScrollbarLayerImpl> vertical_scrollbar(
-      PaintedScrollbarLayerImpl::Create(
-          host_impl_->active_tree(),
-          20,
-          VERTICAL));
-  vertical_scrollbar->SetBounds(gfx::Size(15, 1000));
-  host_impl_->InnerViewportScrollLayer()->AddScrollbar(
-      vertical_scrollbar.get());
-
-  // Trying to scroll with a vertical scrollbar will succeed.
-  EXPECT_TRUE(host_impl_->ScrollVerticallyByPage(
-      gfx::Point(), SCROLL_FORWARD));
-  EXPECT_FLOAT_EQ(875.f,
-                  host_impl_->InnerViewportScrollLayer()->ScrollDelta().y());
-  EXPECT_TRUE(host_impl_->ScrollVerticallyByPage(
-      gfx::Point(), SCROLL_BACKWARD));
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollWithUserUnscrollableLayers) {
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(200, 200));
-  host_impl_->SetViewportSize(gfx::Size(100, 100));
-
-  gfx::Size overflow_size(400, 400);
-  ASSERT_EQ(1u, scroll_layer->children().size());
-  LayerImpl* overflow = scroll_layer->children()[0];
-  overflow->SetBounds(overflow_size);
-  overflow->SetContentBounds(overflow_size);
-  overflow->SetScrollClipLayer(scroll_layer->parent()->id());
-  overflow->PushScrollOffsetFromMainThread(gfx::ScrollOffset());
-  overflow->SetPosition(gfx::PointF());
-
-  DrawFrame();
-  gfx::Point scroll_position(10, 10);
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(scroll_position, InputHandler::WHEEL));
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(), scroll_layer->CurrentScrollOffset());
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(), overflow->CurrentScrollOffset());
-
-  gfx::Vector2dF scroll_delta(10, 10);
-  host_impl_->ScrollBy(scroll_position, scroll_delta);
-  host_impl_->ScrollEnd();
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(), scroll_layer->CurrentScrollOffset());
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(10, 10), overflow->CurrentScrollOffset());
-
-  overflow->set_user_scrollable_horizontal(false);
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(scroll_position, InputHandler::WHEEL));
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(), scroll_layer->CurrentScrollOffset());
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(10, 10), overflow->CurrentScrollOffset());
-
-  host_impl_->ScrollBy(scroll_position, scroll_delta);
-  host_impl_->ScrollEnd();
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(10, 0), scroll_layer->CurrentScrollOffset());
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(10, 20), overflow->CurrentScrollOffset());
-
-  overflow->set_user_scrollable_vertical(false);
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(scroll_position, InputHandler::WHEEL));
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(10, 0), scroll_layer->CurrentScrollOffset());
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(10, 20), overflow->CurrentScrollOffset());
-
-  host_impl_->ScrollBy(scroll_position, scroll_delta);
-  host_impl_->ScrollEnd();
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(20, 10), scroll_layer->CurrentScrollOffset());
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(10, 20), overflow->CurrentScrollOffset());
-}
-
-TEST_F(LayerTreeHostImplTest, ImplPinchZoom) {
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-
-  EXPECT_EQ(scroll_layer, host_impl_->InnerViewportScrollLayer());
-  LayerImpl* container_layer = scroll_layer->scroll_clip_layer();
-  EXPECT_EQ(gfx::Size(50, 50), container_layer->bounds());
-
-  float min_page_scale = 1.f, max_page_scale = 4.f;
-  float page_scale_factor = 1.f;
-
-  // The impl-based pinch zoom should adjust the max scroll position.
-  {
-    host_impl_->active_tree()->PushPageScaleFromMainThread(
-        page_scale_factor, min_page_scale, max_page_scale);
-    host_impl_->SetPageScaleOnActiveTree(page_scale_factor);
-    scroll_layer->SetScrollDelta(gfx::Vector2d());
-
-    float page_scale_delta = 2.f;
-
-    host_impl_->ScrollBegin(gfx::Point(50, 50), InputHandler::GESTURE);
-    host_impl_->PinchGestureBegin();
-    host_impl_->PinchGestureUpdate(page_scale_delta, gfx::Point(50, 50));
-    host_impl_->PinchGestureEnd();
-    host_impl_->ScrollEnd();
-    EXPECT_FALSE(did_request_animate_);
-    EXPECT_TRUE(did_request_redraw_);
-    EXPECT_TRUE(did_request_commit_);
-    EXPECT_EQ(gfx::Size(50, 50), container_layer->bounds());
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-    EXPECT_EQ(scroll_info->page_scale_delta, page_scale_delta);
-
-    EXPECT_EQ(gfx::ScrollOffset(75.0, 75.0).ToString(),
-              scroll_layer->MaxScrollOffset().ToString());
-  }
-
-  // Scrolling after a pinch gesture should always be in local space.  The
-  // scroll deltas have the page scale factor applied.
-  {
-    host_impl_->active_tree()->PushPageScaleFromMainThread(
-        page_scale_factor, min_page_scale, max_page_scale);
-    host_impl_->SetPageScaleOnActiveTree(page_scale_factor);
-    scroll_layer->SetScrollDelta(gfx::Vector2d());
-
-    float page_scale_delta = 2.f;
-    host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE);
-    host_impl_->PinchGestureBegin();
-    host_impl_->PinchGestureUpdate(page_scale_delta, gfx::Point());
-    host_impl_->PinchGestureEnd();
-    host_impl_->ScrollEnd();
-
-    gfx::Vector2d scroll_delta(0, 10);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(5, 5), InputHandler::WHEEL));
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    host_impl_->ScrollEnd();
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-    ExpectContains(*scroll_info.get(), scroll_layer->id(),
-                   gfx::Vector2d(0, scroll_delta.y() / page_scale_delta));
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollWithSwapPromises) {
-  ui::LatencyInfo latency_info;
-  latency_info.trace_id = 1234;
-  scoped_ptr<SwapPromise> swap_promise(
-      new LatencyInfoSwapPromise(latency_info));
-
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10));
-  host_impl_->QueueSwapPromiseForMainThreadScrollUpdate(swap_promise.Pass());
-  host_impl_->ScrollEnd();
-
-  scoped_ptr<ScrollAndScaleSet> scroll_info = host_impl_->ProcessScrollDeltas();
-  EXPECT_EQ(1u, scroll_info->swap_promises.size());
-  EXPECT_EQ(latency_info.trace_id, scroll_info->swap_promises[0]->TraceId());
-}
-
-TEST_F(LayerTreeHostImplTest, PinchGesture) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-
-  LayerImpl* scroll_layer = host_impl_->InnerViewportScrollLayer();
-  DCHECK(scroll_layer);
-
-  float min_page_scale = 1.f;
-  float max_page_scale = 4.f;
-
-  // Basic pinch zoom in gesture
-  {
-    host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, min_page_scale,
-                                                           max_page_scale);
-    scroll_layer->SetScrollDelta(gfx::Vector2d());
-
-    float page_scale_delta = 2.f;
-    host_impl_->ScrollBegin(gfx::Point(50, 50), InputHandler::GESTURE);
-    host_impl_->PinchGestureBegin();
-    host_impl_->PinchGestureUpdate(page_scale_delta, gfx::Point(50, 50));
-    host_impl_->PinchGestureEnd();
-    host_impl_->ScrollEnd();
-    EXPECT_FALSE(did_request_animate_);
-    EXPECT_TRUE(did_request_redraw_);
-    EXPECT_TRUE(did_request_commit_);
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-    EXPECT_EQ(scroll_info->page_scale_delta, page_scale_delta);
-  }
-
-  // Zoom-in clamping
-  {
-    host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, min_page_scale,
-                                                           max_page_scale);
-    scroll_layer->SetScrollDelta(gfx::Vector2d());
-    float page_scale_delta = 10.f;
-
-    host_impl_->ScrollBegin(gfx::Point(50, 50), InputHandler::GESTURE);
-    host_impl_->PinchGestureBegin();
-    host_impl_->PinchGestureUpdate(page_scale_delta, gfx::Point(50, 50));
-    host_impl_->PinchGestureEnd();
-    host_impl_->ScrollEnd();
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-    EXPECT_EQ(scroll_info->page_scale_delta, max_page_scale);
-  }
-
-  // Zoom-out clamping
-  {
-    host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, min_page_scale,
-                                                           max_page_scale);
-    scroll_layer->SetScrollDelta(gfx::Vector2d());
-    scroll_layer->PullDeltaForMainThread();
-    scroll_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(50, 50));
-
-    float page_scale_delta = 0.1f;
-    host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE);
-    host_impl_->PinchGestureBegin();
-    host_impl_->PinchGestureUpdate(page_scale_delta, gfx::Point());
-    host_impl_->PinchGestureEnd();
-    host_impl_->ScrollEnd();
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-    EXPECT_EQ(scroll_info->page_scale_delta, min_page_scale);
-
-    EXPECT_TRUE(scroll_info->scrolls.empty());
-  }
-
-  // Two-finger panning should not happen based on pinch events only
-  {
-    host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, min_page_scale,
-                                                           max_page_scale);
-    scroll_layer->SetScrollDelta(gfx::Vector2d());
-    scroll_layer->PullDeltaForMainThread();
-    scroll_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(20, 20));
-
-    float page_scale_delta = 1.f;
-    host_impl_->ScrollBegin(gfx::Point(10, 10), InputHandler::GESTURE);
-    host_impl_->PinchGestureBegin();
-    host_impl_->PinchGestureUpdate(page_scale_delta, gfx::Point(10, 10));
-    host_impl_->PinchGestureUpdate(page_scale_delta, gfx::Point(20, 20));
-    host_impl_->PinchGestureEnd();
-    host_impl_->ScrollEnd();
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-    EXPECT_EQ(scroll_info->page_scale_delta, page_scale_delta);
-    EXPECT_TRUE(scroll_info->scrolls.empty());
-  }
-
-  // Two-finger panning should work with interleaved scroll events
-  {
-    host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, min_page_scale,
-                                                           max_page_scale);
-    scroll_layer->SetScrollDelta(gfx::Vector2d());
-    scroll_layer->PullDeltaForMainThread();
-    scroll_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(20, 20));
-
-    float page_scale_delta = 1.f;
-    host_impl_->ScrollBegin(gfx::Point(10, 10), InputHandler::GESTURE);
-    host_impl_->PinchGestureBegin();
-    host_impl_->PinchGestureUpdate(page_scale_delta, gfx::Point(10, 10));
-    host_impl_->ScrollBy(gfx::Point(10, 10), gfx::Vector2d(-10, -10));
-    host_impl_->PinchGestureUpdate(page_scale_delta, gfx::Point(20, 20));
-    host_impl_->PinchGestureEnd();
-    host_impl_->ScrollEnd();
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-    EXPECT_EQ(scroll_info->page_scale_delta, page_scale_delta);
-    ExpectContains(*scroll_info, scroll_layer->id(), gfx::Vector2d(-10, -10));
-  }
-
-  // Two-finger panning should work when starting fully zoomed out.
-  {
-    host_impl_->active_tree()->PushPageScaleFromMainThread(0.5f, 0.5f, 4.f);
-    scroll_layer->SetScrollDelta(gfx::Vector2d());
-    scroll_layer->PullDeltaForMainThread();
-    scroll_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(0, 0));
-
-    host_impl_->ScrollBegin(gfx::Point(0, 0), InputHandler::GESTURE);
-    host_impl_->PinchGestureBegin();
-    host_impl_->PinchGestureUpdate(2.f, gfx::Point(0, 0));
-    host_impl_->PinchGestureUpdate(1.f, gfx::Point(0, 0));
-    host_impl_->ScrollBy(gfx::Point(0, 0), gfx::Vector2d(10, 10));
-    host_impl_->PinchGestureUpdate(1.f, gfx::Point(10, 10));
-    host_impl_->PinchGestureEnd();
-    host_impl_->ScrollEnd();
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-    EXPECT_EQ(scroll_info->page_scale_delta, 2.f);
-    ExpectContains(*scroll_info, scroll_layer->id(), gfx::Vector2d(20, 20));
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, PageScaleAnimation) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-
-  LayerImpl* scroll_layer = host_impl_->InnerViewportScrollLayer();
-  DCHECK(scroll_layer);
-
-  float min_page_scale = 0.5f;
-  float max_page_scale = 4.f;
-  base::TimeTicks start_time = base::TimeTicks() +
-                               base::TimeDelta::FromSeconds(1);
-  base::TimeDelta duration = base::TimeDelta::FromMilliseconds(100);
-  base::TimeTicks halfway_through_animation = start_time + duration / 2;
-  base::TimeTicks end_time = start_time + duration;
-
-  // Non-anchor zoom-in
-  {
-    host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, min_page_scale,
-                                                           max_page_scale);
-    scroll_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(50, 50));
-
-    did_request_redraw_ = false;
-    did_request_animate_ = false;
-    host_impl_->active_tree()->SetPendingPageScaleAnimation(
-        scoped_ptr<PendingPageScaleAnimation>(new PendingPageScaleAnimation(
-            gfx::Vector2d(),
-            false,
-            2.f,
-            duration)));
-    host_impl_->ActivateSyncTree();
-    EXPECT_FALSE(did_request_redraw_);
-    EXPECT_TRUE(did_request_animate_);
-
-    did_request_redraw_ = false;
-    did_request_animate_ = false;
-    host_impl_->Animate(start_time);
-    EXPECT_TRUE(did_request_redraw_);
-    EXPECT_TRUE(did_request_animate_);
-
-    did_request_redraw_ = false;
-    did_request_animate_ = false;
-    host_impl_->Animate(halfway_through_animation);
-    EXPECT_TRUE(did_request_redraw_);
-    EXPECT_TRUE(did_request_animate_);
-
-    did_request_redraw_ = false;
-    did_request_animate_ = false;
-    did_request_commit_ = false;
-    host_impl_->Animate(end_time);
-    EXPECT_TRUE(did_request_commit_);
-    EXPECT_FALSE(did_request_animate_);
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-    EXPECT_EQ(scroll_info->page_scale_delta, 2);
-    ExpectContains(*scroll_info, scroll_layer->id(), gfx::Vector2d(-50, -50));
-  }
-
-  // Anchor zoom-out
-  {
-    host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, min_page_scale,
-                                                           max_page_scale);
-    scroll_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(50, 50));
-
-    did_request_redraw_ = false;
-    did_request_animate_ = false;
-    host_impl_->active_tree()->SetPendingPageScaleAnimation(
-        scoped_ptr<PendingPageScaleAnimation> (new PendingPageScaleAnimation(
-            gfx::Vector2d(25, 25),
-            true,
-            min_page_scale,
-            duration)));
-    host_impl_->ActivateSyncTree();
-    EXPECT_FALSE(did_request_redraw_);
-    EXPECT_TRUE(did_request_animate_);
-
-    did_request_redraw_ = false;
-    did_request_animate_ = false;
-    host_impl_->Animate(start_time);
-    EXPECT_TRUE(did_request_redraw_);
-    EXPECT_TRUE(did_request_animate_);
-
-    did_request_redraw_ = false;
-    did_request_commit_ = false;
-    did_request_animate_ = false;
-    host_impl_->Animate(end_time);
-    EXPECT_TRUE(did_request_redraw_);
-    EXPECT_FALSE(did_request_animate_);
-    EXPECT_TRUE(did_request_commit_);
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-    EXPECT_EQ(scroll_info->page_scale_delta, min_page_scale);
-    // Pushed to (0,0) via clamping against contents layer size.
-    ExpectContains(*scroll_info, scroll_layer->id(), gfx::Vector2d(-50, -50));
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, PageScaleAnimationNoOp) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-
-  LayerImpl* scroll_layer = host_impl_->InnerViewportScrollLayer();
-  DCHECK(scroll_layer);
-
-  float min_page_scale = 0.5f;
-  float max_page_scale = 4.f;
-  base::TimeTicks start_time = base::TimeTicks() +
-                               base::TimeDelta::FromSeconds(1);
-  base::TimeDelta duration = base::TimeDelta::FromMilliseconds(100);
-  base::TimeTicks halfway_through_animation = start_time + duration / 2;
-  base::TimeTicks end_time = start_time + duration;
-
-  // Anchor zoom with unchanged page scale should not change scroll or scale.
-  {
-    host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, min_page_scale,
-                                                           max_page_scale);
-    scroll_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(50, 50));
-
-    host_impl_->active_tree()->SetPendingPageScaleAnimation(
-        scoped_ptr<PendingPageScaleAnimation>(new PendingPageScaleAnimation(
-            gfx::Vector2d(),
-            true,
-            1.f,
-            duration)));
-    host_impl_->ActivateSyncTree();
-    host_impl_->Animate(start_time);
-    host_impl_->Animate(halfway_through_animation);
-    EXPECT_TRUE(did_request_redraw_);
-    host_impl_->Animate(end_time);
-    EXPECT_TRUE(did_request_commit_);
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-    EXPECT_EQ(scroll_info->page_scale_delta, 1);
-    ExpectNone(*scroll_info, scroll_layer->id());
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, PageScaleAnimationTransferedOnSyncTreeActivate) {
-  host_impl_->CreatePendingTree();
-  CreateScrollAndContentsLayers(
-      host_impl_->pending_tree(),
-      gfx::Size(100, 100));
-  host_impl_->ActivateSyncTree();
-  DrawFrame();
-
-  LayerImpl* scroll_layer = host_impl_->InnerViewportScrollLayer();
-  DCHECK(scroll_layer);
-
-  float min_page_scale = 0.5f;
-  float max_page_scale = 4.f;
-  host_impl_->sync_tree()->PushPageScaleFromMainThread(1.f, min_page_scale,
-                                                       max_page_scale);
-  host_impl_->ActivateSyncTree();
-
-  base::TimeTicks start_time = base::TimeTicks() +
-                               base::TimeDelta::FromSeconds(1);
-  base::TimeDelta duration = base::TimeDelta::FromMilliseconds(100);
-  base::TimeTicks third_through_animation = start_time + duration / 3;
-  base::TimeTicks halfway_through_animation = start_time + duration / 2;
-  base::TimeTicks end_time = start_time + duration;
-  float target_scale = 2.f;
-
-  scroll_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(50, 50));
-
-  // Make sure TakePageScaleAnimation works properly.
-
-  host_impl_->sync_tree()->SetPendingPageScaleAnimation(
-      scoped_ptr<PendingPageScaleAnimation>(new PendingPageScaleAnimation(
-          gfx::Vector2d(),
-          false,
-          target_scale,
-          duration)));
-  scoped_ptr<PendingPageScaleAnimation> psa =
-      host_impl_->sync_tree()->TakePendingPageScaleAnimation();
-  EXPECT_EQ(target_scale, psa->scale);
-  EXPECT_EQ(duration, psa->duration);
-  EXPECT_EQ(nullptr, host_impl_->sync_tree()->TakePendingPageScaleAnimation());
-
-  // Recreate the PSA. Nothing should happen here since the tree containing the
-  // PSA hasn't been activated yet.
-  did_request_redraw_ = false;
-  did_request_animate_ = false;
-  host_impl_->sync_tree()->SetPendingPageScaleAnimation(
-      scoped_ptr<PendingPageScaleAnimation>(new PendingPageScaleAnimation(
-          gfx::Vector2d(),
-          false,
-          target_scale,
-          duration)));
-  host_impl_->Animate(halfway_through_animation);
-  EXPECT_FALSE(did_request_animate_);
-  EXPECT_FALSE(did_request_redraw_);
-
-  // Activate the sync tree. This should cause the animation to become enabled.
-  // It should also clear the pointer on the sync tree.
-  host_impl_->ActivateSyncTree();
-  EXPECT_EQ(nullptr,
-      host_impl_->sync_tree()->TakePendingPageScaleAnimation().get());
-  EXPECT_FALSE(did_request_redraw_);
-  EXPECT_TRUE(did_request_animate_);
-
-  // From here on, make sure the animation runs as normal.
-  did_request_redraw_ = false;
-  did_request_animate_ = false;
-  host_impl_->Animate(start_time);
-  EXPECT_TRUE(did_request_redraw_);
-  EXPECT_TRUE(did_request_animate_);
-
-  did_request_redraw_ = false;
-  did_request_animate_ = false;
-  host_impl_->Animate(third_through_animation);
-  EXPECT_TRUE(did_request_redraw_);
-  EXPECT_TRUE(did_request_animate_);
-
-  // Another activation shouldn't have any effect on the animation.
-  host_impl_->ActivateSyncTree();
-
-  did_request_redraw_ = false;
-  did_request_animate_ = false;
-  host_impl_->Animate(halfway_through_animation);
-  EXPECT_TRUE(did_request_redraw_);
-  EXPECT_TRUE(did_request_animate_);
-
-  did_request_redraw_ = false;
-  did_request_animate_ = false;
-  did_request_commit_ = false;
-  host_impl_->Animate(end_time);
-  EXPECT_TRUE(did_request_commit_);
-  EXPECT_FALSE(did_request_animate_);
-
-  scoped_ptr<ScrollAndScaleSet> scroll_info =
-      host_impl_->ProcessScrollDeltas();
-  EXPECT_EQ(scroll_info->page_scale_delta, target_scale);
-  ExpectContains(*scroll_info, scroll_layer->id(), gfx::Vector2d(-50, -50));
-}
-
-TEST_F(LayerTreeHostImplTest, PageScaleAnimationCompletedNotification) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-
-  LayerImpl* scroll_layer = host_impl_->InnerViewportScrollLayer();
-  DCHECK(scroll_layer);
-
-  base::TimeTicks start_time =
-      base::TimeTicks() + base::TimeDelta::FromSeconds(1);
-  base::TimeDelta duration = base::TimeDelta::FromMilliseconds(100);
-  base::TimeTicks halfway_through_animation = start_time + duration / 2;
-  base::TimeTicks end_time = start_time + duration;
-
-  host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, 0.5f, 4.f);
-  scroll_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(50, 50));
-
-  did_complete_page_scale_animation_ = false;
-  host_impl_->active_tree()->SetPendingPageScaleAnimation(
-      scoped_ptr<PendingPageScaleAnimation>(new PendingPageScaleAnimation(
-          gfx::Vector2d(), false, 2.f, duration)));
-  host_impl_->ActivateSyncTree();
-  host_impl_->Animate(start_time);
-  EXPECT_FALSE(did_complete_page_scale_animation_);
-
-  host_impl_->Animate(halfway_through_animation);
-  EXPECT_FALSE(did_complete_page_scale_animation_);
-
-  host_impl_->Animate(end_time);
-  EXPECT_TRUE(did_complete_page_scale_animation_);
-}
-
-class LayerTreeHostImplOverridePhysicalTime : public LayerTreeHostImpl {
- public:
-  LayerTreeHostImplOverridePhysicalTime(
-      const LayerTreeSettings& settings,
-      LayerTreeHostImplClient* client,
-      Proxy* proxy,
-      SharedBitmapManager* manager,
-      RenderingStatsInstrumentation* rendering_stats_instrumentation)
-      : LayerTreeHostImpl(settings,
-                          client,
-                          proxy,
-                          rendering_stats_instrumentation,
-                          manager,
-                          NULL,
-                          NULL,
-                          0) {}
-
-  BeginFrameArgs CurrentBeginFrameArgs() const override {
-    return CreateBeginFrameArgsForTesting(BEGINFRAME_FROM_HERE,
-                                          fake_current_physical_time_);
-  }
-
-  void SetCurrentPhysicalTimeTicksForTest(base::TimeTicks fake_now) {
-    fake_current_physical_time_ = fake_now;
-  }
-
- private:
-  base::TimeTicks fake_current_physical_time_;
-};
-
-class LayerTreeHostImplTestScrollbarAnimation : public LayerTreeHostImplTest {
- protected:
-  void SetupLayers(LayerTreeSettings settings) {
-    gfx::Size viewport_size(10, 10);
-    gfx::Size content_size(100, 100);
-
-    LayerTreeHostImplOverridePhysicalTime* host_impl_override_time =
-        new LayerTreeHostImplOverridePhysicalTime(settings, this, &proxy_,
-                                                  shared_bitmap_manager_.get(),
-                                                  &stats_instrumentation_);
-    host_impl_ = make_scoped_ptr(host_impl_override_time);
-    host_impl_->InitializeRenderer(CreateOutputSurface());
-    host_impl_->SetViewportSize(viewport_size);
-
-    scoped_ptr<LayerImpl> root =
-        LayerImpl::Create(host_impl_->active_tree(), 1);
-    root->SetBounds(viewport_size);
-
-    scoped_ptr<LayerImpl> scroll =
-        LayerImpl::Create(host_impl_->active_tree(), 2);
-    scroll->SetScrollClipLayer(root->id());
-    scroll->PushScrollOffsetFromMainThread(gfx::ScrollOffset());
-    root->SetBounds(viewport_size);
-    scroll->SetBounds(content_size);
-    scroll->SetContentBounds(content_size);
-    scroll->SetIsContainerForFixedPositionLayers(true);
-
-    scoped_ptr<LayerImpl> contents =
-        LayerImpl::Create(host_impl_->active_tree(), 3);
-    contents->SetDrawsContent(true);
-    contents->SetBounds(content_size);
-    contents->SetContentBounds(content_size);
-
-    scoped_ptr<SolidColorScrollbarLayerImpl> scrollbar =
-        SolidColorScrollbarLayerImpl::Create(host_impl_->active_tree(), 4,
-                                             VERTICAL, 10, 0, false, true);
-    EXPECT_FLOAT_EQ(0.f, scrollbar->opacity());
-
-    scroll->AddChild(contents.Pass());
-    root->AddChild(scroll.Pass());
-    root->SetHasRenderSurface(true);
-    scrollbar->SetScrollLayerAndClipLayerByIds(2, 1);
-    root->AddChild(scrollbar.Pass());
-
-    host_impl_->active_tree()->SetRootLayer(root.Pass());
-    host_impl_->active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 1, 2,
-                                                        Layer::INVALID_ID);
-    host_impl_->active_tree()->DidBecomeActive();
-    DrawFrame();
-  }
-
-  void RunTest(LayerTreeSettings::ScrollbarAnimator animator) {
-    LayerTreeSettings settings;
-    settings.scrollbar_animator = animator;
-    settings.scrollbar_fade_delay_ms = 20;
-    settings.scrollbar_fade_duration_ms = 20;
-
-    SetupLayers(settings);
-
-    base::TimeTicks fake_now = gfx::FrameTime::Now();
-
-    EXPECT_FALSE(did_request_animate_);
-    EXPECT_FALSE(did_request_redraw_);
-    EXPECT_EQ(base::TimeDelta(), requested_animation_delay_);
-    EXPECT_TRUE(animation_task_.Equals(base::Closure()));
-
-    // If no scroll happened during a scroll gesture, it should have no effect.
-    host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL);
-    host_impl_->ScrollEnd();
-    EXPECT_FALSE(did_request_animate_);
-    EXPECT_FALSE(did_request_redraw_);
-    EXPECT_EQ(base::TimeDelta(), requested_animation_delay_);
-    EXPECT_TRUE(animation_task_.Equals(base::Closure()));
-
-    // After a scroll, a scrollbar animation should be scheduled about 20ms from
-    // now.
-    host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL);
-    host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(0, 5));
-    EXPECT_FALSE(did_request_animate_);
-    EXPECT_TRUE(did_request_redraw_);
-    did_request_redraw_ = false;
-    EXPECT_EQ(base::TimeDelta(), requested_animation_delay_);
-    EXPECT_TRUE(animation_task_.Equals(base::Closure()));
-
-    host_impl_->ScrollEnd();
-    EXPECT_FALSE(did_request_animate_);
-    EXPECT_FALSE(did_request_redraw_);
-    EXPECT_EQ(base::TimeDelta::FromMilliseconds(20),
-              requested_animation_delay_);
-    EXPECT_FALSE(animation_task_.Equals(base::Closure()));
-
-    fake_now += requested_animation_delay_;
-    requested_animation_delay_ = base::TimeDelta();
-    animation_task_.Run();
-    animation_task_ = base::Closure();
-    EXPECT_TRUE(did_request_animate_);
-    did_request_animate_ = false;
-    EXPECT_FALSE(did_request_redraw_);
-
-    // After the scrollbar animation begins, we should start getting redraws.
-    host_impl_->Animate(fake_now);
-    EXPECT_TRUE(did_request_animate_);
-    did_request_animate_ = false;
-    EXPECT_TRUE(did_request_redraw_);
-    did_request_redraw_ = false;
-    EXPECT_EQ(base::TimeDelta(), requested_animation_delay_);
-    EXPECT_TRUE(animation_task_.Equals(base::Closure()));
-
-    // Setting the scroll offset outside a scroll should also cause the
-    // scrollbar to appear and to schedule a scrollbar animation.
-    host_impl_->InnerViewportScrollLayer()->PushScrollOffsetFromMainThread(
-        gfx::ScrollOffset(5, 5));
-    EXPECT_FALSE(did_request_animate_);
-    EXPECT_FALSE(did_request_redraw_);
-    EXPECT_EQ(base::TimeDelta::FromMilliseconds(20),
-              requested_animation_delay_);
-    EXPECT_FALSE(animation_task_.Equals(base::Closure()));
-    requested_animation_delay_ = base::TimeDelta();
-    animation_task_ = base::Closure();
-
-    // Scrollbar animation is not triggered unnecessarily.
-    host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL);
-    host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(5, 0));
-    EXPECT_FALSE(did_request_animate_);
-    EXPECT_TRUE(did_request_redraw_);
-    did_request_redraw_ = false;
-    EXPECT_EQ(base::TimeDelta(), requested_animation_delay_);
-    EXPECT_TRUE(animation_task_.Equals(base::Closure()));
-
-    host_impl_->ScrollEnd();
-    EXPECT_FALSE(did_request_animate_);
-    EXPECT_FALSE(did_request_redraw_);
-    EXPECT_EQ(base::TimeDelta(), requested_animation_delay_);
-    EXPECT_TRUE(animation_task_.Equals(base::Closure()));
-
-    // Changing page scale triggers scrollbar animation.
-    host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, 1.f, 4.f);
-    host_impl_->SetPageScaleOnActiveTree(1.1f);
-    EXPECT_FALSE(did_request_animate_);
-    EXPECT_FALSE(did_request_redraw_);
-    EXPECT_EQ(base::TimeDelta::FromMilliseconds(20),
-              requested_animation_delay_);
-    EXPECT_FALSE(animation_task_.Equals(base::Closure()));
-    requested_animation_delay_ = base::TimeDelta();
-    animation_task_ = base::Closure();
-  }
-};
-
-TEST_F(LayerTreeHostImplTestScrollbarAnimation, LinearFade) {
-  RunTest(LayerTreeSettings::LINEAR_FADE);
-}
-
-TEST_F(LayerTreeHostImplTestScrollbarAnimation, Thinning) {
-  RunTest(LayerTreeSettings::THINNING);
-}
-
-void LayerTreeHostImplTest::SetupMouseMoveAtWithDeviceScale(
-    float device_scale_factor) {
-  LayerTreeSettings settings;
-  settings.scrollbar_fade_delay_ms = 500;
-  settings.scrollbar_fade_duration_ms = 300;
-  settings.scrollbar_animator = LayerTreeSettings::THINNING;
-
-  gfx::Size viewport_size(300, 200);
-  gfx::Size device_viewport_size = gfx::ToFlooredSize(
-      gfx::ScaleSize(viewport_size, device_scale_factor));
-  gfx::Size content_size(1000, 1000);
-
-  CreateHostImpl(settings, CreateOutputSurface());
-  host_impl_->SetDeviceScaleFactor(device_scale_factor);
-  host_impl_->SetViewportSize(device_viewport_size);
-
-  scoped_ptr<LayerImpl> root =
-      LayerImpl::Create(host_impl_->active_tree(), 1);
-  root->SetBounds(viewport_size);
-  root->SetHasRenderSurface(true);
-
-  scoped_ptr<LayerImpl> scroll =
-      LayerImpl::Create(host_impl_->active_tree(), 2);
-  scroll->SetScrollClipLayer(root->id());
-  scroll->PushScrollOffsetFromMainThread(gfx::ScrollOffset());
-  scroll->SetBounds(content_size);
-  scroll->SetContentBounds(content_size);
-  scroll->SetIsContainerForFixedPositionLayers(true);
-
-  scoped_ptr<LayerImpl> contents =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  contents->SetDrawsContent(true);
-  contents->SetBounds(content_size);
-  contents->SetContentBounds(content_size);
-
-  // The scrollbar is on the right side.
-  scoped_ptr<PaintedScrollbarLayerImpl> scrollbar =
-      PaintedScrollbarLayerImpl::Create(host_impl_->active_tree(), 5, VERTICAL);
-  scrollbar->SetDrawsContent(true);
-  scrollbar->SetBounds(gfx::Size(15, viewport_size.height()));
-  scrollbar->SetContentBounds(gfx::Size(15, viewport_size.height()));
-  scrollbar->SetPosition(gfx::Point(285, 0));
-
-  scroll->AddChild(contents.Pass());
-  root->AddChild(scroll.Pass());
-  scrollbar->SetScrollLayerAndClipLayerByIds(2, 1);
-  root->AddChild(scrollbar.Pass());
-
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-  host_impl_->active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 1, 2,
-                                                      Layer::INVALID_ID);
-  host_impl_->active_tree()->DidBecomeActive();
-  DrawFrame();
-
-  LayerImpl* root_scroll =
-      host_impl_->active_tree()->InnerViewportScrollLayer();
-  ASSERT_TRUE(root_scroll->scrollbar_animation_controller());
-  ScrollbarAnimationControllerThinning* scrollbar_animation_controller =
-      static_cast<ScrollbarAnimationControllerThinning*>(
-          root_scroll->scrollbar_animation_controller());
-  scrollbar_animation_controller->set_mouse_move_distance_for_test(100.f);
-
-  host_impl_->MouseMoveAt(gfx::Point(1, 1));
-  EXPECT_FALSE(scrollbar_animation_controller->mouse_is_near_scrollbar());
-
-  host_impl_->MouseMoveAt(gfx::Point(200, 50));
-  EXPECT_TRUE(scrollbar_animation_controller->mouse_is_near_scrollbar());
-
-  host_impl_->MouseMoveAt(gfx::Point(184, 100));
-  EXPECT_FALSE(scrollbar_animation_controller->mouse_is_near_scrollbar());
-
-  scrollbar_animation_controller->set_mouse_move_distance_for_test(102.f);
-  host_impl_->MouseMoveAt(gfx::Point(184, 100));
-  EXPECT_TRUE(scrollbar_animation_controller->mouse_is_near_scrollbar());
-
-  did_request_redraw_ = false;
-  EXPECT_EQ(0, host_impl_->scroll_layer_id_when_mouse_over_scrollbar());
-  host_impl_->MouseMoveAt(gfx::Point(290, 100));
-  EXPECT_EQ(2, host_impl_->scroll_layer_id_when_mouse_over_scrollbar());
-  host_impl_->MouseMoveAt(gfx::Point(290, 120));
-  EXPECT_EQ(2, host_impl_->scroll_layer_id_when_mouse_over_scrollbar());
-  host_impl_->MouseMoveAt(gfx::Point(150, 120));
-  EXPECT_EQ(0, host_impl_->scroll_layer_id_when_mouse_over_scrollbar());
-}
-
-TEST_F(LayerTreeHostImplTest, MouseMoveAtWithDeviceScaleOf1) {
-  SetupMouseMoveAtWithDeviceScale(1.f);
-}
-
-TEST_F(LayerTreeHostImplTest, MouseMoveAtWithDeviceScaleOf2) {
-  SetupMouseMoveAtWithDeviceScale(2.f);
-}
-
-TEST_F(LayerTreeHostImplTest, CompositorFrameMetadata) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, 0.5f, 4.f);
-  DrawFrame();
-  {
-    CompositorFrameMetadata metadata =
-        host_impl_->MakeCompositorFrameMetadata();
-    EXPECT_EQ(gfx::Vector2dF(), metadata.root_scroll_offset);
-    EXPECT_EQ(1.f, metadata.page_scale_factor);
-    EXPECT_EQ(gfx::SizeF(50.f, 50.f), metadata.scrollable_viewport_size);
-    EXPECT_EQ(gfx::SizeF(100.f, 100.f), metadata.root_layer_size);
-    EXPECT_EQ(0.5f, metadata.min_page_scale_factor);
-    EXPECT_EQ(4.f, metadata.max_page_scale_factor);
-    EXPECT_FALSE(metadata.root_overflow_x_hidden);
-    EXPECT_FALSE(metadata.root_overflow_y_hidden);
-  }
-
-  // Scrolling should update metadata immediately.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10));
-  {
-    CompositorFrameMetadata metadata =
-        host_impl_->MakeCompositorFrameMetadata();
-    EXPECT_EQ(gfx::Vector2dF(0.f, 10.f), metadata.root_scroll_offset);
-  }
-  host_impl_->ScrollEnd();
-  {
-    CompositorFrameMetadata metadata =
-        host_impl_->MakeCompositorFrameMetadata();
-    EXPECT_EQ(gfx::Vector2dF(0.f, 10.f), metadata.root_scroll_offset);
-  }
-
-  // Root "overflow: hidden" properties should be reflected.
-  {
-    host_impl_->active_tree()
-        ->InnerViewportScrollLayer()
-        ->set_user_scrollable_horizontal(false);
-    CompositorFrameMetadata metadata =
-        host_impl_->MakeCompositorFrameMetadata();
-    EXPECT_TRUE(metadata.root_overflow_x_hidden);
-    EXPECT_FALSE(metadata.root_overflow_y_hidden);
-
-    host_impl_->active_tree()
-        ->InnerViewportScrollLayer()
-        ->set_user_scrollable_vertical(false);
-    metadata = host_impl_->MakeCompositorFrameMetadata();
-    EXPECT_TRUE(metadata.root_overflow_x_hidden);
-    EXPECT_TRUE(metadata.root_overflow_y_hidden);
-  }
-
-  // Page scale should update metadata correctly (shrinking only the viewport).
-  host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE);
-  host_impl_->PinchGestureBegin();
-  host_impl_->PinchGestureUpdate(2.f, gfx::Point());
-  host_impl_->PinchGestureEnd();
-  host_impl_->ScrollEnd();
-  {
-    CompositorFrameMetadata metadata =
-        host_impl_->MakeCompositorFrameMetadata();
-    EXPECT_EQ(gfx::Vector2dF(0.f, 10.f), metadata.root_scroll_offset);
-    EXPECT_EQ(2.f, metadata.page_scale_factor);
-    EXPECT_EQ(gfx::SizeF(25.f, 25.f), metadata.scrollable_viewport_size);
-    EXPECT_EQ(gfx::SizeF(100.f, 100.f), metadata.root_layer_size);
-    EXPECT_EQ(0.5f, metadata.min_page_scale_factor);
-    EXPECT_EQ(4.f, metadata.max_page_scale_factor);
-  }
-
-  // Likewise if set from the main thread.
-  host_impl_->ProcessScrollDeltas();
-  host_impl_->active_tree()->PushPageScaleFromMainThread(4.f, 0.5f, 4.f);
-  host_impl_->SetPageScaleOnActiveTree(4.f);
-  {
-    CompositorFrameMetadata metadata =
-        host_impl_->MakeCompositorFrameMetadata();
-    EXPECT_EQ(gfx::Vector2dF(0.f, 10.f), metadata.root_scroll_offset);
-    EXPECT_EQ(4.f, metadata.page_scale_factor);
-    EXPECT_EQ(gfx::SizeF(12.5f, 12.5f), metadata.scrollable_viewport_size);
-    EXPECT_EQ(gfx::SizeF(100.f, 100.f), metadata.root_layer_size);
-    EXPECT_EQ(0.5f, metadata.min_page_scale_factor);
-    EXPECT_EQ(4.f, metadata.max_page_scale_factor);
-  }
-}
-
-class DidDrawCheckLayer : public LayerImpl {
- public:
-  static scoped_ptr<LayerImpl> Create(LayerTreeImpl* tree_impl, int id) {
-    return make_scoped_ptr(new DidDrawCheckLayer(tree_impl, id));
-  }
-
-  bool WillDraw(DrawMode draw_mode, ResourceProvider* provider) override {
-    will_draw_called_ = true;
-    if (will_draw_returns_false_)
-      return false;
-    return LayerImpl::WillDraw(draw_mode, provider);
-  }
-
-  void AppendQuads(RenderPass* render_pass,
-                   AppendQuadsData* append_quads_data) override {
-    append_quads_called_ = true;
-    LayerImpl::AppendQuads(render_pass, append_quads_data);
-  }
-
-  void DidDraw(ResourceProvider* provider) override {
-    did_draw_called_ = true;
-    LayerImpl::DidDraw(provider);
-  }
-
-  bool will_draw_called() const { return will_draw_called_; }
-  bool append_quads_called() const { return append_quads_called_; }
-  bool did_draw_called() const { return did_draw_called_; }
-
-  void set_will_draw_returns_false() { will_draw_returns_false_ = true; }
-
-  void ClearDidDrawCheck() {
-    will_draw_called_ = false;
-    append_quads_called_ = false;
-    did_draw_called_ = false;
-  }
-
-  static void IgnoreResult(scoped_ptr<CopyOutputResult> result) {}
-
-  void AddCopyRequest() {
-    ScopedPtrVector<CopyOutputRequest> requests;
-    requests.push_back(
-        CopyOutputRequest::CreateRequest(base::Bind(&IgnoreResult)));
-    SetHasRenderSurface(true);
-    PassCopyRequests(&requests);
-  }
-
- protected:
-  DidDrawCheckLayer(LayerTreeImpl* tree_impl, int id)
-      : LayerImpl(tree_impl, id),
-        will_draw_returns_false_(false),
-        will_draw_called_(false),
-        append_quads_called_(false),
-        did_draw_called_(false) {
-    SetBounds(gfx::Size(10, 10));
-    SetContentBounds(gfx::Size(10, 10));
-    SetDrawsContent(true);
-    draw_properties().visible_content_rect = gfx::Rect(0, 0, 10, 10);
-  }
-
- private:
-  bool will_draw_returns_false_;
-  bool will_draw_called_;
-  bool append_quads_called_;
-  bool did_draw_called_;
-};
-
-TEST_F(LayerTreeHostImplTest, WillDrawReturningFalseDoesNotCall) {
-  // The root layer is always drawn, so run this test on a child layer that
-  // will be masked out by the root layer's bounds.
-  host_impl_->active_tree()->SetRootLayer(
-      DidDrawCheckLayer::Create(host_impl_->active_tree(), 1));
-  DidDrawCheckLayer* root = static_cast<DidDrawCheckLayer*>(
-      host_impl_->active_tree()->root_layer());
-
-  root->AddChild(DidDrawCheckLayer::Create(host_impl_->active_tree(), 2));
-  root->SetHasRenderSurface(true);
-  DidDrawCheckLayer* layer =
-      static_cast<DidDrawCheckLayer*>(root->children()[0]);
-
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-
-    EXPECT_TRUE(layer->will_draw_called());
-    EXPECT_TRUE(layer->append_quads_called());
-    EXPECT_TRUE(layer->did_draw_called());
-  }
-
-  host_impl_->SetViewportDamage(gfx::Rect(10, 10));
-
-  {
-    LayerTreeHostImpl::FrameData frame;
-
-    layer->set_will_draw_returns_false();
-    layer->ClearDidDrawCheck();
-
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-
-    EXPECT_TRUE(layer->will_draw_called());
-    EXPECT_FALSE(layer->append_quads_called());
-    EXPECT_FALSE(layer->did_draw_called());
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, DidDrawNotCalledOnHiddenLayer) {
-  // The root layer is always drawn, so run this test on a child layer that
-  // will be masked out by the root layer's bounds.
-  host_impl_->active_tree()->SetRootLayer(
-      DidDrawCheckLayer::Create(host_impl_->active_tree(), 1));
-  DidDrawCheckLayer* root = static_cast<DidDrawCheckLayer*>(
-      host_impl_->active_tree()->root_layer());
-  root->SetMasksToBounds(true);
-  root->SetHasRenderSurface(true);
-  root->AddChild(DidDrawCheckLayer::Create(host_impl_->active_tree(), 2));
-  DidDrawCheckLayer* layer =
-      static_cast<DidDrawCheckLayer*>(root->children()[0]);
-  // Ensure visible_content_rect for layer is empty.
-  layer->SetPosition(gfx::PointF(100.f, 100.f));
-  layer->SetBounds(gfx::Size(10, 10));
-  layer->SetContentBounds(gfx::Size(10, 10));
-
-  LayerTreeHostImpl::FrameData frame;
-
-  EXPECT_FALSE(layer->will_draw_called());
-  EXPECT_FALSE(layer->did_draw_called());
-
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-
-  EXPECT_FALSE(layer->will_draw_called());
-  EXPECT_FALSE(layer->did_draw_called());
-
-  EXPECT_TRUE(layer->visible_content_rect().IsEmpty());
-
-  // Ensure visible_content_rect for layer is not empty
-  layer->SetPosition(gfx::PointF());
-
-  EXPECT_FALSE(layer->will_draw_called());
-  EXPECT_FALSE(layer->did_draw_called());
-
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-
-  EXPECT_TRUE(layer->will_draw_called());
-  EXPECT_TRUE(layer->did_draw_called());
-
-  EXPECT_FALSE(layer->visible_content_rect().IsEmpty());
-}
-
-TEST_F(LayerTreeHostImplTest, WillDrawNotCalledOnOccludedLayer) {
-  gfx::Size big_size(1000, 1000);
-  host_impl_->SetViewportSize(big_size);
-
-  host_impl_->active_tree()->SetRootLayer(
-      DidDrawCheckLayer::Create(host_impl_->active_tree(), 1));
-  DidDrawCheckLayer* root =
-      static_cast<DidDrawCheckLayer*>(host_impl_->active_tree()->root_layer());
-
-  root->AddChild(DidDrawCheckLayer::Create(host_impl_->active_tree(), 2));
-  DidDrawCheckLayer* occluded_layer =
-      static_cast<DidDrawCheckLayer*>(root->children()[0]);
-
-  root->AddChild(DidDrawCheckLayer::Create(host_impl_->active_tree(), 3));
-  root->SetHasRenderSurface(true);
-  DidDrawCheckLayer* top_layer =
-      static_cast<DidDrawCheckLayer*>(root->children()[1]);
-  // This layer covers the occluded_layer above. Make this layer large so it can
-  // occlude.
-  top_layer->SetBounds(big_size);
-  top_layer->SetContentBounds(big_size);
-  top_layer->SetContentsOpaque(true);
-
-  LayerTreeHostImpl::FrameData frame;
-
-  EXPECT_FALSE(occluded_layer->will_draw_called());
-  EXPECT_FALSE(occluded_layer->did_draw_called());
-  EXPECT_FALSE(top_layer->will_draw_called());
-  EXPECT_FALSE(top_layer->did_draw_called());
-
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-
-  EXPECT_FALSE(occluded_layer->will_draw_called());
-  EXPECT_FALSE(occluded_layer->did_draw_called());
-  EXPECT_TRUE(top_layer->will_draw_called());
-  EXPECT_TRUE(top_layer->did_draw_called());
-}
-
-TEST_F(LayerTreeHostImplTest, DidDrawCalledOnAllLayers) {
-  host_impl_->active_tree()->SetRootLayer(
-      DidDrawCheckLayer::Create(host_impl_->active_tree(), 1));
-  DidDrawCheckLayer* root =
-      static_cast<DidDrawCheckLayer*>(host_impl_->active_tree()->root_layer());
-
-  root->AddChild(DidDrawCheckLayer::Create(host_impl_->active_tree(), 2));
-  root->SetHasRenderSurface(true);
-  DidDrawCheckLayer* layer1 =
-      static_cast<DidDrawCheckLayer*>(root->children()[0]);
-
-  layer1->AddChild(DidDrawCheckLayer::Create(host_impl_->active_tree(), 3));
-  DidDrawCheckLayer* layer2 =
-      static_cast<DidDrawCheckLayer*>(layer1->children()[0]);
-
-  layer1->SetHasRenderSurface(true);
-  layer1->SetShouldFlattenTransform(true);
-
-  EXPECT_FALSE(root->did_draw_called());
-  EXPECT_FALSE(layer1->did_draw_called());
-  EXPECT_FALSE(layer2->did_draw_called());
-
-  LayerTreeHostImpl::FrameData frame;
-  FakeLayerTreeHostImpl::RecursiveUpdateNumChildren(
-      host_impl_->active_tree()->root_layer());
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-
-  EXPECT_TRUE(root->did_draw_called());
-  EXPECT_TRUE(layer1->did_draw_called());
-  EXPECT_TRUE(layer2->did_draw_called());
-
-  EXPECT_NE(root->render_surface(), layer1->render_surface());
-  EXPECT_TRUE(!!layer1->render_surface());
-}
-
-class MissingTextureAnimatingLayer : public DidDrawCheckLayer {
- public:
-  static scoped_ptr<LayerImpl> Create(LayerTreeImpl* tree_impl,
-                                      int id,
-                                      bool tile_missing,
-                                      bool had_incomplete_tile,
-                                      bool animating,
-                                      ResourceProvider* resource_provider) {
-    return make_scoped_ptr(new MissingTextureAnimatingLayer(tree_impl,
-                                                            id,
-                                                            tile_missing,
-                                                            had_incomplete_tile,
-                                                            animating,
-                                                            resource_provider));
-  }
-
-  void AppendQuads(RenderPass* render_pass,
-                   AppendQuadsData* append_quads_data) override {
-    LayerImpl::AppendQuads(render_pass, append_quads_data);
-    if (had_incomplete_tile_)
-      append_quads_data->num_incomplete_tiles++;
-    if (tile_missing_)
-      append_quads_data->num_missing_tiles++;
-  }
-
- private:
-  MissingTextureAnimatingLayer(LayerTreeImpl* tree_impl,
-                               int id,
-                               bool tile_missing,
-                               bool had_incomplete_tile,
-                               bool animating,
-                               ResourceProvider* resource_provider)
-      : DidDrawCheckLayer(tree_impl, id),
-        tile_missing_(tile_missing),
-        had_incomplete_tile_(had_incomplete_tile) {
-    if (animating)
-      AddAnimatedTransformToLayer(this, 10.0, 3, 0);
-  }
-
-  bool tile_missing_;
-  bool had_incomplete_tile_;
-};
-
-struct PrepareToDrawSuccessTestCase {
-  struct State {
-    bool has_missing_tile = false;
-    bool has_incomplete_tile = false;
-    bool is_animating = false;
-    bool has_copy_request = false;
-  };
-  bool high_res_required = false;
-  State layer_before;
-  State layer_between;
-  State layer_after;
-  DrawResult expected_result;
-
-  explicit PrepareToDrawSuccessTestCase(DrawResult result)
-      : expected_result(result) {}
-};
-
-TEST_F(LayerTreeHostImplTest, PrepareToDrawSucceedsAndFails) {
-  std::vector<PrepareToDrawSuccessTestCase> cases;
-
-  // 0. Default case.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  // 1. Animated layer first.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().layer_before.is_animating = true;
-  // 2. Animated layer between.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().layer_between.is_animating = true;
-  // 3. Animated layer last.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().layer_after.is_animating = true;
-  // 4. Missing tile first.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().layer_before.has_missing_tile = true;
-  // 5. Missing tile between.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().layer_between.has_missing_tile = true;
-  // 6. Missing tile last.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().layer_after.has_missing_tile = true;
-  // 7. Incomplete tile first.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().layer_before.has_incomplete_tile = true;
-  // 8. Incomplete tile between.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().layer_between.has_incomplete_tile = true;
-  // 9. Incomplete tile last.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().layer_after.has_incomplete_tile = true;
-  // 10. Animation with missing tile.
-  cases.push_back(
-      PrepareToDrawSuccessTestCase(DRAW_ABORTED_CHECKERBOARD_ANIMATIONS));
-  cases.back().layer_between.has_missing_tile = true;
-  cases.back().layer_between.is_animating = true;
-  // 11. Animation with missing tile and copy request after. Must succeed
-  // because the animation checkerboard means we'll get a new frame and the copy
-  // request's layer may be destroyed.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().layer_between.has_missing_tile = true;
-  cases.back().layer_between.is_animating = true;
-  cases.back().layer_after.has_copy_request = true;
-  // 12. Animation with missing tile and copy request before. Must succeed
-  // because the animation checkerboard means we'll get a new frame and the copy
-  // request's layer may be destroyed.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().layer_between.has_missing_tile = true;
-  cases.back().layer_between.is_animating = true;
-  cases.back().layer_before.has_copy_request = true;
-  // 13. Animation with incomplete tile.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().layer_between.has_incomplete_tile = true;
-  cases.back().layer_between.is_animating = true;
-
-  // 14. High res required.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().high_res_required = true;
-  // 15. High res required with incomplete tile.
-  cases.push_back(
-      PrepareToDrawSuccessTestCase(DRAW_ABORTED_MISSING_HIGH_RES_CONTENT));
-  cases.back().high_res_required = true;
-  cases.back().layer_between.has_incomplete_tile = true;
-  // 16. High res required with missing tile.
-  cases.push_back(
-      PrepareToDrawSuccessTestCase(DRAW_ABORTED_MISSING_HIGH_RES_CONTENT));
-  cases.back().high_res_required = true;
-  cases.back().layer_between.has_missing_tile = true;
-
-  // 17. High res required is higher priority than animating missing tiles.
-  cases.push_back(
-      PrepareToDrawSuccessTestCase(DRAW_ABORTED_MISSING_HIGH_RES_CONTENT));
-  cases.back().high_res_required = true;
-  cases.back().layer_between.has_missing_tile = true;
-  cases.back().layer_after.has_missing_tile = true;
-  cases.back().layer_after.is_animating = true;
-  // 18. High res required is higher priority than animating missing tiles.
-  cases.push_back(
-      PrepareToDrawSuccessTestCase(DRAW_ABORTED_MISSING_HIGH_RES_CONTENT));
-  cases.back().high_res_required = true;
-  cases.back().layer_between.has_missing_tile = true;
-  cases.back().layer_before.has_missing_tile = true;
-  cases.back().layer_before.is_animating = true;
-
-  // 19. High res required is higher priority than copy requests.
-  cases.push_back(
-      PrepareToDrawSuccessTestCase(DRAW_ABORTED_MISSING_HIGH_RES_CONTENT));
-  cases.back().high_res_required = true;
-  cases.back().layer_between.has_missing_tile = true;
-  cases.back().layer_after.has_copy_request = true;
-  // 20. High res required is higher priority than copy requests.
-  cases.push_back(
-      PrepareToDrawSuccessTestCase(DRAW_ABORTED_MISSING_HIGH_RES_CONTENT));
-  cases.back().high_res_required = true;
-  cases.back().layer_between.has_missing_tile = true;
-  cases.back().layer_before.has_copy_request = true;
-  // 21. High res required is higher priority than copy requests.
-  cases.push_back(
-      PrepareToDrawSuccessTestCase(DRAW_ABORTED_MISSING_HIGH_RES_CONTENT));
-  cases.back().high_res_required = true;
-  cases.back().layer_between.has_missing_tile = true;
-  cases.back().layer_between.has_copy_request = true;
-
-  host_impl_->active_tree()->SetRootLayer(
-      DidDrawCheckLayer::Create(host_impl_->active_tree(), 1));
-  DidDrawCheckLayer* root =
-      static_cast<DidDrawCheckLayer*>(host_impl_->active_tree()->root_layer());
-  root->SetHasRenderSurface(true);
-
-  LayerTreeHostImpl::FrameData frame;
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-  host_impl_->SwapBuffers(frame);
-
-  for (size_t i = 0; i < cases.size(); ++i) {
-    const auto& testcase = cases[i];
-    std::vector<LayerImpl*> to_remove;
-    for (auto* child : root->children())
-      to_remove.push_back(child);
-    for (auto* child : to_remove)
-      root->RemoveChild(child);
-
-    std::ostringstream scope;
-    scope << "Test case: " << i;
-    SCOPED_TRACE(scope.str());
-
-    root->AddChild(MissingTextureAnimatingLayer::Create(
-        host_impl_->active_tree(), 2, testcase.layer_before.has_missing_tile,
-        testcase.layer_before.has_incomplete_tile,
-        testcase.layer_before.is_animating, host_impl_->resource_provider()));
-    DidDrawCheckLayer* before =
-        static_cast<DidDrawCheckLayer*>(root->children().back());
-    if (testcase.layer_before.has_copy_request)
-      before->AddCopyRequest();
-
-    root->AddChild(MissingTextureAnimatingLayer::Create(
-        host_impl_->active_tree(), 3, testcase.layer_between.has_missing_tile,
-        testcase.layer_between.has_incomplete_tile,
-        testcase.layer_between.is_animating, host_impl_->resource_provider()));
-    DidDrawCheckLayer* between =
-        static_cast<DidDrawCheckLayer*>(root->children().back());
-    if (testcase.layer_between.has_copy_request)
-      between->AddCopyRequest();
-
-    root->AddChild(MissingTextureAnimatingLayer::Create(
-        host_impl_->active_tree(), 4, testcase.layer_after.has_missing_tile,
-        testcase.layer_after.has_incomplete_tile,
-        testcase.layer_after.is_animating, host_impl_->resource_provider()));
-    DidDrawCheckLayer* after =
-        static_cast<DidDrawCheckLayer*>(root->children().back());
-    if (testcase.layer_after.has_copy_request)
-      after->AddCopyRequest();
-
-    if (testcase.high_res_required)
-      host_impl_->SetRequiresHighResToDraw();
-
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(testcase.expected_result, host_impl_->PrepareToDraw(&frame));
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-    host_impl_->SwapBuffers(frame);
-  }
-}
-
-TEST_F(LayerTreeHostImplTest,
-       PrepareToDrawWhenDrawAndSwapFullViewportEveryFrame) {
-  CreateHostImpl(DefaultSettings(),
-                 FakeOutputSurface::CreateAlwaysDrawAndSwap3d());
-  EXPECT_TRUE(host_impl_->output_surface()
-                  ->capabilities()
-                  .draw_and_swap_full_viewport_every_frame);
-
-  std::vector<PrepareToDrawSuccessTestCase> cases;
-
-  // 0. Default case.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  // 1. Animation with missing tile.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().layer_between.has_missing_tile = true;
-  cases.back().layer_between.is_animating = true;
-  // 2. High res required with incomplete tile.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().high_res_required = true;
-  cases.back().layer_between.has_incomplete_tile = true;
-  // 3. High res required with missing tile.
-  cases.push_back(PrepareToDrawSuccessTestCase(DRAW_SUCCESS));
-  cases.back().high_res_required = true;
-  cases.back().layer_between.has_missing_tile = true;
-
-  host_impl_->active_tree()->SetRootLayer(
-      DidDrawCheckLayer::Create(host_impl_->active_tree(), 1));
-  DidDrawCheckLayer* root =
-      static_cast<DidDrawCheckLayer*>(host_impl_->active_tree()->root_layer());
-  root->SetHasRenderSurface(true);
-
-  LayerTreeHostImpl::FrameData frame;
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-  host_impl_->SwapBuffers(frame);
-
-  for (size_t i = 0; i < cases.size(); ++i) {
-    const auto& testcase = cases[i];
-    std::vector<LayerImpl*> to_remove;
-    for (auto* child : root->children())
-      to_remove.push_back(child);
-    for (auto* child : to_remove)
-      root->RemoveChild(child);
-
-    std::ostringstream scope;
-    scope << "Test case: " << i;
-    SCOPED_TRACE(scope.str());
-
-    root->AddChild(MissingTextureAnimatingLayer::Create(
-        host_impl_->active_tree(), 2, testcase.layer_before.has_missing_tile,
-        testcase.layer_before.has_incomplete_tile,
-        testcase.layer_before.is_animating, host_impl_->resource_provider()));
-    DidDrawCheckLayer* before =
-        static_cast<DidDrawCheckLayer*>(root->children().back());
-    if (testcase.layer_before.has_copy_request)
-      before->AddCopyRequest();
-
-    root->AddChild(MissingTextureAnimatingLayer::Create(
-        host_impl_->active_tree(), 3, testcase.layer_between.has_missing_tile,
-        testcase.layer_between.has_incomplete_tile,
-        testcase.layer_between.is_animating, host_impl_->resource_provider()));
-    DidDrawCheckLayer* between =
-        static_cast<DidDrawCheckLayer*>(root->children().back());
-    if (testcase.layer_between.has_copy_request)
-      between->AddCopyRequest();
-
-    root->AddChild(MissingTextureAnimatingLayer::Create(
-        host_impl_->active_tree(), 4, testcase.layer_after.has_missing_tile,
-        testcase.layer_after.has_incomplete_tile,
-        testcase.layer_after.is_animating, host_impl_->resource_provider()));
-    DidDrawCheckLayer* after =
-        static_cast<DidDrawCheckLayer*>(root->children().back());
-    if (testcase.layer_after.has_copy_request)
-      after->AddCopyRequest();
-
-    if (testcase.high_res_required)
-      host_impl_->SetRequiresHighResToDraw();
-
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(testcase.expected_result, host_impl_->PrepareToDraw(&frame));
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-    host_impl_->SwapBuffers(frame);
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollRootIgnored) {
-  scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl_->active_tree(), 1);
-  root->SetScrollClipLayer(Layer::INVALID_ID);
-  root->SetHasRenderSurface(true);
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-  DrawFrame();
-
-  // Scroll event is ignored because layer is not scrollable.
-  EXPECT_EQ(InputHandler::SCROLL_IGNORED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-  EXPECT_FALSE(did_request_redraw_);
-  EXPECT_FALSE(did_request_commit_);
-}
-
-// TODO(bokan): Convert these tests to create inner and outer viewports.
-class LayerTreeHostImplTopControlsTest : public LayerTreeHostImplTest {
- public:
-  LayerTreeHostImplTopControlsTest()
-      // Make the clip size the same as the layer (content) size so the layer is
-      // non-scrollable.
-      : layer_size_(10, 10),
-        clip_size_(layer_size_),
-        top_controls_height_(50) {
-    settings_.use_pinch_virtual_viewport = true;
-
-    viewport_size_ = gfx::Size(clip_size_.width(),
-                               clip_size_.height() + top_controls_height_);
-  }
-
-  bool CreateHostImpl(const LayerTreeSettings& settings,
-                      scoped_ptr<OutputSurface> output_surface) override {
-    bool init =
-        LayerTreeHostImplTest::CreateHostImpl(settings, output_surface.Pass());
-    if (init) {
-      host_impl_->active_tree()->set_top_controls_height(top_controls_height_);
-      host_impl_->active_tree()->SetCurrentTopControlsShownRatio(1.f);
-    }
-    return init;
-  }
-
-  void SetupTopControlsAndScrollLayer() {
-    scoped_ptr<LayerImpl> root =
-        LayerImpl::Create(host_impl_->active_tree(), 1);
-    scoped_ptr<LayerImpl> root_clip =
-        LayerImpl::Create(host_impl_->active_tree(), 2);
-    root_clip->SetBounds(clip_size_);
-    root->SetScrollClipLayer(root_clip->id());
-    root->SetBounds(layer_size_);
-    root->SetContentBounds(layer_size_);
-    root->SetPosition(gfx::PointF());
-    root->SetDrawsContent(false);
-    root->SetIsContainerForFixedPositionLayers(true);
-    int inner_viewport_scroll_layer_id = root->id();
-    int page_scale_layer_id = root_clip->id();
-    root_clip->SetHasRenderSurface(true);
-    root_clip->AddChild(root.Pass());
-    root_clip->SetHasRenderSurface(true);
-    host_impl_->active_tree()->SetRootLayer(root_clip.Pass());
-    host_impl_->active_tree()->SetViewportLayersFromIds(
-        Layer::INVALID_ID, page_scale_layer_id, inner_viewport_scroll_layer_id,
-        Layer::INVALID_ID);
-    // Set a viewport size that is large enough to contain both the top controls
-    // and some content.
-    host_impl_->SetViewportSize(viewport_size_);
-    host_impl_->sync_tree()->set_top_controls_shrink_blink_size(true);
-
-    host_impl_->DidChangeTopControlsPosition();
-
-    host_impl_->CreatePendingTree();
-    host_impl_->sync_tree()->set_top_controls_height(top_controls_height_);
-    root =
-        LayerImpl::Create(host_impl_->sync_tree(), 1);
-    root_clip =
-        LayerImpl::Create(host_impl_->sync_tree(), 2);
-    root_clip->SetBounds(clip_size_);
-    root->SetScrollClipLayer(root_clip->id());
-    root->SetBounds(layer_size_);
-    root->SetContentBounds(layer_size_);
-    root->SetPosition(gfx::PointF());
-    root->SetDrawsContent(false);
-    root->SetIsContainerForFixedPositionLayers(true);
-    inner_viewport_scroll_layer_id = root->id();
-    page_scale_layer_id = root_clip->id();
-    root_clip->AddChild(root.Pass());
-    host_impl_->sync_tree()->SetRootLayer(root_clip.Pass());
-    host_impl_->sync_tree()->SetViewportLayersFromIds(
-        Layer::INVALID_ID, page_scale_layer_id, inner_viewport_scroll_layer_id,
-        Layer::INVALID_ID);
-    // Set a viewport size that is large enough to contain both the top controls
-    // and some content.
-    host_impl_->SetViewportSize(viewport_size_);
-    host_impl_->sync_tree()->set_top_controls_shrink_blink_size(true);
-    host_impl_->DidChangeTopControlsPosition();
-  }
-
-  void SetupTopControlsAndScrollLayerWithVirtualViewport(
-      const gfx::Size& inner_viewport_size,
-      const gfx::Size& outer_viewport_size,
-      const gfx::Size& scroll_layer_size) {
-    CreateHostImpl(settings_, CreateOutputSurface());
-    host_impl_->sync_tree()->set_top_controls_shrink_blink_size(true);
-    host_impl_->sync_tree()->set_top_controls_height(top_controls_height_);
-    host_impl_->DidChangeTopControlsPosition();
-
-    scoped_ptr<LayerImpl> root =
-        LayerImpl::Create(host_impl_->active_tree(), 1);
-    scoped_ptr<LayerImpl> root_clip =
-        LayerImpl::Create(host_impl_->active_tree(), 2);
-    scoped_ptr<LayerImpl> page_scale =
-        LayerImpl::Create(host_impl_->active_tree(), 3);
-
-    scoped_ptr<LayerImpl> outer_scroll =
-        LayerImpl::Create(host_impl_->active_tree(), 4);
-    scoped_ptr<LayerImpl> outer_clip =
-        LayerImpl::Create(host_impl_->active_tree(), 5);
-
-    root_clip->SetBounds(inner_viewport_size);
-    root->SetScrollClipLayer(root_clip->id());
-    root->SetBounds(outer_viewport_size);
-    root->SetContentBounds(outer_viewport_size);
-    root->SetPosition(gfx::PointF());
-    root->SetDrawsContent(false);
-    root->SetIsContainerForFixedPositionLayers(true);
-    root_clip->SetHasRenderSurface(true);
-    outer_clip->SetBounds(outer_viewport_size);
-    outer_scroll->SetScrollClipLayer(outer_clip->id());
-    outer_scroll->SetBounds(scroll_layer_size);
-    outer_scroll->SetContentBounds(scroll_layer_size);
-    outer_scroll->SetPosition(gfx::PointF());
-    outer_scroll->SetDrawsContent(false);
-    outer_scroll->SetIsContainerForFixedPositionLayers(true);
-
-    int inner_viewport_scroll_layer_id = root->id();
-    int outer_viewport_scroll_layer_id = outer_scroll->id();
-    int page_scale_layer_id = page_scale->id();
-
-    outer_clip->AddChild(outer_scroll.Pass());
-    root->AddChild(outer_clip.Pass());
-    page_scale->AddChild(root.Pass());
-    root_clip->AddChild(page_scale.Pass());
-
-    host_impl_->active_tree()->SetRootLayer(root_clip.Pass());
-    host_impl_->active_tree()->SetViewportLayersFromIds(
-        Layer::INVALID_ID, page_scale_layer_id, inner_viewport_scroll_layer_id,
-        outer_viewport_scroll_layer_id);
-
-    host_impl_->SetViewportSize(inner_viewport_size);
-    LayerImpl* root_clip_ptr = host_impl_->active_tree()->root_layer();
-    EXPECT_EQ(inner_viewport_size, root_clip_ptr->bounds());
-  }
-
- protected:
-  gfx::Size layer_size_;
-  gfx::Size clip_size_;
-  gfx::Size viewport_size_;
-  float top_controls_height_;
-
-  LayerTreeSettings settings_;
-};  // class LayerTreeHostImplTopControlsTest
-
-TEST_F(LayerTreeHostImplTopControlsTest, ScrollTopControlsByFractionalAmount) {
-  SetupTopControlsAndScrollLayerWithVirtualViewport(
-      gfx::Size(10, 10), gfx::Size(10, 10), gfx::Size(10, 10));
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-
-  // Make the test scroll delta a fractional amount, to verify that the
-  // fixed container size delta is (1) non-zero, and (2) fractional, and
-  // (3) matches the movement of the top controls.
-  gfx::Vector2dF top_controls_scroll_delta(0.f, 5.25f);
-  host_impl_->top_controls_manager()->ScrollBegin();
-  host_impl_->top_controls_manager()->ScrollBy(top_controls_scroll_delta);
-  host_impl_->top_controls_manager()->ScrollEnd();
-
-  LayerImpl* inner_viewport_scroll_layer =
-      host_impl_->active_tree()->InnerViewportScrollLayer();
-  DCHECK(inner_viewport_scroll_layer);
-  host_impl_->ScrollEnd();
-  EXPECT_FLOAT_EQ(top_controls_scroll_delta.y(),
-                  inner_viewport_scroll_layer->FixedContainerSizeDelta().y());
-}
-
-// In this test, the outer viewport is initially unscrollable. We test that a
-// scroll initiated on the inner viewport, causing the top controls to show and
-// thus making the outer viewport scrollable, still scrolls the outer viewport.
-TEST_F(LayerTreeHostImplTopControlsTest,
-    TopControlsOuterViewportBecomesScrollable) {
-  SetupTopControlsAndScrollLayerWithVirtualViewport(
-      gfx::Size(10, 50), gfx::Size(10, 50), gfx::Size(10, 100));
-  DrawFrame();
-
-  LayerImpl *inner_scroll =
-      host_impl_->active_tree()->InnerViewportScrollLayer();
-  LayerImpl *inner_container =
-      host_impl_->active_tree()->InnerViewportContainerLayer();
-  LayerImpl *outer_scroll =
-      host_impl_->active_tree()->OuterViewportScrollLayer();
-  LayerImpl *outer_container =
-      host_impl_->active_tree()->OuterViewportContainerLayer();
-
-  // Need SetDrawsContent so ScrollBegin's hit test finds an actual layer.
-  outer_scroll->SetDrawsContent(true);
-  host_impl_->active_tree()->PushPageScaleFromMainThread(2.f, 1.f, 2.f);
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(0.f, 50.f));
-
-  // The entire scroll delta should have been used to hide the top controls.
-  // The viewport layers should be resized back to their full sizes.
-  EXPECT_EQ(0.f, host_impl_->active_tree()->CurrentTopControlsShownRatio());
-  EXPECT_EQ(0.f, inner_scroll->CurrentScrollOffset().y());
-  EXPECT_EQ(100.f, inner_container->BoundsForScrolling().height());
-  EXPECT_EQ(100.f, outer_container->BoundsForScrolling().height());
-
-  // The inner viewport should be scrollable by 50px * page_scale.
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(0.f, 100.f));
-  EXPECT_EQ(50.f, inner_scroll->CurrentScrollOffset().y());
-  EXPECT_EQ(0.f, outer_scroll->CurrentScrollOffset().y());
-  EXPECT_EQ(gfx::ScrollOffset(), outer_scroll->MaxScrollOffset());
-
-  host_impl_->ScrollEnd();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), inner_scroll);
-
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(0.f, -50.f));
-
-  // The entire scroll delta should have been used to show the top controls.
-  // The outer viewport should be resized to accomodate and scrolled to the
-  // bottom of the document to keep the viewport in place.
-  EXPECT_EQ(1.f, host_impl_->active_tree()->CurrentTopControlsShownRatio());
-  EXPECT_EQ(50.f, outer_container->BoundsForScrolling().height());
-  EXPECT_EQ(50.f, inner_container->BoundsForScrolling().height());
-  EXPECT_EQ(25.f, outer_scroll->CurrentScrollOffset().y());
-  EXPECT_EQ(25.f, inner_scroll->CurrentScrollOffset().y());
-
-  // Now when we continue scrolling, make sure the outer viewport gets scrolled
-  // since it wasn't scrollable when the scroll began.
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(0.f, -20.f));
-  EXPECT_EQ(15.f, outer_scroll->CurrentScrollOffset().y());
-  EXPECT_EQ(25.f, inner_scroll->CurrentScrollOffset().y());
-
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(0.f, -30.f));
-  EXPECT_EQ(0.f, outer_scroll->CurrentScrollOffset().y());
-  EXPECT_EQ(25.f, inner_scroll->CurrentScrollOffset().y());
-
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(0.f, -50.f));
-  host_impl_->ScrollEnd();
-
-  EXPECT_EQ(0.f, outer_scroll->CurrentScrollOffset().y());
-  EXPECT_EQ(0.f, inner_scroll->CurrentScrollOffset().y());
-}
-
-// Test that the fixed position container delta is appropriately adjusted
-// by the top controls showing/hiding and page scale doesn't affect it.
-TEST_F(LayerTreeHostImplTopControlsTest, FixedContainerDelta) {
-  SetupTopControlsAndScrollLayerWithVirtualViewport(
-      gfx::Size(100, 100), gfx::Size(100, 100), gfx::Size(100, 100));
-  DrawFrame();
-
-  float page_scale = 1.5f;
-  LayerImpl* outer_viewport_scroll_layer =
-      host_impl_->active_tree()->OuterViewportScrollLayer();
-
-  // Zoom in, since the fixed container is the outer viewport, the delta should
-  // not be scaled.
-  host_impl_->active_tree()->PushPageScaleFromMainThread(page_scale, 1.f, 2.f);
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-
-  // Scroll down, the top controls hiding should expand the viewport size so
-  // the delta should be equal to the scroll distance.
-  gfx::Vector2dF top_controls_scroll_delta(0.f, 20.f);
-  host_impl_->top_controls_manager()->ScrollBegin();
-  host_impl_->top_controls_manager()->ScrollBy(top_controls_scroll_delta);
-  EXPECT_FLOAT_EQ(top_controls_height_ - top_controls_scroll_delta.y(),
-                  host_impl_->top_controls_manager()->ContentTopOffset());
-  EXPECT_VECTOR_EQ(top_controls_scroll_delta,
-                   outer_viewport_scroll_layer->FixedContainerSizeDelta());
-  host_impl_->ScrollEnd();
-
-  // Scroll past the maximum extent. The delta shouldn't be greater than the
-  // top controls height.
-  host_impl_->top_controls_manager()->ScrollBegin();
-  host_impl_->top_controls_manager()->ScrollBy(top_controls_scroll_delta);
-  host_impl_->top_controls_manager()->ScrollBy(top_controls_scroll_delta);
-  host_impl_->top_controls_manager()->ScrollBy(top_controls_scroll_delta);
-  EXPECT_EQ(0.f, host_impl_->top_controls_manager()->ContentTopOffset());
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(0, top_controls_height_),
-                   outer_viewport_scroll_layer->FixedContainerSizeDelta());
-  host_impl_->ScrollEnd();
-
-  // Scroll in the direction to make the top controls show.
-  host_impl_->top_controls_manager()->ScrollBegin();
-  host_impl_->top_controls_manager()->ScrollBy(-top_controls_scroll_delta);
-  EXPECT_EQ(top_controls_scroll_delta.y(),
-            host_impl_->top_controls_manager()->ContentTopOffset());
-  EXPECT_VECTOR_EQ(
-      gfx::Vector2dF(0, top_controls_height_ - top_controls_scroll_delta.y()),
-      outer_viewport_scroll_layer->FixedContainerSizeDelta());
-  host_impl_->top_controls_manager()->ScrollEnd();
-}
-
-// Test that if a scrollable sublayer doesn't consume the scroll,
-// top controls should hide when scrolling down.
-TEST_F(LayerTreeHostImplTopControlsTest, TopControlsScrollableSublayer) {
-  gfx::Size sub_content_size(100, 400);
-  gfx::Size sub_content_layer_size(100, 300);
-  SetupTopControlsAndScrollLayerWithVirtualViewport(
-      gfx::Size(100, 50), gfx::Size(100, 100), gfx::Size(100, 100));
-  DrawFrame();
-
-  // Show top controls
-  EXPECT_EQ(1.f, host_impl_->active_tree()->CurrentTopControlsShownRatio());
-
-  LayerImpl* outer_viewport_scroll_layer =
-      host_impl_->active_tree()->OuterViewportScrollLayer();
-  int id = outer_viewport_scroll_layer->id();
-
-  scoped_ptr<LayerImpl> child =
-      LayerImpl::Create(host_impl_->active_tree(), id + 2);
-  scoped_ptr<LayerImpl> child_clip =
-      LayerImpl::Create(host_impl_->active_tree(), id + 3);
-
-  child_clip->SetBounds(sub_content_layer_size);
-  child->SetScrollClipLayer(child_clip->id());
-  child->SetBounds(sub_content_size);
-  child->SetContentBounds(sub_content_size);
-  child->SetPosition(gfx::PointF());
-  child->SetDrawsContent(true);
-  child->SetIsContainerForFixedPositionLayers(true);
-
-  // scroll child to limit
-  child->SetScrollDelta(gfx::Vector2dF(0, 100.f));
-  child_clip->AddChild(child.Pass());
-  outer_viewport_scroll_layer->AddChild(child_clip.Pass());
-
-  // Scroll 25px to hide top controls
-  gfx::Vector2dF scroll_delta(0.f, 25.f);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-  host_impl_->ScrollEnd();
-
-  // Top controls should be hidden
-  EXPECT_EQ(scroll_delta.y(),
-            top_controls_height_ -
-                host_impl_->top_controls_manager()->ContentTopOffset());
-}
-
-// Ensure setting the top controls position explicitly using the setters on the
-// TreeImpl correctly affects the top controls manager and viewport bounds.
-TEST_F(LayerTreeHostImplTopControlsTest, PositionTopControlsExplicitly) {
-  CreateHostImpl(settings_, CreateOutputSurface());
-  SetupTopControlsAndScrollLayer();
-  DrawFrame();
-
-  host_impl_->active_tree()->SetCurrentTopControlsShownRatio(0.f);
-  host_impl_->active_tree()->top_controls_shown_ratio()->PushFromMainThread(
-      30.f / top_controls_height_);
-  host_impl_->active_tree()->top_controls_shown_ratio()->PushPendingToActive();
-  EXPECT_FLOAT_EQ(30.f, host_impl_->top_controls_manager()->ContentTopOffset());
-  EXPECT_FLOAT_EQ(-20.f,
-                  host_impl_->top_controls_manager()->ControlsTopOffset());
-
-  host_impl_->active_tree()->SetCurrentTopControlsShownRatio(0.f);
-  EXPECT_FLOAT_EQ(0.f, host_impl_->top_controls_manager()->ContentTopOffset());
-  EXPECT_FLOAT_EQ(-50.f,
-                  host_impl_->top_controls_manager()->ControlsTopOffset());
-
-  host_impl_->DidChangeTopControlsPosition();
-
-  // Now that top controls have moved, expect the clip to resize.
-  LayerImpl* root_clip_ptr = host_impl_->active_tree()->root_layer();
-  EXPECT_EQ(viewport_size_, root_clip_ptr->bounds());
-}
-
-// Test that the top_controls delta and sent delta are appropriately
-// applied on sync tree activation. The total top controls offset shouldn't
-// change after the activation.
-TEST_F(LayerTreeHostImplTopControlsTest, ApplyDeltaOnTreeActivation) {
-  CreateHostImpl(settings_, CreateOutputSurface());
-  SetupTopControlsAndScrollLayer();
-  DrawFrame();
-
-  host_impl_->active_tree()->top_controls_shown_ratio()->PushFromMainThread(
-      20.f / top_controls_height_);
-  host_impl_->active_tree()->top_controls_shown_ratio()->PushPendingToActive();
-  host_impl_->active_tree()->SetCurrentTopControlsShownRatio(
-      15.f / top_controls_height_);
-  host_impl_->active_tree()
-      ->top_controls_shown_ratio()
-      ->PullDeltaForMainThread();
-  host_impl_->active_tree()->SetCurrentTopControlsShownRatio(0.f);
-  host_impl_->sync_tree()->PushTopControlsFromMainThread(15.f /
-                                                         top_controls_height_);
-
-  host_impl_->DidChangeTopControlsPosition();
-  LayerImpl* root_clip_ptr = host_impl_->active_tree()->root_layer();
-  EXPECT_EQ(viewport_size_, root_clip_ptr->bounds());
-  EXPECT_EQ(0.f, host_impl_->top_controls_manager()->ContentTopOffset());
-
-  host_impl_->ActivateSyncTree();
-
-  root_clip_ptr = host_impl_->active_tree()->root_layer();
-  EXPECT_EQ(0.f, host_impl_->top_controls_manager()->ContentTopOffset());
-  EXPECT_EQ(viewport_size_, root_clip_ptr->bounds());
-
-  EXPECT_FLOAT_EQ(
-      -15.f, host_impl_->active_tree()->top_controls_shown_ratio()->Delta() *
-                 top_controls_height_);
-  EXPECT_FLOAT_EQ(
-      15.f,
-      host_impl_->active_tree()->top_controls_shown_ratio()->ActiveBase() *
-          top_controls_height_);
-}
-
-// Test that changing the top controls layout height is correctly applied to
-// the inner viewport container bounds. That is, the top controls layout
-// height is the amount that the inner viewport container was shrunk outside
-// the compositor to accommodate the top controls.
-TEST_F(LayerTreeHostImplTopControlsTest, TopControlsLayoutHeightChanged) {
-  CreateHostImpl(settings_, CreateOutputSurface());
-  SetupTopControlsAndScrollLayer();
-  DrawFrame();
-
-  host_impl_->sync_tree()->PushTopControlsFromMainThread(1.f);
-  host_impl_->sync_tree()->set_top_controls_shrink_blink_size(true);
-
-  host_impl_->active_tree()->top_controls_shown_ratio()->PushFromMainThread(
-      1.f);
-  host_impl_->active_tree()->top_controls_shown_ratio()->PushPendingToActive();
-  host_impl_->active_tree()->SetCurrentTopControlsShownRatio(0.f);
-
-  host_impl_->DidChangeTopControlsPosition();
-  LayerImpl* root_clip_ptr = host_impl_->active_tree()->root_layer();
-  EXPECT_EQ(viewport_size_, root_clip_ptr->bounds());
-  EXPECT_EQ(0.f, host_impl_->top_controls_manager()->ContentTopOffset());
-
-  host_impl_->sync_tree()->root_layer()->SetBounds(
-      gfx::Size(root_clip_ptr->bounds().width(),
-                root_clip_ptr->bounds().height() - 50.f));
-
-  host_impl_->ActivateSyncTree();
-
-  root_clip_ptr = host_impl_->active_tree()->root_layer();
-  EXPECT_EQ(0.f, host_impl_->top_controls_manager()->ContentTopOffset());
-
-  // The total bounds should remain unchanged since the bounds delta should
-  // account for the difference between the layout height and the current
-  // top controls offset.
-  EXPECT_EQ(viewport_size_, root_clip_ptr->bounds());
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(0.f, 50.f), root_clip_ptr->bounds_delta());
-
-  host_impl_->active_tree()->SetCurrentTopControlsShownRatio(1.f);
-  host_impl_->DidChangeTopControlsPosition();
-
-  EXPECT_EQ(1.f, host_impl_->top_controls_manager()->TopControlsShownRatio());
-  EXPECT_EQ(50.f, host_impl_->top_controls_manager()->TopControlsHeight());
-  EXPECT_EQ(50.f, host_impl_->top_controls_manager()->ContentTopOffset());
-  EXPECT_VECTOR_EQ(gfx::Vector2dF(0.f, 0.f), root_clip_ptr->bounds_delta());
-  EXPECT_EQ(gfx::Size(viewport_size_.width(), viewport_size_.height() - 50.f),
-            root_clip_ptr->bounds());
-}
-
-// Test that showing/hiding the top controls when the viewport is fully scrolled
-// doesn't incorrectly change the viewport offset due to clamping from changing
-// viewport bounds.
-TEST_F(LayerTreeHostImplTopControlsTest, TopControlsViewportOffsetClamping) {
-  SetupTopControlsAndScrollLayerWithVirtualViewport(
-      gfx::Size(100, 100), gfx::Size(200, 200), gfx::Size(200, 400));
-  DrawFrame();
-
-  EXPECT_EQ(1.f, host_impl_->active_tree()->CurrentTopControlsShownRatio());
-
-  LayerImpl* outer_scroll = host_impl_->OuterViewportScrollLayer();
-  LayerImpl* inner_scroll = host_impl_->InnerViewportScrollLayer();
-
-  // Scroll the viewports to max scroll offset.
-  outer_scroll->SetScrollDelta(gfx::Vector2dF(0, 200.f));
-  inner_scroll->SetScrollDelta(gfx::Vector2dF(100, 100.f));
-
-  gfx::ScrollOffset viewport_offset =
-      host_impl_->active_tree()->TotalScrollOffset();
-  EXPECT_EQ(host_impl_->active_tree()->TotalMaxScrollOffset(), viewport_offset);
-
-  // Hide the top controls by 25px.
-  gfx::Vector2dF scroll_delta(0.f, 25.f);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-
-  // scrolling down at the max extents no longer hides the top controls
-  EXPECT_EQ(1.f, host_impl_->active_tree()->CurrentTopControlsShownRatio());
-
-  // forcefully hide the top controls by 25px
-  host_impl_->top_controls_manager()->ScrollBy(scroll_delta);
-  host_impl_->ScrollEnd();
-
-  EXPECT_FLOAT_EQ(scroll_delta.y(),
-                  top_controls_height_ -
-                      host_impl_->top_controls_manager()->ContentTopOffset());
-
-  inner_scroll->ClampScrollToMaxScrollOffset();
-  outer_scroll->ClampScrollToMaxScrollOffset();
-
-  // We should still be fully scrolled.
-  EXPECT_EQ(host_impl_->active_tree()->TotalMaxScrollOffset(),
-            host_impl_->active_tree()->TotalScrollOffset());
-
-  viewport_offset = host_impl_->active_tree()->TotalScrollOffset();
-
-  // Bring the top controls down by 25px.
-  scroll_delta = gfx::Vector2dF(0.f, -25.f);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-  host_impl_->ScrollEnd();
-
-  // The viewport offset shouldn't have changed.
-  EXPECT_EQ(viewport_offset,
-            host_impl_->active_tree()->TotalScrollOffset());
-
-  // Scroll the viewports to max scroll offset.
-  outer_scroll->SetScrollDelta(gfx::Vector2dF(0, 200.f));
-  inner_scroll->SetScrollDelta(gfx::Vector2dF(100, 100.f));
-  EXPECT_EQ(host_impl_->active_tree()->TotalMaxScrollOffset(),
-            host_impl_->active_tree()->TotalScrollOffset());
-}
-
-// Test that the top controls coming in and out maintains the same aspect ratio
-// between the inner and outer viewports.
-TEST_F(LayerTreeHostImplTopControlsTest, TopControlsAspectRatio) {
-  SetupTopControlsAndScrollLayerWithVirtualViewport(
-      gfx::Size(100, 100), gfx::Size(200, 200), gfx::Size(200, 400));
-  DrawFrame();
-
-  EXPECT_FLOAT_EQ(top_controls_height_,
-                  host_impl_->top_controls_manager()->ContentTopOffset());
-
-  gfx::Vector2dF scroll_delta(0.f, 25.f);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-  host_impl_->ScrollEnd();
-
-  EXPECT_FLOAT_EQ(scroll_delta.y(),
-                  top_controls_height_ -
-                      host_impl_->top_controls_manager()->ContentTopOffset());
-
-  // Top controls were hidden by 25px so the inner viewport should have expanded
-  // by that much.
-  LayerImpl* outer_container =
-            host_impl_->active_tree()->OuterViewportContainerLayer();
-  LayerImpl* inner_container =
-            host_impl_->active_tree()->InnerViewportContainerLayer();
-  EXPECT_EQ(gfx::Size(100, 100+25), inner_container->BoundsForScrolling());
-
-  // Outer viewport should match inner's aspect ratio. The bounds are ceiled.
-  float aspect_ratio = inner_container->BoundsForScrolling().width() /
-                       inner_container->BoundsForScrolling().height();
-  gfx::Size expected = gfx::ToCeiledSize(gfx::SizeF(200, 200 / aspect_ratio));
-  EXPECT_EQ(expected, outer_container->BoundsForScrolling());
-  EXPECT_EQ(expected,
-            host_impl_->InnerViewportScrollLayer()->BoundsForScrolling());
-}
-
-// Test that scrolling the outer viewport affects the top controls.
-TEST_F(LayerTreeHostImplTopControlsTest, TopControlsScrollOuterViewport) {
-  SetupTopControlsAndScrollLayerWithVirtualViewport(
-      gfx::Size(100, 100), gfx::Size(200, 200), gfx::Size(200, 400));
-  DrawFrame();
-
-  EXPECT_EQ(top_controls_height_,
-            host_impl_->top_controls_manager()->ContentTopOffset());
-
-  // Send a gesture scroll that will scroll the outer viewport, make sure the
-  // top controls get scrolled.
-  gfx::Vector2dF scroll_delta(0.f, 15.f);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-  EXPECT_EQ(host_impl_->OuterViewportScrollLayer(),
-            host_impl_->CurrentlyScrollingLayer());
-  host_impl_->ScrollEnd();
-
-  EXPECT_FLOAT_EQ(scroll_delta.y(),
-                  top_controls_height_ -
-                      host_impl_->top_controls_manager()->ContentTopOffset());
-
-  scroll_delta = gfx::Vector2dF(0.f, 50.f);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-
-  EXPECT_EQ(0, host_impl_->top_controls_manager()->ContentTopOffset());
-  EXPECT_EQ(host_impl_->OuterViewportScrollLayer(),
-            host_impl_->CurrentlyScrollingLayer());
-
-  host_impl_->ScrollEnd();
-
-  // Position the viewports such that the inner viewport will be scrolled.
-  gfx::Vector2dF inner_viewport_offset(0.f, 25.f);
-  host_impl_->OuterViewportScrollLayer()->SetScrollDelta(gfx::Vector2dF());
-  host_impl_->InnerViewportScrollLayer()->SetScrollDelta(inner_viewport_offset);
-
-  scroll_delta = gfx::Vector2dF(0.f, -65.f);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-
-  EXPECT_EQ(top_controls_height_,
-            host_impl_->top_controls_manager()->ContentTopOffset());
-  EXPECT_FLOAT_EQ(
-      inner_viewport_offset.y() + (scroll_delta.y() + top_controls_height_),
-      host_impl_->InnerViewportScrollLayer()->ScrollDelta().y());
-
-  host_impl_->ScrollEnd();
-}
-
-TEST_F(LayerTreeHostImplTopControlsTest,
-       ScrollNonScrollableRootWithTopControls) {
-  CreateHostImpl(settings_, CreateOutputSurface());
-  SetupTopControlsAndScrollLayer();
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-
-  host_impl_->top_controls_manager()->ScrollBegin();
-  host_impl_->top_controls_manager()->ScrollBy(gfx::Vector2dF(0.f, 50.f));
-  host_impl_->top_controls_manager()->ScrollEnd();
-  EXPECT_EQ(0.f, host_impl_->top_controls_manager()->ContentTopOffset());
-  // Now that top controls have moved, expect the clip to resize.
-  LayerImpl* root_clip_ptr = host_impl_->active_tree()->root_layer();
-  EXPECT_EQ(viewport_size_, root_clip_ptr->bounds());
-
-  host_impl_->ScrollEnd();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-
-  float scroll_increment_y = -25.f;
-  host_impl_->top_controls_manager()->ScrollBegin();
-  host_impl_->top_controls_manager()->ScrollBy(
-      gfx::Vector2dF(0.f, scroll_increment_y));
-  EXPECT_FLOAT_EQ(-scroll_increment_y,
-                  host_impl_->top_controls_manager()->ContentTopOffset());
-  // Now that top controls have moved, expect the clip to resize.
-  EXPECT_EQ(gfx::Size(viewport_size_.width(),
-                      viewport_size_.height() + scroll_increment_y),
-            root_clip_ptr->bounds());
-
-  host_impl_->top_controls_manager()->ScrollBy(
-      gfx::Vector2dF(0.f, scroll_increment_y));
-  host_impl_->top_controls_manager()->ScrollEnd();
-  EXPECT_FLOAT_EQ(-2 * scroll_increment_y,
-                  host_impl_->top_controls_manager()->ContentTopOffset());
-  // Now that top controls have moved, expect the clip to resize.
-  EXPECT_EQ(clip_size_, root_clip_ptr->bounds());
-
-  host_impl_->ScrollEnd();
-
-  // Verify the layer is once-again non-scrollable.
-  EXPECT_EQ(
-      gfx::ScrollOffset(),
-      host_impl_->active_tree()->InnerViewportScrollLayer()->MaxScrollOffset());
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollNonCompositedRoot) {
-  // Test the configuration where a non-composited root layer is embedded in a
-  // scrollable outer layer.
-  gfx::Size surface_size(10, 10);
-  gfx::Size contents_size(20, 20);
-
-  scoped_ptr<LayerImpl> content_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 1);
-  content_layer->SetDrawsContent(true);
-  content_layer->SetPosition(gfx::PointF());
-  content_layer->SetBounds(contents_size);
-  content_layer->SetContentBounds(contents_size);
-  content_layer->SetContentsScale(2.f, 2.f);
-
-  scoped_ptr<LayerImpl> scroll_clip_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  scroll_clip_layer->SetBounds(surface_size);
-
-  scoped_ptr<LayerImpl> scroll_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 2);
-  scroll_layer->SetScrollClipLayer(3);
-  scroll_layer->SetBounds(contents_size);
-  scroll_layer->SetContentBounds(contents_size);
-  scroll_layer->SetPosition(gfx::PointF());
-  scroll_layer->AddChild(content_layer.Pass());
-  scroll_clip_layer->AddChild(scroll_layer.Pass());
-
-  scroll_clip_layer->SetHasRenderSurface(true);
-  host_impl_->active_tree()->SetRootLayer(scroll_clip_layer.Pass());
-  host_impl_->SetViewportSize(surface_size);
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(5, 5), InputHandler::WHEEL));
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10));
-  host_impl_->ScrollEnd();
-  EXPECT_TRUE(did_request_redraw_);
-  EXPECT_TRUE(did_request_commit_);
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollChildCallsCommitAndRedraw) {
-  gfx::Size surface_size(10, 10);
-  gfx::Size contents_size(20, 20);
-  scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl_->active_tree(), 1);
-  root->SetBounds(surface_size);
-  root->SetContentBounds(contents_size);
-  root->AddChild(CreateScrollableLayer(2, contents_size, root.get()));
-  root->SetHasRenderSurface(true);
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-  host_impl_->SetViewportSize(surface_size);
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(5, 5), InputHandler::WHEEL));
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10));
-  host_impl_->ScrollEnd();
-  EXPECT_TRUE(did_request_redraw_);
-  EXPECT_TRUE(did_request_commit_);
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollMissesChild) {
-  gfx::Size surface_size(10, 10);
-  scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl_->active_tree(), 1);
-  root->AddChild(CreateScrollableLayer(2, surface_size, root.get()));
-  root->SetHasRenderSurface(true);
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-  host_impl_->SetViewportSize(surface_size);
-  DrawFrame();
-
-  // Scroll event is ignored because the input coordinate is outside the layer
-  // boundaries.
-  EXPECT_EQ(InputHandler::SCROLL_IGNORED,
-            host_impl_->ScrollBegin(gfx::Point(15, 5), InputHandler::WHEEL));
-  EXPECT_FALSE(did_request_redraw_);
-  EXPECT_FALSE(did_request_commit_);
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollMissesBackfacingChild) {
-  gfx::Size surface_size(10, 10);
-  scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl_->active_tree(), 1);
-  root->SetHasRenderSurface(true);
-  scoped_ptr<LayerImpl> child =
-      CreateScrollableLayer(2, surface_size, root.get());
-  host_impl_->SetViewportSize(surface_size);
-
-  gfx::Transform matrix;
-  matrix.RotateAboutXAxis(180.0);
-  child->SetTransform(matrix);
-  child->SetDoubleSided(false);
-
-  root->AddChild(child.Pass());
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-  DrawFrame();
-
-  // Scroll event is ignored because the scrollable layer is not facing the
-  // viewer and there is nothing scrollable behind it.
-  EXPECT_EQ(InputHandler::SCROLL_IGNORED,
-            host_impl_->ScrollBegin(gfx::Point(5, 5), InputHandler::WHEEL));
-  EXPECT_FALSE(did_request_redraw_);
-  EXPECT_FALSE(did_request_commit_);
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollBlockedByContentLayer) {
-  gfx::Size surface_size(10, 10);
-  scoped_ptr<LayerImpl> clip_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  scoped_ptr<LayerImpl> content_layer =
-      CreateScrollableLayer(1, surface_size, clip_layer.get());
-  content_layer->SetShouldScrollOnMainThread(true);
-  content_layer->SetScrollClipLayer(Layer::INVALID_ID);
-
-  // Note: we can use the same clip layer for both since both calls to
-  // CreateScrollableLayer() use the same surface size.
-  scoped_ptr<LayerImpl> scroll_layer =
-      CreateScrollableLayer(2, surface_size, clip_layer.get());
-  scroll_layer->AddChild(content_layer.Pass());
-  clip_layer->AddChild(scroll_layer.Pass());
-  clip_layer->SetHasRenderSurface(true);
-
-  host_impl_->active_tree()->SetRootLayer(clip_layer.Pass());
-  host_impl_->SetViewportSize(surface_size);
-  DrawFrame();
-
-  // Scrolling fails because the content layer is asking to be scrolled on the
-  // main thread.
-  EXPECT_EQ(InputHandler::SCROLL_ON_MAIN_THREAD,
-            host_impl_->ScrollBegin(gfx::Point(5, 5), InputHandler::WHEEL));
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollRootAndChangePageScaleOnMainThread) {
-  gfx::Size surface_size(20, 20);
-  gfx::Size viewport_size(10, 10);
-  float page_scale = 2.f;
-  scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl_->active_tree(), 1);
-  scoped_ptr<LayerImpl> root_clip =
-      LayerImpl::Create(host_impl_->active_tree(), 2);
-  scoped_ptr<LayerImpl> root_scrolling =
-      CreateScrollableLayer(3, surface_size, root_clip.get());
-  EXPECT_EQ(viewport_size, root_clip->bounds());
-  root_scrolling->SetIsContainerForFixedPositionLayers(true);
-  root_clip->AddChild(root_scrolling.Pass());
-  root->AddChild(root_clip.Pass());
-  root->SetHasRenderSurface(true);
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-  // The behaviour in this test assumes the page scale is applied at a layer
-  // above the clip layer.
-  host_impl_->active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 1, 3,
-                                                      Layer::INVALID_ID);
-  host_impl_->active_tree()->DidBecomeActive();
-  host_impl_->SetViewportSize(viewport_size);
-  DrawFrame();
-
-  LayerImpl* root_scroll =
-      host_impl_->active_tree()->InnerViewportScrollLayer();
-  EXPECT_EQ(viewport_size, root_scroll->scroll_clip_layer()->bounds());
-
-  gfx::Vector2d scroll_delta(0, 10);
-  gfx::Vector2d expected_scroll_delta = scroll_delta;
-  gfx::ScrollOffset expected_max_scroll = root_scroll->MaxScrollOffset();
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(5, 5), InputHandler::WHEEL));
-  host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-  host_impl_->ScrollEnd();
-
-  // Set new page scale from main thread.
-  host_impl_->active_tree()->PushPageScaleFromMainThread(page_scale, page_scale,
-                                                         page_scale);
-
-  scoped_ptr<ScrollAndScaleSet> scroll_info = host_impl_->ProcessScrollDeltas();
-  ExpectContains(*scroll_info.get(), root_scroll->id(), expected_scroll_delta);
-
-  // The scroll range should also have been updated.
-  EXPECT_EQ(expected_max_scroll, root_scroll->MaxScrollOffset());
-
-  // The page scale delta remains constant because the impl thread did not
-  // scale.
-  EXPECT_EQ(1.f, host_impl_->active_tree()->page_scale_delta());
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollRootAndChangePageScaleOnImplThread) {
-  gfx::Size surface_size(20, 20);
-  gfx::Size viewport_size(10, 10);
-  float page_scale = 2.f;
-  scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl_->active_tree(), 1);
-  scoped_ptr<LayerImpl> root_clip =
-      LayerImpl::Create(host_impl_->active_tree(), 2);
-  scoped_ptr<LayerImpl> root_scrolling =
-      CreateScrollableLayer(3, surface_size, root_clip.get());
-  EXPECT_EQ(viewport_size, root_clip->bounds());
-  root_scrolling->SetIsContainerForFixedPositionLayers(true);
-  root_clip->AddChild(root_scrolling.Pass());
-  root->AddChild(root_clip.Pass());
-  root->SetHasRenderSurface(true);
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-  // The behaviour in this test assumes the page scale is applied at a layer
-  // above the clip layer.
-  host_impl_->active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 1, 3,
-                                                      Layer::INVALID_ID);
-  host_impl_->active_tree()->DidBecomeActive();
-  host_impl_->SetViewportSize(viewport_size);
-  host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, 1.f, page_scale);
-  DrawFrame();
-
-  LayerImpl* root_scroll =
-      host_impl_->active_tree()->InnerViewportScrollLayer();
-  EXPECT_EQ(viewport_size, root_scroll->scroll_clip_layer()->bounds());
-
-  gfx::Vector2d scroll_delta(0, 10);
-  gfx::Vector2d expected_scroll_delta = scroll_delta;
-  gfx::ScrollOffset expected_max_scroll = root_scroll->MaxScrollOffset();
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(5, 5), InputHandler::WHEEL));
-  host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-  host_impl_->ScrollEnd();
-
-  // Set new page scale on impl thread by pinching.
-  host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE);
-  host_impl_->PinchGestureBegin();
-  host_impl_->PinchGestureUpdate(page_scale, gfx::Point());
-  host_impl_->PinchGestureEnd();
-  host_impl_->ScrollEnd();
-  DrawOneFrame();
-
-  // The scroll delta is not scaled because the main thread did not scale.
-  scoped_ptr<ScrollAndScaleSet> scroll_info = host_impl_->ProcessScrollDeltas();
-  ExpectContains(*scroll_info.get(), root_scroll->id(), expected_scroll_delta);
-
-  // The scroll range should also have been updated.
-  EXPECT_EQ(expected_max_scroll, root_scroll->MaxScrollOffset());
-
-  // The page scale delta should match the new scale on the impl side.
-  EXPECT_EQ(page_scale, host_impl_->active_tree()->current_page_scale_factor());
-}
-
-TEST_F(LayerTreeHostImplTest, PageScaleDeltaAppliedToRootScrollLayerOnly) {
-  gfx::Size surface_size(10, 10);
-  float default_page_scale = 1.f;
-  gfx::Transform default_page_scale_matrix;
-  default_page_scale_matrix.Scale(default_page_scale, default_page_scale);
-
-  float new_page_scale = 2.f;
-  gfx::Transform new_page_scale_matrix;
-  new_page_scale_matrix.Scale(new_page_scale, new_page_scale);
-
-  // Create a normal scrollable root layer and another scrollable child layer.
-  LayerImpl* scroll = SetupScrollAndContentsLayers(surface_size);
-  LayerImpl* root = host_impl_->active_tree()->root_layer();
-  LayerImpl* child = scroll->children()[0];
-
-  scoped_ptr<LayerImpl> scrollable_child_clip =
-      LayerImpl::Create(host_impl_->active_tree(), 6);
-  scoped_ptr<LayerImpl> scrollable_child =
-      CreateScrollableLayer(7, surface_size, scrollable_child_clip.get());
-  scrollable_child_clip->AddChild(scrollable_child.Pass());
-  child->AddChild(scrollable_child_clip.Pass());
-  LayerImpl* grand_child = child->children()[0];
-
-  // Set new page scale on impl thread by pinching.
-  host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE);
-  host_impl_->PinchGestureBegin();
-  host_impl_->PinchGestureUpdate(new_page_scale, gfx::Point());
-  host_impl_->PinchGestureEnd();
-  host_impl_->ScrollEnd();
-  DrawOneFrame();
-
-  EXPECT_EQ(1.f, root->contents_scale_x());
-  EXPECT_EQ(1.f, root->contents_scale_y());
-  EXPECT_EQ(1.f, scroll->contents_scale_x());
-  EXPECT_EQ(1.f, scroll->contents_scale_y());
-  EXPECT_EQ(1.f, child->contents_scale_x());
-  EXPECT_EQ(1.f, child->contents_scale_y());
-  EXPECT_EQ(1.f, grand_child->contents_scale_x());
-  EXPECT_EQ(1.f, grand_child->contents_scale_y());
-
-  // Make sure all the layers are drawn with the page scale delta applied, i.e.,
-  // the page scale delta on the root layer is applied hierarchically.
-  LayerTreeHostImpl::FrameData frame;
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-
-  EXPECT_EQ(1.f, root->draw_transform().matrix().getDouble(0, 0));
-  EXPECT_EQ(1.f, root->draw_transform().matrix().getDouble(1, 1));
-  EXPECT_EQ(new_page_scale, scroll->draw_transform().matrix().getDouble(0, 0));
-  EXPECT_EQ(new_page_scale, scroll->draw_transform().matrix().getDouble(1, 1));
-  EXPECT_EQ(new_page_scale, child->draw_transform().matrix().getDouble(0, 0));
-  EXPECT_EQ(new_page_scale, child->draw_transform().matrix().getDouble(1, 1));
-  EXPECT_EQ(new_page_scale,
-            grand_child->draw_transform().matrix().getDouble(0, 0));
-  EXPECT_EQ(new_page_scale,
-            grand_child->draw_transform().matrix().getDouble(1, 1));
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollChildAndChangePageScaleOnMainThread) {
-  gfx::Size surface_size(30, 30);
-  scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl_->active_tree(), 1);
-  root->SetBounds(gfx::Size(5, 5));
-  root->SetHasRenderSurface(true);
-  scoped_ptr<LayerImpl> root_scrolling =
-      LayerImpl::Create(host_impl_->active_tree(), 2);
-  root_scrolling->SetBounds(surface_size);
-  root_scrolling->SetContentBounds(surface_size);
-  root_scrolling->SetScrollClipLayer(root->id());
-  root_scrolling->SetIsContainerForFixedPositionLayers(true);
-  LayerImpl* root_scrolling_ptr = root_scrolling.get();
-  root->AddChild(root_scrolling.Pass());
-  int child_scroll_layer_id = 3;
-  scoped_ptr<LayerImpl> child_scrolling = CreateScrollableLayer(
-      child_scroll_layer_id, surface_size, root_scrolling_ptr);
-  LayerImpl* child = child_scrolling.get();
-  root_scrolling_ptr->AddChild(child_scrolling.Pass());
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-  host_impl_->active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 1, 2,
-                                                      Layer::INVALID_ID);
-  host_impl_->active_tree()->DidBecomeActive();
-  host_impl_->SetViewportSize(surface_size);
-  DrawFrame();
-
-  gfx::Vector2d scroll_delta(0, 10);
-  gfx::Vector2d expected_scroll_delta(scroll_delta);
-  gfx::ScrollOffset expected_max_scroll(child->MaxScrollOffset());
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(5, 5), InputHandler::WHEEL));
-  host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-  host_impl_->ScrollEnd();
-
-  float page_scale = 2.f;
-  host_impl_->active_tree()->PushPageScaleFromMainThread(page_scale, 1.f,
-                                                         page_scale);
-
-  DrawOneFrame();
-
-  scoped_ptr<ScrollAndScaleSet> scroll_info = host_impl_->ProcessScrollDeltas();
-  ExpectContains(
-      *scroll_info.get(), child_scroll_layer_id, expected_scroll_delta);
-
-  // The scroll range should not have changed.
-  EXPECT_EQ(child->MaxScrollOffset(), expected_max_scroll);
-
-  // The page scale delta remains constant because the impl thread did not
-  // scale.
-  EXPECT_EQ(1.f, host_impl_->active_tree()->page_scale_delta());
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollChildBeyondLimit) {
-  // Scroll a child layer beyond its maximum scroll range and make sure the
-  // parent layer is scrolled on the axis on which the child was unable to
-  // scroll.
-  gfx::Size surface_size(10, 10);
-  gfx::Size content_size(20, 20);
-  scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl_->active_tree(), 1);
-  root->SetBounds(surface_size);
-  root->SetHasRenderSurface(true);
-  scoped_ptr<LayerImpl> grand_child =
-      CreateScrollableLayer(3, content_size, root.get());
-
-  scoped_ptr<LayerImpl> child =
-      CreateScrollableLayer(2, content_size, root.get());
-  LayerImpl* grand_child_layer = grand_child.get();
-  child->AddChild(grand_child.Pass());
-
-  LayerImpl* child_layer = child.get();
-  root->AddChild(child.Pass());
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-  host_impl_->active_tree()->DidBecomeActive();
-  host_impl_->SetViewportSize(surface_size);
-  grand_child_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(0, 5));
-  child_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(3, 0));
-
-  DrawFrame();
-  {
-    gfx::Vector2d scroll_delta(-8, -7);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    host_impl_->ScrollEnd();
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-
-    // The grand child should have scrolled up to its limit.
-    LayerImpl* child = host_impl_->active_tree()->root_layer()->children()[0];
-    LayerImpl* grand_child = child->children()[0];
-    ExpectContains(*scroll_info.get(), grand_child->id(), gfx::Vector2d(0, -5));
-
-    // The child should have only scrolled on the other axis.
-    ExpectContains(*scroll_info.get(), child->id(), gfx::Vector2d(-3, 0));
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollWithoutBubbling) {
-  // Scroll a child layer beyond its maximum scroll range and make sure the
-  // the scroll doesn't bubble up to the parent layer.
-  gfx::Size surface_size(20, 20);
-  gfx::Size viewport_size(10, 10);
-  scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl_->active_tree(), 1);
-  root->SetHasRenderSurface(true);
-  scoped_ptr<LayerImpl> root_scrolling =
-      CreateScrollableLayer(2, surface_size, root.get());
-  root_scrolling->SetIsContainerForFixedPositionLayers(true);
-
-  scoped_ptr<LayerImpl> grand_child =
-      CreateScrollableLayer(4, surface_size, root.get());
-
-  scoped_ptr<LayerImpl> child =
-      CreateScrollableLayer(3, surface_size, root.get());
-  LayerImpl* grand_child_layer = grand_child.get();
-  child->AddChild(grand_child.Pass());
-
-  LayerImpl* child_layer = child.get();
-  root_scrolling->AddChild(child.Pass());
-  root->AddChild(root_scrolling.Pass());
-  EXPECT_EQ(viewport_size, root->bounds());
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-  host_impl_->active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 1, 2,
-                                                      Layer::INVALID_ID);
-  host_impl_->active_tree()->DidBecomeActive();
-  host_impl_->SetViewportSize(viewport_size);
-
-  grand_child_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(0, 2));
-  child_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(0, 3));
-
-  DrawFrame();
-  {
-    gfx::Vector2d scroll_delta(0, -10);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(),
-                                      InputHandler::NON_BUBBLING_GESTURE));
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    host_impl_->ScrollEnd();
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-
-    // The grand child should have scrolled up to its limit.
-    LayerImpl* child =
-        host_impl_->active_tree()->root_layer()->children()[0]->children()[0];
-    LayerImpl* grand_child = child->children()[0];
-    ExpectContains(*scroll_info.get(), grand_child->id(), gfx::Vector2d(0, -2));
-
-    // The child should not have scrolled.
-    ExpectNone(*scroll_info.get(), child->id());
-
-    // The next time we scroll we should only scroll the parent.
-    scroll_delta = gfx::Vector2d(0, -3);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(5, 5),
-                                      InputHandler::NON_BUBBLING_GESTURE));
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), grand_child);
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), child);
-    host_impl_->ScrollEnd();
-
-    scroll_info = host_impl_->ProcessScrollDeltas();
-
-    // The child should have scrolled up to its limit.
-    ExpectContains(*scroll_info.get(), child->id(), gfx::Vector2d(0, -3));
-
-    // The grand child should not have scrolled.
-    ExpectContains(*scroll_info.get(), grand_child->id(), gfx::Vector2d(0, -2));
-
-    // After scrolling the parent, another scroll on the opposite direction
-    // should still scroll the child.
-    scroll_delta = gfx::Vector2d(0, 7);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(5, 5),
-                                      InputHandler::NON_BUBBLING_GESTURE));
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), grand_child);
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), grand_child);
-    host_impl_->ScrollEnd();
-
-    scroll_info = host_impl_->ProcessScrollDeltas();
-
-    // The grand child should have scrolled.
-    ExpectContains(*scroll_info.get(), grand_child->id(), gfx::Vector2d(0, 5));
-
-    // The child should not have scrolled.
-    ExpectContains(*scroll_info.get(), child->id(), gfx::Vector2d(0, -3));
-
-
-    // Scrolling should be adjusted from viewport space.
-    host_impl_->active_tree()->PushPageScaleFromMainThread(2.f, 2.f, 2.f);
-    host_impl_->SetPageScaleOnActiveTree(2.f);
-
-    scroll_delta = gfx::Vector2d(0, -2);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(1, 1),
-                                      InputHandler::NON_BUBBLING_GESTURE));
-    EXPECT_EQ(grand_child, host_impl_->CurrentlyScrollingLayer());
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    host_impl_->ScrollEnd();
-
-    scroll_info = host_impl_->ProcessScrollDeltas();
-
-    // Should have scrolled by half the amount in layer space (5 - 2/2)
-    ExpectContains(*scroll_info.get(), grand_child->id(), gfx::Vector2d(0, 4));
-  }
-}
-TEST_F(LayerTreeHostImplTest, ScrollEventBubbling) {
-  // When we try to scroll a non-scrollable child layer, the scroll delta
-  // should be applied to one of its ancestors if possible.
-  gfx::Size surface_size(10, 10);
-  gfx::Size content_size(20, 20);
-  scoped_ptr<LayerImpl> root_clip =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  root_clip->SetHasRenderSurface(true);
-  scoped_ptr<LayerImpl> root =
-      CreateScrollableLayer(1, content_size, root_clip.get());
-  // Make 'root' the clip layer for child: since they have the same sizes the
-  // child will have zero max_scroll_offset and scrolls will bubble.
-  scoped_ptr<LayerImpl> child =
-      CreateScrollableLayer(2, content_size, root.get());
-  child->SetIsContainerForFixedPositionLayers(true);
-  root->SetBounds(content_size);
-
-  int root_scroll_id = root->id();
-  root->AddChild(child.Pass());
-  root_clip->AddChild(root.Pass());
-
-  host_impl_->SetViewportSize(surface_size);
-  host_impl_->active_tree()->SetRootLayer(root_clip.Pass());
-  host_impl_->active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 3, 2,
-                                                      Layer::INVALID_ID);
-  host_impl_->active_tree()->DidBecomeActive();
-  DrawFrame();
-  {
-    gfx::Vector2d scroll_delta(0, 4);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(5, 5), InputHandler::WHEEL));
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    host_impl_->ScrollEnd();
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-
-    // Only the root scroll should have scrolled.
-    ASSERT_EQ(scroll_info->scrolls.size(), 1u);
-    ExpectContains(*scroll_info.get(), root_scroll_id, scroll_delta);
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollBeforeRedraw) {
-  gfx::Size surface_size(10, 10);
-  scoped_ptr<LayerImpl> root_clip =
-      LayerImpl::Create(host_impl_->active_tree(), 1);
-  scoped_ptr<LayerImpl> root_scroll =
-      CreateScrollableLayer(2, surface_size, root_clip.get());
-  root_scroll->SetIsContainerForFixedPositionLayers(true);
-  root_clip->SetHasRenderSurface(true);
-  root_clip->AddChild(root_scroll.Pass());
-  host_impl_->active_tree()->SetRootLayer(root_clip.Pass());
-  host_impl_->active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 1, 2,
-                                                      Layer::INVALID_ID);
-  host_impl_->active_tree()->DidBecomeActive();
-  host_impl_->SetViewportSize(surface_size);
-
-  // Draw one frame and then immediately rebuild the layer tree to mimic a tree
-  // synchronization.
-  DrawFrame();
-  host_impl_->active_tree()->DetachLayerTree();
-  scoped_ptr<LayerImpl> root_clip2 =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  scoped_ptr<LayerImpl> root_scroll2 =
-      CreateScrollableLayer(4, surface_size, root_clip2.get());
-  root_scroll2->SetIsContainerForFixedPositionLayers(true);
-  root_clip2->AddChild(root_scroll2.Pass());
-  root_clip2->SetHasRenderSurface(true);
-  host_impl_->active_tree()->SetRootLayer(root_clip2.Pass());
-  host_impl_->active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 3, 4,
-                                                      Layer::INVALID_ID);
-  host_impl_->active_tree()->DidBecomeActive();
-
-  // Scrolling should still work even though we did not draw yet.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(5, 5), InputHandler::WHEEL));
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollAxisAlignedRotatedLayer) {
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(100, 100));
-
-  // Rotate the root layer 90 degrees counter-clockwise about its center.
-  gfx::Transform rotate_transform;
-  rotate_transform.Rotate(-90.0);
-  host_impl_->active_tree()->root_layer()->SetTransform(rotate_transform);
-
-  gfx::Size surface_size(50, 50);
-  host_impl_->SetViewportSize(surface_size);
-  DrawFrame();
-
-  // Scroll to the right in screen coordinates with a gesture.
-  gfx::Vector2d gesture_scroll_delta(10, 0);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollBy(gfx::Point(), gesture_scroll_delta);
-  host_impl_->ScrollEnd();
-
-  // The layer should have scrolled down in its local coordinates.
-  scoped_ptr<ScrollAndScaleSet> scroll_info = host_impl_->ProcessScrollDeltas();
-  ExpectContains(*scroll_info.get(), scroll_layer->id(),
-                 gfx::Vector2d(0, gesture_scroll_delta.x()));
-
-  // Reset and scroll down with the wheel.
-  scroll_layer->SetScrollDelta(gfx::Vector2dF());
-  gfx::Vector2d wheel_scroll_delta(0, 10);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-  host_impl_->ScrollBy(gfx::Point(), wheel_scroll_delta);
-  host_impl_->ScrollEnd();
-
-  // The layer should have scrolled down in its local coordinates.
-  scroll_info = host_impl_->ProcessScrollDeltas();
-  ExpectContains(*scroll_info.get(),
-                 scroll_layer->id(),
-                 wheel_scroll_delta);
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollNonAxisAlignedRotatedLayer) {
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  int child_clip_layer_id = 6;
-  int child_layer_id = 7;
-  float child_layer_angle = -20.f;
-
-  // Create a child layer that is rotated to a non-axis-aligned angle.
-  scoped_ptr<LayerImpl> clip_layer =
-      LayerImpl::Create(host_impl_->active_tree(), child_clip_layer_id);
-  scoped_ptr<LayerImpl> child = CreateScrollableLayer(
-      child_layer_id, scroll_layer->content_bounds(), clip_layer.get());
-  gfx::Transform rotate_transform;
-  rotate_transform.Translate(-50.0, -50.0);
-  rotate_transform.Rotate(child_layer_angle);
-  rotate_transform.Translate(50.0, 50.0);
-  clip_layer->SetTransform(rotate_transform);
-
-  // Only allow vertical scrolling.
-  clip_layer->SetBounds(
-      gfx::Size(child->bounds().width(), child->bounds().height() / 2));
-  // The rotation depends on the layer's transform origin, and the child layer
-  // is a different size than the clip, so make sure the clip layer's origin
-  // lines up over the child.
-  clip_layer->SetTransformOrigin(gfx::Point3F(
-      clip_layer->bounds().width() * 0.5f, clip_layer->bounds().height(), 0.f));
-  LayerImpl* child_ptr = child.get();
-  clip_layer->AddChild(child.Pass());
-  scroll_layer->AddChild(clip_layer.Pass());
-
-  gfx::Size surface_size(50, 50);
-  host_impl_->SetViewportSize(surface_size);
-  DrawFrame();
-  {
-    // Scroll down in screen coordinates with a gesture.
-    gfx::Vector2d gesture_scroll_delta(0, 10);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(1, 1), InputHandler::GESTURE));
-    host_impl_->ScrollBy(gfx::Point(), gesture_scroll_delta);
-    host_impl_->ScrollEnd();
-
-    // The child layer should have scrolled down in its local coordinates an
-    // amount proportional to the angle between it and the input scroll delta.
-    gfx::Vector2d expected_scroll_delta(
-        0, gesture_scroll_delta.y() *
-               std::cos(MathUtil::Deg2Rad(child_layer_angle)));
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-    ExpectContains(*scroll_info.get(), child_layer_id, expected_scroll_delta);
-
-    // The root scroll layer should not have scrolled, because the input delta
-    // was close to the layer's axis of movement.
-    EXPECT_EQ(scroll_info->scrolls.size(), 1u);
-  }
-  {
-    // Now reset and scroll the same amount horizontally.
-    child_ptr->SetScrollDelta(gfx::Vector2dF());
-    gfx::Vector2d gesture_scroll_delta(10, 0);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(1, 1), InputHandler::GESTURE));
-    host_impl_->ScrollBy(gfx::Point(), gesture_scroll_delta);
-    host_impl_->ScrollEnd();
-
-    // The child layer should have scrolled down in its local coordinates an
-    // amount proportional to the angle between it and the input scroll delta.
-    gfx::Vector2d expected_scroll_delta(
-        0, -gesture_scroll_delta.x() *
-               std::sin(MathUtil::Deg2Rad(child_layer_angle)));
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-    ExpectContains(*scroll_info.get(), child_layer_id, expected_scroll_delta);
-
-    // The root scroll layer should have scrolled more, since the input scroll
-    // delta was mostly orthogonal to the child layer's vertical scroll axis.
-    gfx::Vector2d expected_root_scroll_delta(
-        gesture_scroll_delta.x() *
-            std::pow(std::cos(MathUtil::Deg2Rad(child_layer_angle)), 2),
-        0);
-    ExpectContains(*scroll_info.get(),
-                   scroll_layer->id(),
-                   expected_root_scroll_delta);
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollScaledLayer) {
-  LayerImpl* scroll_layer =
-      SetupScrollAndContentsLayers(gfx::Size(100, 100));
-
-  // Scale the layer to twice its normal size.
-  int scale = 2;
-  gfx::Transform scale_transform;
-  scale_transform.Scale(scale, scale);
-  scroll_layer->SetTransform(scale_transform);
-
-  gfx::Size surface_size(50, 50);
-  host_impl_->SetViewportSize(surface_size);
-  DrawFrame();
-
-  // Scroll down in screen coordinates with a gesture.
-  gfx::Vector2d scroll_delta(0, 10);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-  host_impl_->ScrollEnd();
-
-  // The layer should have scrolled down in its local coordinates, but half the
-  // amount.
-  scoped_ptr<ScrollAndScaleSet> scroll_info = host_impl_->ProcessScrollDeltas();
-  ExpectContains(*scroll_info.get(),
-                 scroll_layer->id(),
-                 gfx::Vector2d(0, scroll_delta.y() / scale));
-
-  // Reset and scroll down with the wheel.
-  scroll_layer->SetScrollDelta(gfx::Vector2dF());
-  gfx::Vector2d wheel_scroll_delta(0, 10);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-  host_impl_->ScrollBy(gfx::Point(), wheel_scroll_delta);
-  host_impl_->ScrollEnd();
-
-  // It should apply the scale factor to the scroll delta for the wheel event.
-  scroll_info = host_impl_->ProcessScrollDeltas();
-  ExpectContains(*scroll_info.get(),
-                 scroll_layer->id(),
-                 wheel_scroll_delta);
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollViewportRounding) {
-  int width = 332;
-  int height = 20;
-  int scale = 3;
-  SetupScrollAndContentsLayers(gfx::Size(width, height));
-  host_impl_->active_tree()->InnerViewportContainerLayer()->SetBounds(
-      gfx::Size(width * scale - 1, height * scale));
-  host_impl_->SetDeviceScaleFactor(scale);
-  host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, 0.5f, 4.f);
-
-  LayerImpl* inner_viewport_scroll_layer =
-      host_impl_->active_tree()->InnerViewportScrollLayer();
-  EXPECT_EQ(gfx::ScrollOffset(0, 0),
-            inner_viewport_scroll_layer->MaxScrollOffset());
-}
-
-class TestScrollOffsetDelegate : public LayerScrollOffsetDelegate {
- public:
-  TestScrollOffsetDelegate()
-      : page_scale_factor_(0.f),
-        min_page_scale_factor_(-1.f),
-        max_page_scale_factor_(-1.f) {}
-
-  ~TestScrollOffsetDelegate() override {}
-
-  gfx::ScrollOffset GetTotalScrollOffset() override {
-    return getter_return_value_;
-  }
-
-  bool IsExternalFlingActive() const override { return false; }
-
-  void UpdateRootLayerState(const gfx::ScrollOffset& total_scroll_offset,
-                            const gfx::ScrollOffset& max_scroll_offset,
-                            const gfx::SizeF& scrollable_size,
-                            float page_scale_factor,
-                            float min_page_scale_factor,
-                            float max_page_scale_factor) override {
-    DCHECK(total_scroll_offset.x() <= max_scroll_offset.x());
-    DCHECK(total_scroll_offset.y() <= max_scroll_offset.y());
-    last_set_scroll_offset_ = total_scroll_offset;
-    max_scroll_offset_ = max_scroll_offset;
-    scrollable_size_ = scrollable_size;
-    page_scale_factor_ = page_scale_factor;
-    min_page_scale_factor_ = min_page_scale_factor;
-    max_page_scale_factor_ = max_page_scale_factor;
-
-    set_getter_return_value(last_set_scroll_offset_);
-  }
-
-  gfx::ScrollOffset last_set_scroll_offset() {
-    return last_set_scroll_offset_;
-  }
-
-  void set_getter_return_value(const gfx::ScrollOffset& value) {
-    getter_return_value_ = value;
-  }
-
-  gfx::ScrollOffset max_scroll_offset() const {
-    return max_scroll_offset_;
-  }
-
-  gfx::SizeF scrollable_size() const {
-    return scrollable_size_;
-  }
-
-  float page_scale_factor() const {
-    return page_scale_factor_;
-  }
-
-  float min_page_scale_factor() const {
-    return min_page_scale_factor_;
-  }
-
-  float max_page_scale_factor() const {
-    return max_page_scale_factor_;
-  }
-
- private:
-  gfx::ScrollOffset last_set_scroll_offset_;
-  gfx::ScrollOffset getter_return_value_;
-  gfx::ScrollOffset max_scroll_offset_;
-  gfx::SizeF scrollable_size_;
-  float page_scale_factor_;
-  float min_page_scale_factor_;
-  float max_page_scale_factor_;
-};
-
-TEST_F(LayerTreeHostImplTest, RootLayerScrollOffsetDelegation) {
-  TestScrollOffsetDelegate scroll_delegate;
-  host_impl_->SetViewportSize(gfx::Size(10, 20));
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  LayerImpl* clip_layer = scroll_layer->parent()->parent();
-  clip_layer->SetBounds(gfx::Size(10, 20));
-
-  // Setting the delegate results in the current scroll offset being set.
-  gfx::Vector2dF initial_scroll_delta(10.f, 10.f);
-  scroll_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset());
-  scroll_layer->SetScrollDelta(initial_scroll_delta);
-  host_impl_->SetRootLayerScrollOffsetDelegate(&scroll_delegate);
-  EXPECT_EQ(initial_scroll_delta.ToString(),
-            scroll_delegate.last_set_scroll_offset().ToString());
-
-  // Setting the delegate results in the scrollable_size, max_scroll_offset,
-  // page_scale_factor and {min|max}_page_scale_factor being set.
-  EXPECT_EQ(gfx::SizeF(100, 100), scroll_delegate.scrollable_size());
-  EXPECT_EQ(gfx::ScrollOffset(90, 80), scroll_delegate.max_scroll_offset());
-  EXPECT_EQ(1.f, scroll_delegate.page_scale_factor());
-  EXPECT_EQ(0.f, scroll_delegate.min_page_scale_factor());
-  EXPECT_EQ(0.f, scroll_delegate.max_page_scale_factor());
-
-  // Updating page scale immediately updates the delegate.
-  host_impl_->active_tree()->PushPageScaleFromMainThread(2.f, 0.5f, 4.f);
-  EXPECT_EQ(2.f, scroll_delegate.page_scale_factor());
-  EXPECT_EQ(0.5f, scroll_delegate.min_page_scale_factor());
-  EXPECT_EQ(4.f, scroll_delegate.max_page_scale_factor());
-  host_impl_->SetPageScaleOnActiveTree(2.f * 1.5f);
-  EXPECT_EQ(3.f, scroll_delegate.page_scale_factor());
-  EXPECT_EQ(0.5f, scroll_delegate.min_page_scale_factor());
-  EXPECT_EQ(4.f, scroll_delegate.max_page_scale_factor());
-  host_impl_->SetPageScaleOnActiveTree(2.f);
-  host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, 0.5f, 4.f);
-  EXPECT_EQ(1.f, scroll_delegate.page_scale_factor());
-  EXPECT_EQ(0.5f, scroll_delegate.min_page_scale_factor());
-  EXPECT_EQ(4.f, scroll_delegate.max_page_scale_factor());
-
-  // The pinch gesture doesn't put the delegate into a state where the scroll
-  // offset is outside of the scroll range.  (this is verified by DCHECKs in the
-  // delegate).
-  host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE);
-  host_impl_->PinchGestureBegin();
-  host_impl_->PinchGestureUpdate(2.f, gfx::Point());
-  host_impl_->PinchGestureUpdate(.5f, gfx::Point());
-  host_impl_->PinchGestureEnd();
-  host_impl_->ScrollEnd();
-
-  // Scrolling should be relative to the offset as returned by the delegate.
-  gfx::Vector2dF scroll_delta(0.f, 10.f);
-  gfx::ScrollOffset current_offset(7.f, 8.f);
-
-  scroll_delegate.set_getter_return_value(current_offset);
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-
-  host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-  EXPECT_EQ(ScrollOffsetWithDelta(current_offset, scroll_delta),
-            scroll_delegate.last_set_scroll_offset());
-
-  current_offset = gfx::ScrollOffset(42.f, 41.f);
-  scroll_delegate.set_getter_return_value(current_offset);
-  host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-  EXPECT_EQ(current_offset + gfx::ScrollOffset(scroll_delta),
-            scroll_delegate.last_set_scroll_offset());
-  host_impl_->ScrollEnd();
-  scroll_delegate.set_getter_return_value(gfx::ScrollOffset());
-
-  // Forces a full tree synchronization and ensures that the scroll delegate
-  // sees the correct size of the new tree.
-  gfx::Size new_size(42, 24);
-  host_impl_->CreatePendingTree();
-  CreateScrollAndContentsLayers(host_impl_->pending_tree(), new_size);
-  host_impl_->ActivateSyncTree();
-  EXPECT_EQ(new_size, scroll_delegate.scrollable_size());
-
-  // Un-setting the delegate should propagate the delegate's current offset to
-  // the root scrollable layer.
-  current_offset = gfx::ScrollOffset(13.f, 12.f);
-  scroll_delegate.set_getter_return_value(current_offset);
-  host_impl_->SetRootLayerScrollOffsetDelegate(NULL);
-
-  EXPECT_EQ(current_offset.ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-}
-
-void CheckLayerScrollDelta(LayerImpl* layer, gfx::Vector2dF scroll_delta) {
-  const gfx::Transform target_space_transform =
-      layer->draw_properties().target_space_transform;
-  EXPECT_TRUE(target_space_transform.IsScaleOrTranslation());
-  gfx::Point translated_point;
-  target_space_transform.TransformPoint(&translated_point);
-  gfx::Point expected_point = gfx::Point() - ToRoundedVector2d(scroll_delta);
-  EXPECT_EQ(expected_point.ToString(), translated_point.ToString());
-}
-
-TEST_F(LayerTreeHostImplTest,
-       ExternalRootLayerScrollOffsetDelegationReflectedInNextDraw) {
-  TestScrollOffsetDelegate scroll_delegate;
-  host_impl_->SetViewportSize(gfx::Size(10, 20));
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  LayerImpl* clip_layer = scroll_layer->parent()->parent();
-  clip_layer->SetBounds(gfx::Size(10, 20));
-  host_impl_->SetRootLayerScrollOffsetDelegate(&scroll_delegate);
-
-  // Draw first frame to clear any pending draws and check scroll.
-  DrawFrame();
-  CheckLayerScrollDelta(scroll_layer, gfx::Vector2dF(0.f, 0.f));
-  EXPECT_FALSE(host_impl_->active_tree()->needs_update_draw_properties());
-
-  // Set external scroll delta on delegate and notify LayerTreeHost.
-  gfx::ScrollOffset scroll_offset(10.f, 10.f);
-  scroll_delegate.set_getter_return_value(scroll_offset);
-  host_impl_->OnRootLayerDelegatedScrollOffsetChanged();
-
-  // Check scroll delta reflected in layer.
-  LayerTreeHostImpl::FrameData frame;
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-  EXPECT_FALSE(frame.has_no_damage);
-  CheckLayerScrollDelta(scroll_layer, ScrollOffsetToVector2dF(scroll_offset));
-
-  host_impl_->SetRootLayerScrollOffsetDelegate(NULL);
-}
-
-TEST_F(LayerTreeHostImplTest, OverscrollRoot) {
-  InputHandlerScrollResult scroll_result;
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, 0.5f, 4.f);
-  DrawFrame();
-  EXPECT_EQ(gfx::Vector2dF(), host_impl_->accumulated_root_overscroll());
-
-  // In-bounds scrolling does not affect overscroll.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10));
-  EXPECT_TRUE(scroll_result.did_scroll);
-  EXPECT_FALSE(scroll_result.did_overscroll_root);
-  EXPECT_EQ(gfx::Vector2dF(), scroll_result.unused_scroll_delta);
-  EXPECT_EQ(gfx::Vector2dF(), host_impl_->accumulated_root_overscroll());
-
-  // Overscroll events are reflected immediately.
-  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 50));
-  EXPECT_TRUE(scroll_result.did_scroll);
-  EXPECT_TRUE(scroll_result.did_overscroll_root);
-  EXPECT_EQ(gfx::Vector2dF(0, 10), scroll_result.unused_scroll_delta);
-  EXPECT_EQ(gfx::Vector2dF(0, 10), host_impl_->accumulated_root_overscroll());
-  EXPECT_EQ(scroll_result.accumulated_root_overscroll,
-            host_impl_->accumulated_root_overscroll());
-
-  // In-bounds scrolling resets accumulated overscroll for the scrolled axes.
-  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, -50));
-  EXPECT_TRUE(scroll_result.did_scroll);
-  EXPECT_FALSE(scroll_result.did_overscroll_root);
-  EXPECT_EQ(gfx::Vector2dF(), scroll_result.unused_scroll_delta);
-  EXPECT_EQ(gfx::Vector2dF(0, 0), host_impl_->accumulated_root_overscroll());
-  EXPECT_EQ(scroll_result.accumulated_root_overscroll,
-            host_impl_->accumulated_root_overscroll());
-
-  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, -10));
-  EXPECT_FALSE(scroll_result.did_scroll);
-  EXPECT_TRUE(scroll_result.did_overscroll_root);
-  EXPECT_EQ(gfx::Vector2dF(0, -10), scroll_result.unused_scroll_delta);
-  EXPECT_EQ(gfx::Vector2dF(0, -10), host_impl_->accumulated_root_overscroll());
-  EXPECT_EQ(scroll_result.accumulated_root_overscroll,
-            host_impl_->accumulated_root_overscroll());
-
-  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(10, 0));
-  EXPECT_TRUE(scroll_result.did_scroll);
-  EXPECT_FALSE(scroll_result.did_overscroll_root);
-  EXPECT_EQ(gfx::Vector2dF(0, 0), scroll_result.unused_scroll_delta);
-  EXPECT_EQ(gfx::Vector2dF(0, -10), host_impl_->accumulated_root_overscroll());
-  EXPECT_EQ(scroll_result.accumulated_root_overscroll,
-            host_impl_->accumulated_root_overscroll());
-
-  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(-15, 0));
-  EXPECT_TRUE(scroll_result.did_scroll);
-  EXPECT_TRUE(scroll_result.did_overscroll_root);
-  EXPECT_EQ(gfx::Vector2dF(-5, 0), scroll_result.unused_scroll_delta);
-  EXPECT_EQ(gfx::Vector2dF(-5, -10), host_impl_->accumulated_root_overscroll());
-  EXPECT_EQ(scroll_result.accumulated_root_overscroll,
-            host_impl_->accumulated_root_overscroll());
-
-  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 60));
-  EXPECT_TRUE(scroll_result.did_scroll);
-  EXPECT_TRUE(scroll_result.did_overscroll_root);
-  EXPECT_EQ(gfx::Vector2dF(0, 10), scroll_result.unused_scroll_delta);
-  EXPECT_EQ(gfx::Vector2dF(-5, 10), host_impl_->accumulated_root_overscroll());
-  EXPECT_EQ(scroll_result.accumulated_root_overscroll,
-            host_impl_->accumulated_root_overscroll());
-
-  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(10, -60));
-  EXPECT_TRUE(scroll_result.did_scroll);
-  EXPECT_TRUE(scroll_result.did_overscroll_root);
-  EXPECT_EQ(gfx::Vector2dF(0, -10), scroll_result.unused_scroll_delta);
-  EXPECT_EQ(gfx::Vector2dF(0, -10), host_impl_->accumulated_root_overscroll());
-  EXPECT_EQ(scroll_result.accumulated_root_overscroll,
-            host_impl_->accumulated_root_overscroll());
-
-  // Overscroll accumulates within the scope of ScrollBegin/ScrollEnd as long
-  // as no scroll occurs.
-  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, -20));
-  EXPECT_FALSE(scroll_result.did_scroll);
-  EXPECT_TRUE(scroll_result.did_overscroll_root);
-  EXPECT_EQ(gfx::Vector2dF(0, -20), scroll_result.unused_scroll_delta);
-  EXPECT_EQ(gfx::Vector2dF(0, -30), host_impl_->accumulated_root_overscroll());
-  EXPECT_EQ(scroll_result.accumulated_root_overscroll,
-            host_impl_->accumulated_root_overscroll());
-
-  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, -20));
-  EXPECT_FALSE(scroll_result.did_scroll);
-  EXPECT_TRUE(scroll_result.did_overscroll_root);
-  EXPECT_EQ(gfx::Vector2dF(0, -20), scroll_result.unused_scroll_delta);
-  EXPECT_EQ(gfx::Vector2dF(0, -50), host_impl_->accumulated_root_overscroll());
-  EXPECT_EQ(scroll_result.accumulated_root_overscroll,
-            host_impl_->accumulated_root_overscroll());
-
-  // Overscroll resets on valid scroll.
-  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10));
-  EXPECT_TRUE(scroll_result.did_scroll);
-  EXPECT_FALSE(scroll_result.did_overscroll_root);
-  EXPECT_EQ(gfx::Vector2dF(0, 0), scroll_result.unused_scroll_delta);
-  EXPECT_EQ(gfx::Vector2dF(0, 0), host_impl_->accumulated_root_overscroll());
-  EXPECT_EQ(scroll_result.accumulated_root_overscroll,
-            host_impl_->accumulated_root_overscroll());
-
-  scroll_result = host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, -20));
-  EXPECT_TRUE(scroll_result.did_scroll);
-  EXPECT_TRUE(scroll_result.did_overscroll_root);
-  EXPECT_EQ(gfx::Vector2dF(0, -10), scroll_result.unused_scroll_delta);
-  EXPECT_EQ(gfx::Vector2dF(0, -10), host_impl_->accumulated_root_overscroll());
-  EXPECT_EQ(scroll_result.accumulated_root_overscroll,
-            host_impl_->accumulated_root_overscroll());
-
-  host_impl_->ScrollEnd();
-}
-
-
-TEST_F(LayerTreeHostImplTest, OverscrollChildWithoutBubbling) {
-  // Scroll child layers beyond their maximum scroll range and make sure root
-  // overscroll does not accumulate.
-  gfx::Size surface_size(10, 10);
-  scoped_ptr<LayerImpl> root_clip =
-      LayerImpl::Create(host_impl_->active_tree(), 4);
-  root_clip->SetHasRenderSurface(true);
-
-  scoped_ptr<LayerImpl> root =
-      CreateScrollableLayer(1, surface_size, root_clip.get());
-
-  scoped_ptr<LayerImpl> grand_child =
-      CreateScrollableLayer(3, surface_size, root_clip.get());
-
-  scoped_ptr<LayerImpl> child =
-      CreateScrollableLayer(2, surface_size, root_clip.get());
-  LayerImpl* grand_child_layer = grand_child.get();
-  child->AddChild(grand_child.Pass());
-
-  LayerImpl* child_layer = child.get();
-  root->AddChild(child.Pass());
-  root_clip->AddChild(root.Pass());
-  child_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(0, 3));
-  grand_child_layer->PushScrollOffsetFromMainThread(gfx::ScrollOffset(0, 2));
-  host_impl_->active_tree()->SetRootLayer(root_clip.Pass());
-  host_impl_->active_tree()->DidBecomeActive();
-  host_impl_->SetViewportSize(surface_size);
-  DrawFrame();
-  {
-    gfx::Vector2d scroll_delta(0, -10);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(),
-                                      InputHandler::NON_BUBBLING_GESTURE));
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    EXPECT_EQ(gfx::Vector2dF(), host_impl_->accumulated_root_overscroll());
-    host_impl_->ScrollEnd();
-
-    // The next time we scroll we should only scroll the parent, but overscroll
-    // should still not reach the root layer.
-    scroll_delta = gfx::Vector2d(0, -30);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(5, 5),
-                                      InputHandler::NON_BUBBLING_GESTURE));
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), grand_child_layer);
-    EXPECT_EQ(gfx::Vector2dF(), host_impl_->accumulated_root_overscroll());
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), child_layer);
-    EXPECT_EQ(gfx::Vector2dF(), host_impl_->accumulated_root_overscroll());
-    host_impl_->ScrollEnd();
-
-    // After scrolling the parent, another scroll on the opposite direction
-    // should scroll the child.
-    scroll_delta = gfx::Vector2d(0, 70);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(5, 5),
-                                      InputHandler::NON_BUBBLING_GESTURE));
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), grand_child_layer);
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), grand_child_layer);
-    EXPECT_EQ(gfx::Vector2dF(), host_impl_->accumulated_root_overscroll());
-    host_impl_->ScrollEnd();
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, OverscrollChildEventBubbling) {
-  // When we try to scroll a non-scrollable child layer, the scroll delta
-  // should be applied to one of its ancestors if possible. Overscroll should
-  // be reflected only when it has bubbled up to the root scrolling layer.
-  gfx::Size surface_size(10, 10);
-  gfx::Size content_size(20, 20);
-  scoped_ptr<LayerImpl> root_clip =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  root_clip->SetHasRenderSurface(true);
-
-  scoped_ptr<LayerImpl> root =
-      CreateScrollableLayer(1, content_size, root_clip.get());
-  root->SetIsContainerForFixedPositionLayers(true);
-  scoped_ptr<LayerImpl> child =
-      CreateScrollableLayer(2, content_size, root_clip.get());
-
-  child->SetScrollClipLayer(Layer::INVALID_ID);
-  root->AddChild(child.Pass());
-  root_clip->AddChild(root.Pass());
-
-  host_impl_->SetViewportSize(surface_size);
-  host_impl_->active_tree()->SetRootLayer(root_clip.Pass());
-  host_impl_->active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 3, 1,
-                                                      Layer::INVALID_ID);
-  host_impl_->active_tree()->DidBecomeActive();
-  DrawFrame();
-  {
-    gfx::Vector2d scroll_delta(0, 8);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(5, 5), InputHandler::WHEEL));
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    EXPECT_EQ(gfx::Vector2dF(), host_impl_->accumulated_root_overscroll());
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    EXPECT_EQ(gfx::Vector2dF(0, 6), host_impl_->accumulated_root_overscroll());
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    EXPECT_EQ(gfx::Vector2dF(0, 14), host_impl_->accumulated_root_overscroll());
-    host_impl_->ScrollEnd();
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, OverscrollAlways) {
-  LayerTreeSettings settings;
-  CreateHostImpl(settings, CreateOutputSurface());
-
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(50, 50));
-  LayerImpl* clip_layer = scroll_layer->parent()->parent();
-  clip_layer->SetBounds(gfx::Size(50, 50));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, 0.5f, 4.f);
-  DrawFrame();
-  EXPECT_EQ(gfx::Vector2dF(), host_impl_->accumulated_root_overscroll());
-
-  // Even though the layer can't scroll the overscroll still happens.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-  host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10));
-  EXPECT_EQ(gfx::Vector2dF(0, 10), host_impl_->accumulated_root_overscroll());
-}
-
-TEST_F(LayerTreeHostImplTest, NoOverscrollOnFractionalDeviceScale) {
-  gfx::Size surface_size(980, 1439);
-  gfx::Size content_size(980, 1438);
-  float device_scale_factor = 1.5f;
-  scoped_ptr<LayerImpl> root_clip =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  root_clip->SetHasRenderSurface(true);
-
-  scoped_ptr<LayerImpl> root =
-      CreateScrollableLayer(1, content_size, root_clip.get());
-  root->SetIsContainerForFixedPositionLayers(true);
-  scoped_ptr<LayerImpl> child =
-      CreateScrollableLayer(2, content_size, root_clip.get());
-  root->scroll_clip_layer()->SetBounds(gfx::Size(320, 469));
-  host_impl_->active_tree()->PushPageScaleFromMainThread(0.326531f, 0.326531f,
-                                                         5.f);
-  host_impl_->SetPageScaleOnActiveTree(0.326531f);
-  child->SetScrollClipLayer(Layer::INVALID_ID);
-  root->AddChild(child.Pass());
-  root_clip->AddChild(root.Pass());
-
-  host_impl_->SetViewportSize(surface_size);
-  host_impl_->SetDeviceScaleFactor(device_scale_factor);
-  host_impl_->active_tree()->SetRootLayer(root_clip.Pass());
-  host_impl_->active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 3, 1,
-                                                      Layer::INVALID_ID);
-  host_impl_->active_tree()->DidBecomeActive();
-  DrawFrame();
-  {
-    // Horizontal & Vertical GlowEffect should not be applied when
-    // content size is less then view port size. For Example Horizontal &
-    // vertical GlowEffect should not be applied in about:blank page.
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(0, 0), InputHandler::WHEEL));
-    host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(0, -1));
-    EXPECT_EQ(gfx::Vector2dF().ToString(),
-              host_impl_->accumulated_root_overscroll().ToString());
-
-    host_impl_->ScrollEnd();
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, NoOverscrollWhenNotAtEdge) {
-  gfx::Size surface_size(100, 100);
-  gfx::Size content_size(200, 200);
-  scoped_ptr<LayerImpl> root_clip =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  root_clip->SetHasRenderSurface(true);
-
-  scoped_ptr<LayerImpl> root =
-      CreateScrollableLayer(1, content_size, root_clip.get());
-  root->SetIsContainerForFixedPositionLayers(true);
-  scoped_ptr<LayerImpl> child =
-      CreateScrollableLayer(2, content_size, root_clip.get());
-
-  child->SetScrollClipLayer(Layer::INVALID_ID);
-  root->AddChild(child.Pass());
-  root_clip->AddChild(root.Pass());
-
-  host_impl_->SetViewportSize(surface_size);
-  host_impl_->active_tree()->SetRootLayer(root_clip.Pass());
-  host_impl_->active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 3, 1,
-                                                      Layer::INVALID_ID);
-  host_impl_->active_tree()->DidBecomeActive();
-  DrawFrame();
-  {
-    // Edge glow effect should be applicable only upon reaching Edges
-    // of the content. unnecessary glow effect calls shouldn't be
-    // called while scrolling up without reaching the edge of the content.
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(0, 0), InputHandler::WHEEL));
-    host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(0, 100));
-    EXPECT_EQ(gfx::Vector2dF().ToString(),
-              host_impl_->accumulated_root_overscroll().ToString());
-    host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(0, -2.30f));
-    EXPECT_EQ(gfx::Vector2dF().ToString(),
-              host_impl_->accumulated_root_overscroll().ToString());
-    host_impl_->ScrollEnd();
-    // unusedrootDelta should be subtracted from applied delta so that
-    // unwanted glow effect calls are not called.
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(0, 0),
-                                      InputHandler::NON_BUBBLING_GESTURE));
-    EXPECT_EQ(InputHandler::SCROLL_STARTED, host_impl_->FlingScrollBegin());
-    host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(0, 20));
-    EXPECT_EQ(gfx::Vector2dF(0.000000f, 17.699997f).ToString(),
-              host_impl_->accumulated_root_overscroll().ToString());
-
-    host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(0.02f, -0.01f));
-    EXPECT_EQ(gfx::Vector2dF(0.000000f, 17.699997f).ToString(),
-              host_impl_->accumulated_root_overscroll().ToString());
-    host_impl_->ScrollEnd();
-    // TestCase to check  kEpsilon, which prevents minute values to trigger
-    // gloweffect without reaching edge.
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(0, 0), InputHandler::WHEEL));
-    host_impl_->ScrollBy(gfx::Point(), gfx::Vector2dF(-0.12f, 0.1f));
-    EXPECT_EQ(gfx::Vector2dF().ToString(),
-              host_impl_->accumulated_root_overscroll().ToString());
-    host_impl_->ScrollEnd();
-  }
-}
-
-class BlendStateCheckLayer : public LayerImpl {
- public:
-  static scoped_ptr<LayerImpl> Create(LayerTreeImpl* tree_impl,
-                                      int id,
-                                      ResourceProvider* resource_provider) {
-    return make_scoped_ptr(
-        new BlendStateCheckLayer(tree_impl, id, resource_provider));
-  }
-
-  void AppendQuads(RenderPass* render_pass,
-                   AppendQuadsData* append_quads_data) override {
-    quads_appended_ = true;
-
-    gfx::Rect opaque_rect;
-    if (contents_opaque())
-      opaque_rect = quad_rect_;
-    else
-      opaque_rect = opaque_content_rect_;
-    gfx::Rect visible_quad_rect = quad_rect_;
-
-    SharedQuadState* shared_quad_state =
-        render_pass->CreateAndAppendSharedQuadState();
-    PopulateSharedQuadState(shared_quad_state);
-
-    TileDrawQuad* test_blending_draw_quad =
-        render_pass->CreateAndAppendDrawQuad<TileDrawQuad>();
-    test_blending_draw_quad->SetNew(shared_quad_state,
-                                    quad_rect_,
-                                    opaque_rect,
-                                    visible_quad_rect,
-                                    resource_id_,
-                                    gfx::RectF(0.f, 0.f, 1.f, 1.f),
-                                    gfx::Size(1, 1),
-                                    false,
-                                    false);
-    test_blending_draw_quad->visible_rect = quad_visible_rect_;
-    EXPECT_EQ(blend_, test_blending_draw_quad->ShouldDrawWithBlending());
-    EXPECT_EQ(has_render_surface_, !!render_surface());
-  }
-
-  void SetExpectation(bool blend, bool has_render_surface) {
-    blend_ = blend;
-    has_render_surface_ = has_render_surface;
-    quads_appended_ = false;
-  }
-
-  bool quads_appended() const { return quads_appended_; }
-
-  void SetQuadRect(const gfx::Rect& rect) { quad_rect_ = rect; }
-  void SetQuadVisibleRect(const gfx::Rect& rect) { quad_visible_rect_ = rect; }
-  void SetOpaqueContentRect(const gfx::Rect& rect) {
-    opaque_content_rect_ = rect;
-  }
-
- private:
-  BlendStateCheckLayer(LayerTreeImpl* tree_impl,
-                       int id,
-                       ResourceProvider* resource_provider)
-      : LayerImpl(tree_impl, id),
-        blend_(false),
-        has_render_surface_(false),
-        quads_appended_(false),
-        quad_rect_(5, 5, 5, 5),
-        quad_visible_rect_(5, 5, 5, 5),
-        resource_id_(resource_provider->CreateResource(
-            gfx::Size(1, 1),
-            GL_CLAMP_TO_EDGE,
-            ResourceProvider::TEXTURE_HINT_IMMUTABLE,
-            RGBA_8888)) {
-    resource_provider->AllocateForTesting(resource_id_);
-    SetBounds(gfx::Size(10, 10));
-    SetContentBounds(gfx::Size(10, 10));
-    SetDrawsContent(true);
-  }
-
-  bool blend_;
-  bool has_render_surface_;
-  bool quads_appended_;
-  gfx::Rect quad_rect_;
-  gfx::Rect opaque_content_rect_;
-  gfx::Rect quad_visible_rect_;
-  ResourceProvider::ResourceId resource_id_;
-};
-
-TEST_F(LayerTreeHostImplTest, BlendingOffWhenDrawingOpaqueLayers) {
-  {
-    scoped_ptr<LayerImpl> root =
-        LayerImpl::Create(host_impl_->active_tree(), 1);
-    root->SetBounds(gfx::Size(10, 10));
-    root->SetContentBounds(root->bounds());
-    root->SetDrawsContent(false);
-    root->SetHasRenderSurface(true);
-    host_impl_->active_tree()->SetRootLayer(root.Pass());
-  }
-  LayerImpl* root = host_impl_->active_tree()->root_layer();
-
-  root->AddChild(
-      BlendStateCheckLayer::Create(host_impl_->active_tree(),
-                                   2,
-                                   host_impl_->resource_provider()));
-  BlendStateCheckLayer* layer1 =
-      static_cast<BlendStateCheckLayer*>(root->children()[0]);
-  layer1->SetPosition(gfx::PointF(2.f, 2.f));
-
-  LayerTreeHostImpl::FrameData frame;
-
-  // Opaque layer, drawn without blending.
-  layer1->SetContentsOpaque(true);
-  layer1->SetExpectation(false, false);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-
-  // Layer with translucent content and painting, so drawn with blending.
-  layer1->SetContentsOpaque(false);
-  layer1->SetExpectation(true, false);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-
-  // Layer with translucent opacity, drawn with blending.
-  layer1->SetContentsOpaque(true);
-  layer1->SetOpacity(0.5f);
-  layer1->SetExpectation(true, false);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-
-  // Layer with translucent opacity and painting, drawn with blending.
-  layer1->SetContentsOpaque(true);
-  layer1->SetOpacity(0.5f);
-  layer1->SetExpectation(true, false);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-
-  layer1->AddChild(
-      BlendStateCheckLayer::Create(host_impl_->active_tree(),
-                                   3,
-                                   host_impl_->resource_provider()));
-  BlendStateCheckLayer* layer2 =
-      static_cast<BlendStateCheckLayer*>(layer1->children()[0]);
-  layer2->SetPosition(gfx::PointF(4.f, 4.f));
-
-  // 2 opaque layers, drawn without blending.
-  layer1->SetContentsOpaque(true);
-  layer1->SetOpacity(1.f);
-  layer1->SetExpectation(false, false);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  layer2->SetContentsOpaque(true);
-  layer2->SetOpacity(1.f);
-  layer2->SetExpectation(false, false);
-  layer2->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  EXPECT_TRUE(layer2->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-
-  // Parent layer with translucent content, drawn with blending.
-  // Child layer with opaque content, drawn without blending.
-  layer1->SetContentsOpaque(false);
-  layer1->SetExpectation(true, false);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  layer2->SetExpectation(false, false);
-  layer2->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  EXPECT_TRUE(layer2->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-
-  // Parent layer with translucent content but opaque painting, drawn without
-  // blending.
-  // Child layer with opaque content, drawn without blending.
-  layer1->SetContentsOpaque(true);
-  layer1->SetExpectation(false, false);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  layer2->SetExpectation(false, false);
-  layer2->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  EXPECT_TRUE(layer2->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-
-  // Parent layer with translucent opacity and opaque content. Since it has a
-  // drawing child, it's drawn to a render surface which carries the opacity,
-  // so it's itself drawn without blending.
-  // Child layer with opaque content, drawn without blending (parent surface
-  // carries the inherited opacity).
-  layer1->SetContentsOpaque(true);
-  layer1->SetOpacity(0.5f);
-  layer1->SetHasRenderSurface(true);
-  layer1->SetExpectation(false, true);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  layer2->SetExpectation(false, false);
-  layer2->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  FakeLayerTreeHostImpl::RecursiveUpdateNumChildren(
-      host_impl_->active_tree()->root_layer());
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  EXPECT_TRUE(layer2->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-  layer1->SetHasRenderSurface(false);
-
-  // Draw again, but with child non-opaque, to make sure
-  // layer1 not culled.
-  layer1->SetContentsOpaque(true);
-  layer1->SetOpacity(1.f);
-  layer1->SetExpectation(false, false);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  layer2->SetContentsOpaque(true);
-  layer2->SetOpacity(0.5f);
-  layer2->SetExpectation(true, false);
-  layer2->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  EXPECT_TRUE(layer2->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-
-  // A second way of making the child non-opaque.
-  layer1->SetContentsOpaque(true);
-  layer1->SetOpacity(1.f);
-  layer1->SetExpectation(false, false);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  layer2->SetContentsOpaque(false);
-  layer2->SetOpacity(1.f);
-  layer2->SetExpectation(true, false);
-  layer2->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  EXPECT_TRUE(layer2->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-
-  // And when the layer says its not opaque but is painted opaque, it is not
-  // blended.
-  layer1->SetContentsOpaque(true);
-  layer1->SetOpacity(1.f);
-  layer1->SetExpectation(false, false);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  layer2->SetContentsOpaque(true);
-  layer2->SetOpacity(1.f);
-  layer2->SetExpectation(false, false);
-  layer2->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  EXPECT_TRUE(layer2->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-
-  // Layer with partially opaque contents, drawn with blending.
-  layer1->SetContentsOpaque(false);
-  layer1->SetQuadRect(gfx::Rect(5, 5, 5, 5));
-  layer1->SetQuadVisibleRect(gfx::Rect(5, 5, 5, 5));
-  layer1->SetOpaqueContentRect(gfx::Rect(5, 5, 2, 5));
-  layer1->SetExpectation(true, false);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-
-  // Layer with partially opaque contents partially culled, drawn with blending.
-  layer1->SetContentsOpaque(false);
-  layer1->SetQuadRect(gfx::Rect(5, 5, 5, 5));
-  layer1->SetQuadVisibleRect(gfx::Rect(5, 5, 5, 2));
-  layer1->SetOpaqueContentRect(gfx::Rect(5, 5, 2, 5));
-  layer1->SetExpectation(true, false);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-
-  // Layer with partially opaque contents culled, drawn with blending.
-  layer1->SetContentsOpaque(false);
-  layer1->SetQuadRect(gfx::Rect(5, 5, 5, 5));
-  layer1->SetQuadVisibleRect(gfx::Rect(7, 5, 3, 5));
-  layer1->SetOpaqueContentRect(gfx::Rect(5, 5, 2, 5));
-  layer1->SetExpectation(true, false);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-
-  // Layer with partially opaque contents and translucent contents culled, drawn
-  // without blending.
-  layer1->SetContentsOpaque(false);
-  layer1->SetQuadRect(gfx::Rect(5, 5, 5, 5));
-  layer1->SetQuadVisibleRect(gfx::Rect(5, 5, 2, 5));
-  layer1->SetOpaqueContentRect(gfx::Rect(5, 5, 2, 5));
-  layer1->SetExpectation(false, false);
-  layer1->SetUpdateRect(gfx::Rect(layer1->content_bounds()));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(layer1->quads_appended());
-  host_impl_->DidDrawAllLayers(frame);
-}
-
-class LayerTreeHostImplViewportCoveredTest : public LayerTreeHostImplTest {
- protected:
-  LayerTreeHostImplViewportCoveredTest() :
-      gutter_quad_material_(DrawQuad::SOLID_COLOR),
-      child_(NULL),
-      did_activate_pending_tree_(false) {}
-
-  scoped_ptr<OutputSurface> CreateFakeOutputSurface(bool always_draw) {
-    if (always_draw) {
-      return FakeOutputSurface::CreateAlwaysDrawAndSwap3d();
-    }
-    return FakeOutputSurface::Create3d();
-  }
-
-  void SetupActiveTreeLayers() {
-    host_impl_->active_tree()->set_background_color(SK_ColorGRAY);
-    host_impl_->active_tree()->SetRootLayer(
-        LayerImpl::Create(host_impl_->active_tree(), 1));
-    host_impl_->active_tree()->root_layer()->SetHasRenderSurface(true);
-    host_impl_->active_tree()->root_layer()->AddChild(
-        BlendStateCheckLayer::Create(host_impl_->active_tree(),
-                                     2,
-                                     host_impl_->resource_provider()));
-    child_ = static_cast<BlendStateCheckLayer*>(
-        host_impl_->active_tree()->root_layer()->children()[0]);
-    child_->SetExpectation(false, false);
-    child_->SetContentsOpaque(true);
-  }
-
-  // Expect no gutter rects.
-  void TestLayerCoversFullViewport() {
-    gfx::Rect layer_rect(viewport_size_);
-    child_->SetPosition(layer_rect.origin());
-    child_->SetBounds(layer_rect.size());
-    child_->SetContentBounds(layer_rect.size());
-    child_->SetQuadRect(gfx::Rect(layer_rect.size()));
-    child_->SetQuadVisibleRect(gfx::Rect(layer_rect.size()));
-
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-    ASSERT_EQ(1u, frame.render_passes.size());
-
-    EXPECT_EQ(0u, CountGutterQuads(frame.render_passes[0]->quad_list));
-    EXPECT_EQ(1u, frame.render_passes[0]->quad_list.size());
-    ValidateTextureDrawQuads(frame.render_passes[0]->quad_list);
-
-    VerifyQuadsExactlyCoverViewport(frame.render_passes[0]->quad_list);
-    host_impl_->DidDrawAllLayers(frame);
-  }
-
-  // Expect fullscreen gutter rect.
-  void TestEmptyLayer() {
-    gfx::Rect layer_rect(0, 0, 0, 0);
-    child_->SetPosition(layer_rect.origin());
-    child_->SetBounds(layer_rect.size());
-    child_->SetContentBounds(layer_rect.size());
-    child_->SetQuadRect(gfx::Rect(layer_rect.size()));
-    child_->SetQuadVisibleRect(gfx::Rect(layer_rect.size()));
-
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-    ASSERT_EQ(1u, frame.render_passes.size());
-
-    EXPECT_EQ(1u, CountGutterQuads(frame.render_passes[0]->quad_list));
-    EXPECT_EQ(1u, frame.render_passes[0]->quad_list.size());
-    ValidateTextureDrawQuads(frame.render_passes[0]->quad_list);
-
-    VerifyQuadsExactlyCoverViewport(frame.render_passes[0]->quad_list);
-    host_impl_->DidDrawAllLayers(frame);
-  }
-
-  // Expect four surrounding gutter rects.
-  void TestLayerInMiddleOfViewport() {
-    gfx::Rect layer_rect(500, 500, 200, 200);
-    child_->SetPosition(layer_rect.origin());
-    child_->SetBounds(layer_rect.size());
-    child_->SetContentBounds(layer_rect.size());
-    child_->SetQuadRect(gfx::Rect(layer_rect.size()));
-    child_->SetQuadVisibleRect(gfx::Rect(layer_rect.size()));
-
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-    ASSERT_EQ(1u, frame.render_passes.size());
-
-    EXPECT_EQ(4u, CountGutterQuads(frame.render_passes[0]->quad_list));
-    EXPECT_EQ(5u, frame.render_passes[0]->quad_list.size());
-    ValidateTextureDrawQuads(frame.render_passes[0]->quad_list);
-
-    VerifyQuadsExactlyCoverViewport(frame.render_passes[0]->quad_list);
-    host_impl_->DidDrawAllLayers(frame);
-  }
-
-  // Expect no gutter rects.
-  void TestLayerIsLargerThanViewport() {
-    gfx::Rect layer_rect(viewport_size_.width() + 10,
-                         viewport_size_.height() + 10);
-    child_->SetPosition(layer_rect.origin());
-    child_->SetBounds(layer_rect.size());
-    child_->SetContentBounds(layer_rect.size());
-    child_->SetQuadRect(gfx::Rect(layer_rect.size()));
-    child_->SetQuadVisibleRect(gfx::Rect(layer_rect.size()));
-
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-    ASSERT_EQ(1u, frame.render_passes.size());
-
-    EXPECT_EQ(0u, CountGutterQuads(frame.render_passes[0]->quad_list));
-    EXPECT_EQ(1u, frame.render_passes[0]->quad_list.size());
-    ValidateTextureDrawQuads(frame.render_passes[0]->quad_list);
-
-    host_impl_->DidDrawAllLayers(frame);
-  }
-
-  void DidActivateSyncTree() override { did_activate_pending_tree_ = true; }
-
-  void set_gutter_quad_material(DrawQuad::Material material) {
-    gutter_quad_material_ = material;
-  }
-  void set_gutter_texture_size(const gfx::Size& gutter_texture_size) {
-    gutter_texture_size_ = gutter_texture_size;
-  }
-
- protected:
-  size_t CountGutterQuads(const QuadList& quad_list) {
-    size_t num_gutter_quads = 0;
-    for (const auto& quad : quad_list) {
-      num_gutter_quads += (quad->material == gutter_quad_material_) ? 1 : 0;
-    }
-    return num_gutter_quads;
-  }
-
-  void VerifyQuadsExactlyCoverViewport(const QuadList& quad_list) {
-    LayerTestCommon::VerifyQuadsExactlyCoverRect(
-        quad_list, gfx::Rect(DipSizeToPixelSize(viewport_size_)));
-  }
-
-  // Make sure that the texture coordinates match their expectations.
-  void ValidateTextureDrawQuads(const QuadList& quad_list) {
-    for (const auto& quad : quad_list) {
-      if (quad->material != DrawQuad::TEXTURE_CONTENT)
-        continue;
-      const TextureDrawQuad* texture_quad = TextureDrawQuad::MaterialCast(quad);
-      gfx::SizeF gutter_texture_size_pixels = gfx::ScaleSize(
-          gutter_texture_size_, host_impl_->device_scale_factor());
-      EXPECT_EQ(texture_quad->uv_top_left.x(),
-                texture_quad->rect.x() / gutter_texture_size_pixels.width());
-      EXPECT_EQ(texture_quad->uv_top_left.y(),
-                texture_quad->rect.y() / gutter_texture_size_pixels.height());
-      EXPECT_EQ(
-          texture_quad->uv_bottom_right.x(),
-          texture_quad->rect.right() / gutter_texture_size_pixels.width());
-      EXPECT_EQ(
-          texture_quad->uv_bottom_right.y(),
-          texture_quad->rect.bottom() / gutter_texture_size_pixels.height());
-    }
-  }
-
-  gfx::Size DipSizeToPixelSize(const gfx::Size& size) {
-    return gfx::ToRoundedSize(
-        gfx::ScaleSize(size, host_impl_->device_scale_factor()));
-  }
-
-  DrawQuad::Material gutter_quad_material_;
-  gfx::Size gutter_texture_size_;
-  gfx::Size viewport_size_;
-  BlendStateCheckLayer* child_;
-  bool did_activate_pending_tree_;
-};
-
-TEST_F(LayerTreeHostImplViewportCoveredTest, ViewportCovered) {
-  viewport_size_ = gfx::Size(1000, 1000);
-
-  bool always_draw = false;
-  CreateHostImpl(DefaultSettings(), CreateFakeOutputSurface(always_draw));
-
-  host_impl_->SetViewportSize(DipSizeToPixelSize(viewport_size_));
-  SetupActiveTreeLayers();
-  TestLayerCoversFullViewport();
-  TestEmptyLayer();
-  TestLayerInMiddleOfViewport();
-  TestLayerIsLargerThanViewport();
-}
-
-TEST_F(LayerTreeHostImplViewportCoveredTest, ViewportCoveredScaled) {
-  viewport_size_ = gfx::Size(1000, 1000);
-
-  bool always_draw = false;
-  CreateHostImpl(DefaultSettings(), CreateFakeOutputSurface(always_draw));
-
-  host_impl_->SetDeviceScaleFactor(2.f);
-  host_impl_->SetViewportSize(DipSizeToPixelSize(viewport_size_));
-  SetupActiveTreeLayers();
-  TestLayerCoversFullViewport();
-  TestEmptyLayer();
-  TestLayerInMiddleOfViewport();
-  TestLayerIsLargerThanViewport();
-}
-
-TEST_F(LayerTreeHostImplViewportCoveredTest, ActiveTreeGrowViewportInvalid) {
-  viewport_size_ = gfx::Size(1000, 1000);
-
-  bool always_draw = true;
-  CreateHostImpl(DefaultSettings(), CreateFakeOutputSurface(always_draw));
-
-  // Pending tree to force active_tree size invalid. Not used otherwise.
-  host_impl_->CreatePendingTree();
-  host_impl_->SetViewportSize(DipSizeToPixelSize(viewport_size_));
-  EXPECT_TRUE(host_impl_->active_tree()->ViewportSizeInvalid());
-
-  SetupActiveTreeLayers();
-  TestEmptyLayer();
-  TestLayerInMiddleOfViewport();
-  TestLayerIsLargerThanViewport();
-}
-
-TEST_F(LayerTreeHostImplViewportCoveredTest, ActiveTreeShrinkViewportInvalid) {
-  viewport_size_ = gfx::Size(1000, 1000);
-
-  bool always_draw = true;
-  CreateHostImpl(DefaultSettings(), CreateFakeOutputSurface(always_draw));
-
-  // Set larger viewport and activate it to active tree.
-  host_impl_->CreatePendingTree();
-  gfx::Size larger_viewport(viewport_size_.width() + 100,
-                            viewport_size_.height() + 100);
-  host_impl_->SetViewportSize(DipSizeToPixelSize(larger_viewport));
-  EXPECT_TRUE(host_impl_->active_tree()->ViewportSizeInvalid());
-  host_impl_->ActivateSyncTree();
-  EXPECT_TRUE(did_activate_pending_tree_);
-  EXPECT_FALSE(host_impl_->active_tree()->ViewportSizeInvalid());
-
-  // Shrink pending tree viewport without activating.
-  host_impl_->CreatePendingTree();
-  host_impl_->SetViewportSize(DipSizeToPixelSize(viewport_size_));
-  EXPECT_TRUE(host_impl_->active_tree()->ViewportSizeInvalid());
-
-  SetupActiveTreeLayers();
-  TestEmptyLayer();
-  TestLayerInMiddleOfViewport();
-  TestLayerIsLargerThanViewport();
-}
-
-class FakeDrawableLayerImpl: public LayerImpl {
- public:
-  static scoped_ptr<LayerImpl> Create(LayerTreeImpl* tree_impl, int id) {
-    return make_scoped_ptr(new FakeDrawableLayerImpl(tree_impl, id));
-  }
- protected:
-  FakeDrawableLayerImpl(LayerTreeImpl* tree_impl, int id)
-      : LayerImpl(tree_impl, id) {}
-};
-
-// Only reshape when we know we are going to draw. Otherwise, the reshape
-// can leave the window at the wrong size if we never draw and the proper
-// viewport size is never set.
-TEST_F(LayerTreeHostImplTest, ReshapeNotCalledUntilDraw) {
-  scoped_refptr<TestContextProvider> provider(TestContextProvider::Create());
-  scoped_ptr<OutputSurface> output_surface(
-      FakeOutputSurface::Create3d(provider));
-  CreateHostImpl(DefaultSettings(), output_surface.Pass());
-
-  scoped_ptr<LayerImpl> root =
-      FakeDrawableLayerImpl::Create(host_impl_->active_tree(), 1);
-  root->SetBounds(gfx::Size(10, 10));
-  root->SetContentBounds(gfx::Size(10, 10));
-  root->SetDrawsContent(true);
-  root->SetHasRenderSurface(true);
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-  EXPECT_FALSE(provider->TestContext3d()->reshape_called());
-  provider->TestContext3d()->clear_reshape_called();
-
-  LayerTreeHostImpl::FrameData frame;
-  host_impl_->SetViewportSize(gfx::Size(10, 10));
-  host_impl_->SetDeviceScaleFactor(1.f);
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(provider->TestContext3d()->reshape_called());
-  EXPECT_EQ(provider->TestContext3d()->width(), 10);
-  EXPECT_EQ(provider->TestContext3d()->height(), 10);
-  EXPECT_EQ(provider->TestContext3d()->scale_factor(), 1.f);
-  host_impl_->DidDrawAllLayers(frame);
-  provider->TestContext3d()->clear_reshape_called();
-
-  host_impl_->SetViewportSize(gfx::Size(20, 30));
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(provider->TestContext3d()->reshape_called());
-  EXPECT_EQ(provider->TestContext3d()->width(), 20);
-  EXPECT_EQ(provider->TestContext3d()->height(), 30);
-  EXPECT_EQ(provider->TestContext3d()->scale_factor(), 1.f);
-  host_impl_->DidDrawAllLayers(frame);
-  provider->TestContext3d()->clear_reshape_called();
-
-  host_impl_->SetDeviceScaleFactor(2.f);
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  EXPECT_TRUE(provider->TestContext3d()->reshape_called());
-  EXPECT_EQ(provider->TestContext3d()->width(), 20);
-  EXPECT_EQ(provider->TestContext3d()->height(), 30);
-  EXPECT_EQ(provider->TestContext3d()->scale_factor(), 2.f);
-  host_impl_->DidDrawAllLayers(frame);
-  provider->TestContext3d()->clear_reshape_called();
-}
-
-// Make sure damage tracking propagates all the way to the graphics context,
-// where it should request to swap only the sub-buffer that is damaged.
-TEST_F(LayerTreeHostImplTest, PartialSwapReceivesDamageRect) {
-  scoped_refptr<TestContextProvider> context_provider(
-      TestContextProvider::Create());
-  context_provider->BindToCurrentThread();
-  context_provider->TestContext3d()->set_have_post_sub_buffer(true);
-
-  scoped_ptr<FakeOutputSurface> output_surface(
-      FakeOutputSurface::Create3d(context_provider));
-  FakeOutputSurface* fake_output_surface = output_surface.get();
-
-  // This test creates its own LayerTreeHostImpl, so
-  // that we can force partial swap enabled.
-  LayerTreeSettings settings;
-  settings.renderer_settings.partial_swap_enabled = true;
-  scoped_ptr<LayerTreeHostImpl> layer_tree_host_impl =
-      LayerTreeHostImpl::Create(
-          settings, this, &proxy_, &stats_instrumentation_,
-          shared_bitmap_manager_.get(), NULL, task_graph_runner_.get(), 0);
-  layer_tree_host_impl->InitializeRenderer(output_surface.Pass());
-  layer_tree_host_impl->SetViewportSize(gfx::Size(500, 500));
-
-  scoped_ptr<LayerImpl> root =
-      FakeDrawableLayerImpl::Create(layer_tree_host_impl->active_tree(), 1);
-  root->SetHasRenderSurface(true);
-  scoped_ptr<LayerImpl> child =
-      FakeDrawableLayerImpl::Create(layer_tree_host_impl->active_tree(), 2);
-  child->SetPosition(gfx::PointF(12.f, 13.f));
-  child->SetBounds(gfx::Size(14, 15));
-  child->SetContentBounds(gfx::Size(14, 15));
-  child->SetDrawsContent(true);
-  root->SetBounds(gfx::Size(500, 500));
-  root->SetContentBounds(gfx::Size(500, 500));
-  root->SetDrawsContent(true);
-  root->AddChild(child.Pass());
-  layer_tree_host_impl->active_tree()->SetRootLayer(root.Pass());
-
-  LayerTreeHostImpl::FrameData frame;
-
-  // First frame, the entire screen should get swapped.
-  EXPECT_EQ(DRAW_SUCCESS, layer_tree_host_impl->PrepareToDraw(&frame));
-  layer_tree_host_impl->DrawLayers(&frame, gfx::FrameTime::Now());
-  layer_tree_host_impl->DidDrawAllLayers(frame);
-  layer_tree_host_impl->SwapBuffers(frame);
-  gfx::Rect expected_swap_rect(0, 0, 500, 500);
-  EXPECT_EQ(expected_swap_rect.ToString(),
-            fake_output_surface->last_swap_rect().ToString());
-
-  // Second frame, only the damaged area should get swapped. Damage should be
-  // the union of old and new child rects.
-  // expected damage rect: gfx::Rect(26, 28);
-  // expected swap rect: vertically flipped, with origin at bottom left corner.
-  layer_tree_host_impl->active_tree()->root_layer()->children()[0]->SetPosition(
-      gfx::PointF());
-  EXPECT_EQ(DRAW_SUCCESS, layer_tree_host_impl->PrepareToDraw(&frame));
-  layer_tree_host_impl->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-  layer_tree_host_impl->SwapBuffers(frame);
-
-  // Make sure that partial swap is constrained to the viewport dimensions
-  // expected damage rect: gfx::Rect(500, 500);
-  // expected swap rect: flipped damage rect, but also clamped to viewport
-  expected_swap_rect = gfx::Rect(0, 500-28, 26, 28);
-  EXPECT_EQ(expected_swap_rect.ToString(),
-            fake_output_surface->last_swap_rect().ToString());
-
-  layer_tree_host_impl->SetViewportSize(gfx::Size(10, 10));
-  // This will damage everything.
-  layer_tree_host_impl->active_tree()->root_layer()->SetBackgroundColor(
-      SK_ColorBLACK);
-  EXPECT_EQ(DRAW_SUCCESS, layer_tree_host_impl->PrepareToDraw(&frame));
-  layer_tree_host_impl->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-  layer_tree_host_impl->SwapBuffers(frame);
-
-  expected_swap_rect = gfx::Rect(0, 0, 10, 10);
-  EXPECT_EQ(expected_swap_rect.ToString(),
-            fake_output_surface->last_swap_rect().ToString());
-}
-
-TEST_F(LayerTreeHostImplTest, RootLayerDoesntCreateExtraSurface) {
-  scoped_ptr<LayerImpl> root =
-      FakeDrawableLayerImpl::Create(host_impl_->active_tree(), 1);
-  scoped_ptr<LayerImpl> child =
-      FakeDrawableLayerImpl::Create(host_impl_->active_tree(), 2);
-  child->SetBounds(gfx::Size(10, 10));
-  child->SetContentBounds(gfx::Size(10, 10));
-  child->SetDrawsContent(true);
-  root->SetBounds(gfx::Size(10, 10));
-  root->SetContentBounds(gfx::Size(10, 10));
-  root->SetDrawsContent(true);
-  root->SetHasRenderSurface(true);
-  root->AddChild(child.Pass());
-
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-
-  LayerTreeHostImpl::FrameData frame;
-
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  EXPECT_EQ(1u, frame.render_surface_layer_list->size());
-  EXPECT_EQ(1u, frame.render_passes.size());
-  host_impl_->DidDrawAllLayers(frame);
-}
-
-class FakeLayerWithQuads : public LayerImpl {
- public:
-  static scoped_ptr<LayerImpl> Create(LayerTreeImpl* tree_impl, int id) {
-    return make_scoped_ptr(new FakeLayerWithQuads(tree_impl, id));
-  }
-
-  void AppendQuads(RenderPass* render_pass,
-                   AppendQuadsData* append_quads_data) override {
-    SharedQuadState* shared_quad_state =
-        render_pass->CreateAndAppendSharedQuadState();
-    PopulateSharedQuadState(shared_quad_state);
-
-    SkColor gray = SkColorSetRGB(100, 100, 100);
-    gfx::Rect quad_rect(content_bounds());
-    gfx::Rect visible_quad_rect(quad_rect);
-    SolidColorDrawQuad* my_quad =
-        render_pass->CreateAndAppendDrawQuad<SolidColorDrawQuad>();
-    my_quad->SetNew(
-        shared_quad_state, quad_rect, visible_quad_rect, gray, false);
-  }
-
- private:
-  FakeLayerWithQuads(LayerTreeImpl* tree_impl, int id)
-      : LayerImpl(tree_impl, id) {}
-};
-
-class MockContext : public TestWebGraphicsContext3D {
- public:
-  MOCK_METHOD1(useProgram, void(GLuint program));
-  MOCK_METHOD5(uniform4f, void(GLint location,
-                               GLfloat x,
-                               GLfloat y,
-                               GLfloat z,
-                               GLfloat w));
-  MOCK_METHOD4(uniformMatrix4fv, void(GLint location,
-                                      GLsizei count,
-                                      GLboolean transpose,
-                                      const GLfloat* value));
-  MOCK_METHOD4(drawElements, void(GLenum mode,
-                                  GLsizei count,
-                                  GLenum type,
-                                  GLintptr offset));
-  MOCK_METHOD1(enable, void(GLenum cap));
-  MOCK_METHOD1(disable, void(GLenum cap));
-  MOCK_METHOD4(scissor, void(GLint x,
-                             GLint y,
-                             GLsizei width,
-                             GLsizei height));
-};
-
-class MockContextHarness {
- private:
-  MockContext* context_;
-
- public:
-  explicit MockContextHarness(MockContext* context)
-      : context_(context) {
-    context_->set_have_post_sub_buffer(true);
-
-    // Catch "uninteresting" calls
-    EXPECT_CALL(*context_, useProgram(_))
-        .Times(0);
-
-    EXPECT_CALL(*context_, drawElements(_, _, _, _))
-        .Times(0);
-
-    // These are not asserted
-    EXPECT_CALL(*context_, uniformMatrix4fv(_, _, _, _))
-        .WillRepeatedly(Return());
-
-    EXPECT_CALL(*context_, uniform4f(_, _, _, _, _))
-        .WillRepeatedly(Return());
-
-    // Any un-sanctioned calls to enable() are OK
-    EXPECT_CALL(*context_, enable(_))
-        .WillRepeatedly(Return());
-
-    // Any un-sanctioned calls to disable() are OK
-    EXPECT_CALL(*context_, disable(_))
-        .WillRepeatedly(Return());
-  }
-
-  void MustDrawSolidQuad() {
-    EXPECT_CALL(*context_, drawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0))
-        .WillOnce(Return())
-        .RetiresOnSaturation();
-
-    EXPECT_CALL(*context_, useProgram(_))
-        .WillOnce(Return())
-        .RetiresOnSaturation();
-  }
-
-  void MustSetScissor(int x, int y, int width, int height) {
-    EXPECT_CALL(*context_, enable(GL_SCISSOR_TEST))
-        .WillRepeatedly(Return());
-
-    EXPECT_CALL(*context_, scissor(x, y, width, height))
-        .Times(AtLeast(1))
-        .WillRepeatedly(Return());
-  }
-
-  void MustSetNoScissor() {
-    EXPECT_CALL(*context_, disable(GL_SCISSOR_TEST))
-        .WillRepeatedly(Return());
-
-    EXPECT_CALL(*context_, enable(GL_SCISSOR_TEST))
-        .Times(0);
-
-    EXPECT_CALL(*context_, scissor(_, _, _, _))
-        .Times(0);
-  }
-};
-
-TEST_F(LayerTreeHostImplTest, NoPartialSwap) {
-  scoped_ptr<MockContext> mock_context_owned(new MockContext);
-  MockContext* mock_context = mock_context_owned.get();
-  MockContextHarness harness(mock_context);
-
-  // Run test case
-  LayerTreeSettings settings = DefaultSettings();
-  settings.renderer_settings.partial_swap_enabled = false;
-  CreateHostImpl(settings,
-                 FakeOutputSurface::Create3d(mock_context_owned.Pass()));
-  SetupRootLayerImpl(FakeLayerWithQuads::Create(host_impl_->active_tree(), 1));
-
-  // Without partial swap, and no clipping, no scissor is set.
-  harness.MustDrawSolidQuad();
-  harness.MustSetNoScissor();
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-  Mock::VerifyAndClearExpectations(&mock_context);
-
-  // Without partial swap, but a layer does clip its subtree, one scissor is
-  // set.
-  host_impl_->active_tree()->root_layer()->SetMasksToBounds(true);
-  harness.MustDrawSolidQuad();
-  harness.MustSetScissor(0, 0, 10, 10);
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-  Mock::VerifyAndClearExpectations(&mock_context);
-}
-
-TEST_F(LayerTreeHostImplTest, PartialSwap) {
-  scoped_ptr<MockContext> context_owned(new MockContext);
-  MockContext* mock_context = context_owned.get();
-  MockContextHarness harness(mock_context);
-
-  LayerTreeSettings settings = DefaultSettings();
-  settings.renderer_settings.partial_swap_enabled = true;
-  CreateHostImpl(settings, FakeOutputSurface::Create3d(context_owned.Pass()));
-  SetupRootLayerImpl(FakeLayerWithQuads::Create(host_impl_->active_tree(), 1));
-
-  // The first frame is not a partially-swapped one. No scissor should be set.
-  harness.MustSetNoScissor();
-  harness.MustDrawSolidQuad();
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-  Mock::VerifyAndClearExpectations(&mock_context);
-
-  // Damage a portion of the frame.
-  host_impl_->active_tree()->root_layer()->SetUpdateRect(
-      gfx::Rect(0, 0, 2, 3));
-
-  // The second frame will be partially-swapped (the y coordinates are flipped).
-  harness.MustSetScissor(0, 7, 2, 3);
-  harness.MustDrawSolidQuad();
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-  Mock::VerifyAndClearExpectations(&mock_context);
-}
-
-static scoped_ptr<LayerTreeHostImpl> SetupLayersForOpacity(
-    bool partial_swap,
-    LayerTreeHostImplClient* client,
-    Proxy* proxy,
-    SharedBitmapManager* manager,
-    RenderingStatsInstrumentation* stats_instrumentation) {
-  scoped_refptr<TestContextProvider> provider(TestContextProvider::Create());
-  scoped_ptr<OutputSurface> output_surface(
-      FakeOutputSurface::Create3d(provider));
-  provider->BindToCurrentThread();
-  provider->TestContext3d()->set_have_post_sub_buffer(true);
-
-  LayerTreeSettings settings;
-  settings.renderer_settings.partial_swap_enabled = partial_swap;
-  scoped_ptr<LayerTreeHostImpl> my_host_impl = LayerTreeHostImpl::Create(
-      settings, client, proxy, stats_instrumentation, manager, NULL, NULL, 0);
-  my_host_impl->InitializeRenderer(output_surface.Pass());
-  my_host_impl->SetViewportSize(gfx::Size(100, 100));
-
-  /*
-    Layers are created as follows:
-
-    +--------------------+
-    |                  1 |
-    |  +-----------+     |
-    |  |         2 |     |
-    |  | +-------------------+
-    |  | |   3               |
-    |  | +-------------------+
-    |  |           |     |
-    |  +-----------+     |
-    |                    |
-    |                    |
-    +--------------------+
-
-    Layers 1, 2 have render surfaces
-  */
-  scoped_ptr<LayerImpl> root =
-      LayerImpl::Create(my_host_impl->active_tree(), 1);
-  scoped_ptr<LayerImpl> child =
-      LayerImpl::Create(my_host_impl->active_tree(), 2);
-  scoped_ptr<LayerImpl> grand_child =
-      FakeLayerWithQuads::Create(my_host_impl->active_tree(), 3);
-
-  gfx::Rect root_rect(0, 0, 100, 100);
-  gfx::Rect child_rect(10, 10, 50, 50);
-  gfx::Rect grand_child_rect(5, 5, 150, 150);
-
-  root->SetHasRenderSurface(true);
-  root->SetPosition(root_rect.origin());
-  root->SetBounds(root_rect.size());
-  root->SetContentBounds(root->bounds());
-  root->draw_properties().visible_content_rect = root_rect;
-  root->SetDrawsContent(false);
-  root->render_surface()->SetContentRect(gfx::Rect(root_rect.size()));
-
-  child->SetPosition(gfx::PointF(child_rect.x(), child_rect.y()));
-  child->SetOpacity(0.5f);
-  child->SetBounds(gfx::Size(child_rect.width(), child_rect.height()));
-  child->SetContentBounds(child->bounds());
-  child->draw_properties().visible_content_rect = child_rect;
-  child->SetDrawsContent(false);
-  child->SetHasRenderSurface(true);
-
-  grand_child->SetPosition(grand_child_rect.origin());
-  grand_child->SetBounds(grand_child_rect.size());
-  grand_child->SetContentBounds(grand_child->bounds());
-  grand_child->draw_properties().visible_content_rect = grand_child_rect;
-  grand_child->SetDrawsContent(true);
-
-  child->AddChild(grand_child.Pass());
-  root->AddChild(child.Pass());
-
-  my_host_impl->active_tree()->SetRootLayer(root.Pass());
-  return my_host_impl.Pass();
-}
-
-TEST_F(LayerTreeHostImplTest, ContributingLayerEmptyScissorPartialSwap) {
-  scoped_ptr<SharedBitmapManager> shared_bitmap_manager(
-      new TestSharedBitmapManager());
-  scoped_ptr<LayerTreeHostImpl> my_host_impl =
-      SetupLayersForOpacity(true,
-                            this,
-                            &proxy_,
-                            shared_bitmap_manager.get(),
-                            &stats_instrumentation_);
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, my_host_impl->PrepareToDraw(&frame));
-
-    // Verify all quads have been computed
-    ASSERT_EQ(2U, frame.render_passes.size());
-    ASSERT_EQ(1U, frame.render_passes[0]->quad_list.size());
-    ASSERT_EQ(1U, frame.render_passes[1]->quad_list.size());
-    EXPECT_EQ(DrawQuad::SOLID_COLOR,
-              frame.render_passes[0]->quad_list.front()->material);
-    EXPECT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[1]->quad_list.front()->material);
-
-    my_host_impl->DrawLayers(&frame, gfx::FrameTime::Now());
-    my_host_impl->DidDrawAllLayers(frame);
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, ContributingLayerEmptyScissorNoPartialSwap) {
-  scoped_ptr<SharedBitmapManager> shared_bitmap_manager(
-      new TestSharedBitmapManager());
-  scoped_ptr<LayerTreeHostImpl> my_host_impl =
-      SetupLayersForOpacity(false,
-                            this,
-                            &proxy_,
-                            shared_bitmap_manager.get(),
-                            &stats_instrumentation_);
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, my_host_impl->PrepareToDraw(&frame));
-
-    // Verify all quads have been computed
-    ASSERT_EQ(2U, frame.render_passes.size());
-    ASSERT_EQ(1U, frame.render_passes[0]->quad_list.size());
-    ASSERT_EQ(1U, frame.render_passes[1]->quad_list.size());
-    EXPECT_EQ(DrawQuad::SOLID_COLOR,
-              frame.render_passes[0]->quad_list.front()->material);
-    EXPECT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[1]->quad_list.front()->material);
-
-    my_host_impl->DrawLayers(&frame, gfx::FrameTime::Now());
-    my_host_impl->DidDrawAllLayers(frame);
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, LayersFreeTextures) {
-  scoped_ptr<TestWebGraphicsContext3D> context =
-      TestWebGraphicsContext3D::Create();
-  TestWebGraphicsContext3D* context3d = context.get();
-  scoped_ptr<OutputSurface> output_surface(
-      FakeOutputSurface::Create3d(context.Pass()));
-  CreateHostImpl(DefaultSettings(), output_surface.Pass());
-
-  scoped_ptr<LayerImpl> root_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 1);
-  root_layer->SetBounds(gfx::Size(10, 10));
-  root_layer->SetHasRenderSurface(true);
-
-  scoped_ptr<IOSurfaceLayerImpl> io_surface_layer =
-      IOSurfaceLayerImpl::Create(host_impl_->active_tree(), 5);
-  io_surface_layer->SetBounds(gfx::Size(10, 10));
-  io_surface_layer->SetContentBounds(gfx::Size(10, 10));
-  io_surface_layer->SetDrawsContent(true);
-  io_surface_layer->SetIOSurfaceProperties(1, gfx::Size(10, 10));
-  root_layer->AddChild(io_surface_layer.Pass());
-
-  host_impl_->active_tree()->SetRootLayer(root_layer.Pass());
-
-  EXPECT_EQ(0u, context3d->NumTextures());
-
-  LayerTreeHostImpl::FrameData frame;
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-  host_impl_->SwapBuffers(frame);
-
-  EXPECT_GT(context3d->NumTextures(), 0u);
-
-  // Kill the layer tree.
-  host_impl_->active_tree()->SetRootLayer(
-      LayerImpl::Create(host_impl_->active_tree(), 100));
-  // There should be no textures left in use after.
-  EXPECT_EQ(0u, context3d->NumTextures());
-}
-
-class MockDrawQuadsToFillScreenContext : public TestWebGraphicsContext3D {
- public:
-  MOCK_METHOD1(useProgram, void(GLuint program));
-  MOCK_METHOD4(drawElements, void(GLenum mode,
-                                  GLsizei count,
-                                  GLenum type,
-                                  GLintptr offset));
-};
-
-TEST_F(LayerTreeHostImplTest, HasTransparentBackground) {
-  scoped_ptr<MockDrawQuadsToFillScreenContext> mock_context_owned(
-      new MockDrawQuadsToFillScreenContext);
-  MockDrawQuadsToFillScreenContext* mock_context = mock_context_owned.get();
-
-  // Run test case
-  LayerTreeSettings settings = DefaultSettings();
-  settings.renderer_settings.partial_swap_enabled = false;
-  CreateHostImpl(settings,
-                 FakeOutputSurface::Create3d(mock_context_owned.Pass()));
-  SetupRootLayerImpl(LayerImpl::Create(host_impl_->active_tree(), 1));
-  host_impl_->active_tree()->set_background_color(SK_ColorWHITE);
-
-  // Verify one quad is drawn when transparent background set is not set.
-  host_impl_->active_tree()->set_has_transparent_background(false);
-  EXPECT_CALL(*mock_context, useProgram(_))
-      .Times(1);
-  EXPECT_CALL(*mock_context, drawElements(_, _, _, _))
-      .Times(1);
-  LayerTreeHostImpl::FrameData frame;
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-  Mock::VerifyAndClearExpectations(&mock_context);
-
-  // Verify no quads are drawn when transparent background is set.
-  host_impl_->active_tree()->set_has_transparent_background(true);
-  host_impl_->SetFullRootLayerDamage();
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-  Mock::VerifyAndClearExpectations(&mock_context);
-}
-
-TEST_F(LayerTreeHostImplTest, ReleaseContentsTextureShouldTriggerCommit) {
-  set_reduce_memory_result(false);
-
-  // If changing the memory limit wouldn't result in changing what was
-  // committed, then no commit should be requested.
-  set_reduce_memory_result(false);
-  host_impl_->set_max_memory_needed_bytes(
-      host_impl_->memory_allocation_limit_bytes() - 1);
-  host_impl_->SetMemoryPolicy(ManagedMemoryPolicy(
-      host_impl_->memory_allocation_limit_bytes() - 1));
-  EXPECT_FALSE(did_request_commit_);
-  did_request_commit_ = false;
-
-  // If changing the memory limit would result in changing what was
-  // committed, then a commit should be requested, even though nothing was
-  // evicted.
-  set_reduce_memory_result(false);
-  host_impl_->set_max_memory_needed_bytes(
-      host_impl_->memory_allocation_limit_bytes());
-  host_impl_->SetMemoryPolicy(ManagedMemoryPolicy(
-      host_impl_->memory_allocation_limit_bytes() - 1));
-  EXPECT_TRUE(did_request_commit_);
-  did_request_commit_ = false;
-
-  // Especially if changing the memory limit caused evictions, we need
-  // to re-commit.
-  set_reduce_memory_result(true);
-  host_impl_->set_max_memory_needed_bytes(1);
-  host_impl_->SetMemoryPolicy(ManagedMemoryPolicy(
-      host_impl_->memory_allocation_limit_bytes() - 1));
-  EXPECT_TRUE(did_request_commit_);
-  did_request_commit_ = false;
-
-  // But if we set it to the same value that it was before, we shouldn't
-  // re-commit.
-  host_impl_->SetMemoryPolicy(ManagedMemoryPolicy(
-      host_impl_->memory_allocation_limit_bytes()));
-  EXPECT_FALSE(did_request_commit_);
-}
-
-class LayerTreeHostImplTestWithDelegatingRenderer
-    : public LayerTreeHostImplTest {
- protected:
-  scoped_ptr<OutputSurface> CreateOutputSurface() override {
-    return FakeOutputSurface::CreateDelegating3d();
-  }
-
-  void DrawFrameAndTestDamage(const gfx::RectF& expected_damage) {
-    bool expect_to_draw = !expected_damage.IsEmpty();
-
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    if (!expect_to_draw) {
-      // With no damage, we don't draw, and no quads are created.
-      ASSERT_EQ(0u, frame.render_passes.size());
-    } else {
-      ASSERT_EQ(1u, frame.render_passes.size());
-
-      // Verify the damage rect for the root render pass.
-      const RenderPass* root_render_pass = frame.render_passes.back();
-      EXPECT_EQ(expected_damage, root_render_pass->damage_rect);
-
-      // Verify the root and child layers' quads are generated and not being
-      // culled.
-      ASSERT_EQ(2u, root_render_pass->quad_list.size());
-
-      LayerImpl* child = host_impl_->active_tree()->root_layer()->children()[0];
-      gfx::RectF expected_child_visible_rect(child->content_bounds());
-      EXPECT_EQ(expected_child_visible_rect,
-                root_render_pass->quad_list.front()->visible_rect);
-
-      LayerImpl* root = host_impl_->active_tree()->root_layer();
-      gfx::RectF expected_root_visible_rect(root->content_bounds());
-      EXPECT_EQ(expected_root_visible_rect,
-                root_render_pass->quad_list.ElementAt(1)->visible_rect);
-    }
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-    EXPECT_EQ(expect_to_draw, host_impl_->SwapBuffers(frame));
-  }
-};
-
-TEST_F(LayerTreeHostImplTestWithDelegatingRenderer, FrameIncludesDamageRect) {
-  scoped_ptr<SolidColorLayerImpl> root =
-      SolidColorLayerImpl::Create(host_impl_->active_tree(), 1);
-  root->SetPosition(gfx::PointF());
-  root->SetBounds(gfx::Size(10, 10));
-  root->SetContentBounds(gfx::Size(10, 10));
-  root->SetDrawsContent(true);
-  root->SetHasRenderSurface(true);
-
-  // Child layer is in the bottom right corner.
-  scoped_ptr<SolidColorLayerImpl> child =
-      SolidColorLayerImpl::Create(host_impl_->active_tree(), 2);
-  child->SetPosition(gfx::PointF(9.f, 9.f));
-  child->SetBounds(gfx::Size(1, 1));
-  child->SetContentBounds(gfx::Size(1, 1));
-  child->SetDrawsContent(true);
-  root->AddChild(child.Pass());
-
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-
-  // Draw a frame. In the first frame, the entire viewport should be damaged.
-  gfx::Rect full_frame_damage(host_impl_->DrawViewportSize());
-  DrawFrameAndTestDamage(full_frame_damage);
-
-  // The second frame has damage that doesn't touch the child layer. Its quads
-  // should still be generated.
-  gfx::Rect small_damage = gfx::Rect(0, 0, 1, 1);
-  host_impl_->active_tree()->root_layer()->SetUpdateRect(small_damage);
-  DrawFrameAndTestDamage(small_damage);
-
-  // The third frame should have no damage, so no quads should be generated.
-  gfx::Rect no_damage;
-  DrawFrameAndTestDamage(no_damage);
-}
-
-// TODO(reveman): Remove this test and the ability to prevent on demand raster
-// when delegating renderer supports PictureDrawQuads. crbug.com/342121
-TEST_F(LayerTreeHostImplTestWithDelegatingRenderer, PreventRasterizeOnDemand) {
-  LayerTreeSettings settings;
-  CreateHostImpl(settings, CreateOutputSurface());
-  EXPECT_FALSE(host_impl_->GetRendererCapabilities().allow_rasterize_on_demand);
-}
-
-class FakeMaskLayerImpl : public LayerImpl {
- public:
-  static scoped_ptr<FakeMaskLayerImpl> Create(LayerTreeImpl* tree_impl,
-                                              int id) {
-    return make_scoped_ptr(new FakeMaskLayerImpl(tree_impl, id));
-  }
-
-  void GetContentsResourceId(ResourceProvider::ResourceId* resource_id,
-                             gfx::Size* resource_size) const override {
-    *resource_id = 0;
-  }
-
- private:
-  FakeMaskLayerImpl(LayerTreeImpl* tree_impl, int id)
-      : LayerImpl(tree_impl, id) {}
-};
-
-TEST_F(LayerTreeHostImplTest, MaskLayerWithScaling) {
-  LayerTreeSettings settings;
-  settings.layer_transforms_should_scale_layer_contents = true;
-  CreateHostImpl(settings, CreateOutputSurface());
-
-  // Root
-  //  |
-  //  +-- Scaling Layer (adds a 2x scale)
-  //       |
-  //       +-- Content Layer
-  //             +--Mask
-  scoped_ptr<LayerImpl> scoped_root =
-      LayerImpl::Create(host_impl_->active_tree(), 1);
-  LayerImpl* root = scoped_root.get();
-  root->SetHasRenderSurface(true);
-  host_impl_->active_tree()->SetRootLayer(scoped_root.Pass());
-
-  scoped_ptr<LayerImpl> scoped_scaling_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 2);
-  LayerImpl* scaling_layer = scoped_scaling_layer.get();
-  root->AddChild(scoped_scaling_layer.Pass());
-
-  scoped_ptr<LayerImpl> scoped_content_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  LayerImpl* content_layer = scoped_content_layer.get();
-  scaling_layer->AddChild(scoped_content_layer.Pass());
-
-  scoped_ptr<FakeMaskLayerImpl> scoped_mask_layer =
-      FakeMaskLayerImpl::Create(host_impl_->active_tree(), 4);
-  FakeMaskLayerImpl* mask_layer = scoped_mask_layer.get();
-  content_layer->SetHasRenderSurface(true);
-  content_layer->SetMaskLayer(scoped_mask_layer.Pass());
-
-  gfx::Size root_size(100, 100);
-  root->SetBounds(root_size);
-  root->SetContentBounds(root_size);
-  root->SetPosition(gfx::PointF());
-
-  gfx::Size scaling_layer_size(50, 50);
-  scaling_layer->SetBounds(scaling_layer_size);
-  scaling_layer->SetContentBounds(scaling_layer_size);
-  scaling_layer->SetPosition(gfx::PointF());
-  gfx::Transform scale;
-  scale.Scale(2.f, 2.f);
-  scaling_layer->SetTransform(scale);
-
-  content_layer->SetBounds(scaling_layer_size);
-  content_layer->SetContentBounds(scaling_layer_size);
-  content_layer->SetPosition(gfx::PointF());
-  content_layer->SetDrawsContent(true);
-
-  mask_layer->SetBounds(scaling_layer_size);
-  mask_layer->SetContentBounds(scaling_layer_size);
-  mask_layer->SetPosition(gfx::PointF());
-  mask_layer->SetDrawsContent(true);
-
-
-  // Check that the tree scaling is correctly taken into account for the mask,
-  // that should fully map onto the quad.
-  float device_scale_factor = 1.f;
-  host_impl_->SetViewportSize(root_size);
-  host_impl_->SetDeviceScaleFactor(device_scale_factor);
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    ASSERT_EQ(1u, frame.render_passes.size());
-    ASSERT_EQ(1u, frame.render_passes[0]->quad_list.size());
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.front()->material);
-    const RenderPassDrawQuad* render_pass_quad =
-        RenderPassDrawQuad::MaterialCast(
-            frame.render_passes[0]->quad_list.front());
-    EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
-              render_pass_quad->rect.ToString());
-    EXPECT_EQ(gfx::RectF(0.f, 0.f, 1.f, 1.f).ToString(),
-              render_pass_quad->MaskUVRect().ToString());
-    EXPECT_EQ(gfx::Vector2dF(1.f, 1.f).ToString(),
-              render_pass_quad->mask_uv_scale.ToString());
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-
-
-  // Applying a DSF should change the render surface size, but won't affect
-  // which part of the mask is used.
-  device_scale_factor = 2.f;
-  gfx::Size device_viewport =
-      gfx::ToFlooredSize(gfx::ScaleSize(root_size, device_scale_factor));
-  host_impl_->SetViewportSize(device_viewport);
-  host_impl_->SetDeviceScaleFactor(device_scale_factor);
-  host_impl_->active_tree()->set_needs_update_draw_properties();
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    ASSERT_EQ(1u, frame.render_passes.size());
-    ASSERT_EQ(1u, frame.render_passes[0]->quad_list.size());
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.front()->material);
-    const RenderPassDrawQuad* render_pass_quad =
-        RenderPassDrawQuad::MaterialCast(
-            frame.render_passes[0]->quad_list.front());
-    EXPECT_EQ(gfx::Rect(0, 0, 200, 200).ToString(),
-              render_pass_quad->rect.ToString());
-    EXPECT_EQ(gfx::RectF(0.f, 0.f, 1.f, 1.f).ToString(),
-              render_pass_quad->MaskUVRect().ToString());
-    EXPECT_EQ(gfx::Vector2dF(1.f, 1.f).ToString(),
-              render_pass_quad->mask_uv_scale.ToString());
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-
-
-  // Applying an equivalent content scale on the content layer and the mask
-  // should still result in the same part of the mask being used.
-  gfx::Size content_bounds =
-      gfx::ToRoundedSize(gfx::ScaleSize(scaling_layer_size,
-                                        device_scale_factor));
-  content_layer->SetContentBounds(content_bounds);
-  content_layer->SetContentsScale(device_scale_factor, device_scale_factor);
-  mask_layer->SetContentBounds(content_bounds);
-  mask_layer->SetContentsScale(device_scale_factor, device_scale_factor);
-  host_impl_->active_tree()->set_needs_update_draw_properties();
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    ASSERT_EQ(1u, frame.render_passes.size());
-    ASSERT_EQ(1u, frame.render_passes[0]->quad_list.size());
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.front()->material);
-    const RenderPassDrawQuad* render_pass_quad =
-        RenderPassDrawQuad::MaterialCast(
-            frame.render_passes[0]->quad_list.front());
-    EXPECT_EQ(gfx::Rect(0, 0, 200, 200).ToString(),
-              render_pass_quad->rect.ToString());
-    EXPECT_EQ(gfx::RectF(0.f, 0.f, 1.f, 1.f).ToString(),
-              render_pass_quad->MaskUVRect().ToString());
-    EXPECT_EQ(gfx::Vector2dF(1.f, 1.f).ToString(),
-              render_pass_quad->mask_uv_scale.ToString());
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, MaskLayerWithDifferentBounds) {
-  // The mask layer has bounds 100x100 but is attached to a layer with bounds
-  // 50x50.
-
-  scoped_ptr<LayerImpl> scoped_root =
-      LayerImpl::Create(host_impl_->active_tree(), 1);
-  LayerImpl* root = scoped_root.get();
-  root->SetHasRenderSurface(true);
-
-  host_impl_->active_tree()->SetRootLayer(scoped_root.Pass());
-
-  scoped_ptr<LayerImpl> scoped_content_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  LayerImpl* content_layer = scoped_content_layer.get();
-  root->AddChild(scoped_content_layer.Pass());
-
-  scoped_ptr<FakeMaskLayerImpl> scoped_mask_layer =
-      FakeMaskLayerImpl::Create(host_impl_->active_tree(), 4);
-  FakeMaskLayerImpl* mask_layer = scoped_mask_layer.get();
-  content_layer->SetMaskLayer(scoped_mask_layer.Pass());
-  content_layer->SetHasRenderSurface(true);
-
-  gfx::Size root_size(100, 100);
-  root->SetBounds(root_size);
-  root->SetContentBounds(root_size);
-  root->SetPosition(gfx::PointF());
-
-  gfx::Size layer_size(50, 50);
-  content_layer->SetBounds(layer_size);
-  content_layer->SetContentBounds(layer_size);
-  content_layer->SetPosition(gfx::PointF());
-  content_layer->SetDrawsContent(true);
-
-  gfx::Size mask_size(100, 100);
-  mask_layer->SetBounds(mask_size);
-  mask_layer->SetContentBounds(mask_size);
-  mask_layer->SetPosition(gfx::PointF());
-  mask_layer->SetDrawsContent(true);
-
-  // Check that the mask fills the surface.
-  float device_scale_factor = 1.f;
-  host_impl_->SetViewportSize(root_size);
-  host_impl_->SetDeviceScaleFactor(device_scale_factor);
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    ASSERT_EQ(1u, frame.render_passes.size());
-    ASSERT_EQ(1u, frame.render_passes[0]->quad_list.size());
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.front()->material);
-    const RenderPassDrawQuad* render_pass_quad =
-        RenderPassDrawQuad::MaterialCast(
-            frame.render_passes[0]->quad_list.front());
-    EXPECT_EQ(gfx::Rect(0, 0, 50, 50).ToString(),
-              render_pass_quad->rect.ToString());
-    EXPECT_EQ(gfx::RectF(0.f, 0.f, 1.f, 1.f).ToString(),
-              render_pass_quad->MaskUVRect().ToString());
-    EXPECT_EQ(gfx::Vector2dF(1.f, 1.f).ToString(),
-              render_pass_quad->mask_uv_scale.ToString());
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-
-  // Applying a DSF should change the render surface size, but won't affect
-  // which part of the mask is used.
-  device_scale_factor = 2.f;
-  gfx::Size device_viewport =
-      gfx::ToFlooredSize(gfx::ScaleSize(root_size, device_scale_factor));
-  host_impl_->SetViewportSize(device_viewport);
-  host_impl_->SetDeviceScaleFactor(device_scale_factor);
-  host_impl_->active_tree()->set_needs_update_draw_properties();
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    ASSERT_EQ(1u, frame.render_passes.size());
-    ASSERT_EQ(1u, frame.render_passes[0]->quad_list.size());
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.front()->material);
-    const RenderPassDrawQuad* render_pass_quad =
-        RenderPassDrawQuad::MaterialCast(
-            frame.render_passes[0]->quad_list.front());
-    EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
-              render_pass_quad->rect.ToString());
-    EXPECT_EQ(gfx::RectF(0.f, 0.f, 1.f, 1.f).ToString(),
-              render_pass_quad->MaskUVRect().ToString());
-    EXPECT_EQ(gfx::Vector2dF(1.f, 1.f).ToString(),
-              render_pass_quad->mask_uv_scale.ToString());
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-
-  // Applying an equivalent content scale on the content layer and the mask
-  // should still result in the same part of the mask being used.
-  gfx::Size layer_size_large =
-      gfx::ToRoundedSize(gfx::ScaleSize(layer_size, device_scale_factor));
-  content_layer->SetContentBounds(layer_size_large);
-  content_layer->SetContentsScale(device_scale_factor, device_scale_factor);
-  gfx::Size mask_size_large =
-      gfx::ToRoundedSize(gfx::ScaleSize(mask_size, device_scale_factor));
-  mask_layer->SetContentBounds(mask_size_large);
-  mask_layer->SetContentsScale(device_scale_factor, device_scale_factor);
-  host_impl_->active_tree()->set_needs_update_draw_properties();
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    ASSERT_EQ(1u, frame.render_passes.size());
-    ASSERT_EQ(1u, frame.render_passes[0]->quad_list.size());
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.front()->material);
-    const RenderPassDrawQuad* render_pass_quad =
-        RenderPassDrawQuad::MaterialCast(
-            frame.render_passes[0]->quad_list.front());
-    EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
-              render_pass_quad->rect.ToString());
-    EXPECT_EQ(gfx::RectF(0.f, 0.f, 1.f, 1.f).ToString(),
-              render_pass_quad->MaskUVRect().ToString());
-    EXPECT_EQ(gfx::Vector2dF(1.f, 1.f).ToString(),
-              render_pass_quad->mask_uv_scale.ToString());
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-
-  // Applying a different contents scale to the mask layer means it will have
-  // a larger texture, but it should use the same tex coords to cover the
-  // layer it masks.
-  mask_layer->SetContentBounds(mask_size);
-  mask_layer->SetContentsScale(1.f, 1.f);
-  host_impl_->active_tree()->set_needs_update_draw_properties();
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    ASSERT_EQ(1u, frame.render_passes.size());
-    ASSERT_EQ(1u, frame.render_passes[0]->quad_list.size());
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.front()->material);
-    const RenderPassDrawQuad* render_pass_quad =
-        RenderPassDrawQuad::MaterialCast(
-            frame.render_passes[0]->quad_list.front());
-    EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
-              render_pass_quad->rect.ToString());
-    EXPECT_EQ(gfx::RectF(0.f, 0.f, 1.f, 1.f).ToString(),
-              render_pass_quad->MaskUVRect().ToString());
-    EXPECT_EQ(gfx::Vector2dF(1.f, 1.f).ToString(),
-              render_pass_quad->mask_uv_scale.ToString());
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, ReflectionMaskLayerWithDifferentBounds) {
-  // The replica's mask layer has bounds 100x100 but the replica is of a
-  // layer with bounds 50x50.
-
-  scoped_ptr<LayerImpl> scoped_root =
-      LayerImpl::Create(host_impl_->active_tree(), 1);
-  LayerImpl* root = scoped_root.get();
-  root->SetHasRenderSurface(true);
-
-  host_impl_->active_tree()->SetRootLayer(scoped_root.Pass());
-
-  scoped_ptr<LayerImpl> scoped_content_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  LayerImpl* content_layer = scoped_content_layer.get();
-  root->AddChild(scoped_content_layer.Pass());
-
-  scoped_ptr<LayerImpl> scoped_replica_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 2);
-  LayerImpl* replica_layer = scoped_replica_layer.get();
-  content_layer->SetReplicaLayer(scoped_replica_layer.Pass());
-  content_layer->SetHasRenderSurface(true);
-
-  scoped_ptr<FakeMaskLayerImpl> scoped_mask_layer =
-      FakeMaskLayerImpl::Create(host_impl_->active_tree(), 4);
-  FakeMaskLayerImpl* mask_layer = scoped_mask_layer.get();
-  replica_layer->SetMaskLayer(scoped_mask_layer.Pass());
-  replica_layer->SetHasRenderSurface(true);
-
-  gfx::Size root_size(100, 100);
-  root->SetBounds(root_size);
-  root->SetContentBounds(root_size);
-  root->SetPosition(gfx::PointF());
-
-  gfx::Size layer_size(50, 50);
-  content_layer->SetBounds(layer_size);
-  content_layer->SetContentBounds(layer_size);
-  content_layer->SetPosition(gfx::PointF());
-  content_layer->SetDrawsContent(true);
-
-  gfx::Size mask_size(100, 100);
-  mask_layer->SetBounds(mask_size);
-  mask_layer->SetContentBounds(mask_size);
-  mask_layer->SetPosition(gfx::PointF());
-  mask_layer->SetDrawsContent(true);
-
-  // Check that the mask fills the surface.
-  float device_scale_factor = 1.f;
-  host_impl_->SetViewportSize(root_size);
-  host_impl_->SetDeviceScaleFactor(device_scale_factor);
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    ASSERT_EQ(1u, frame.render_passes.size());
-    ASSERT_EQ(2u, frame.render_passes[0]->quad_list.size());
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.ElementAt(1)->material);
-    const RenderPassDrawQuad* replica_quad = RenderPassDrawQuad::MaterialCast(
-        frame.render_passes[0]->quad_list.ElementAt(1));
-    EXPECT_EQ(gfx::Rect(0, 0, 50, 50).ToString(),
-              replica_quad->rect.ToString());
-    EXPECT_EQ(gfx::RectF(0.f, 0.f, 1.f, 1.f).ToString(),
-              replica_quad->MaskUVRect().ToString());
-    EXPECT_EQ(gfx::Vector2dF(1.f, 1.f).ToString(),
-              replica_quad->mask_uv_scale.ToString());
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-
-  // Applying a DSF should change the render surface size, but won't affect
-  // which part of the mask is used.
-  device_scale_factor = 2.f;
-  gfx::Size device_viewport =
-      gfx::ToFlooredSize(gfx::ScaleSize(root_size, device_scale_factor));
-  host_impl_->SetViewportSize(device_viewport);
-  host_impl_->SetDeviceScaleFactor(device_scale_factor);
-  host_impl_->active_tree()->set_needs_update_draw_properties();
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    ASSERT_EQ(1u, frame.render_passes.size());
-    ASSERT_EQ(2u, frame.render_passes[0]->quad_list.size());
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.ElementAt(1)->material);
-    const RenderPassDrawQuad* replica_quad = RenderPassDrawQuad::MaterialCast(
-        frame.render_passes[0]->quad_list.ElementAt(1));
-    EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
-              replica_quad->rect.ToString());
-    EXPECT_EQ(gfx::RectF(0.f, 0.f, 1.f, 1.f).ToString(),
-              replica_quad->MaskUVRect().ToString());
-    EXPECT_EQ(gfx::Vector2dF(1.f, 1.f).ToString(),
-              replica_quad->mask_uv_scale.ToString());
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-
-  // Applying an equivalent content scale on the content layer and the mask
-  // should still result in the same part of the mask being used.
-  gfx::Size layer_size_large =
-      gfx::ToRoundedSize(gfx::ScaleSize(layer_size, device_scale_factor));
-  content_layer->SetContentBounds(layer_size_large);
-  content_layer->SetContentsScale(device_scale_factor, device_scale_factor);
-  gfx::Size mask_size_large =
-      gfx::ToRoundedSize(gfx::ScaleSize(mask_size, device_scale_factor));
-  mask_layer->SetContentBounds(mask_size_large);
-  mask_layer->SetContentsScale(device_scale_factor, device_scale_factor);
-  host_impl_->active_tree()->set_needs_update_draw_properties();
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    ASSERT_EQ(1u, frame.render_passes.size());
-    ASSERT_EQ(2u, frame.render_passes[0]->quad_list.size());
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.ElementAt(1)->material);
-    const RenderPassDrawQuad* replica_quad = RenderPassDrawQuad::MaterialCast(
-        frame.render_passes[0]->quad_list.ElementAt(1));
-    EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
-              replica_quad->rect.ToString());
-    EXPECT_EQ(gfx::RectF(0.f, 0.f, 1.f, 1.f).ToString(),
-              replica_quad->MaskUVRect().ToString());
-    EXPECT_EQ(gfx::Vector2dF(1.f, 1.f).ToString(),
-              replica_quad->mask_uv_scale.ToString());
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-
-  // Applying a different contents scale to the mask layer means it will have
-  // a larger texture, but it should use the same tex coords to cover the
-  // layer it masks.
-  mask_layer->SetContentBounds(mask_size);
-  mask_layer->SetContentsScale(1.f, 1.f);
-  host_impl_->active_tree()->set_needs_update_draw_properties();
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    ASSERT_EQ(1u, frame.render_passes.size());
-    ASSERT_EQ(2u, frame.render_passes[0]->quad_list.size());
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.ElementAt(1)->material);
-    const RenderPassDrawQuad* replica_quad = RenderPassDrawQuad::MaterialCast(
-        frame.render_passes[0]->quad_list.ElementAt(1));
-    EXPECT_EQ(gfx::Rect(0, 0, 100, 100).ToString(),
-              replica_quad->rect.ToString());
-    EXPECT_EQ(gfx::RectF(0.f, 0.f, 1.f, 1.f).ToString(),
-              replica_quad->MaskUVRect().ToString());
-    EXPECT_EQ(gfx::Vector2dF(1.f, 1.f).ToString(),
-              replica_quad->mask_uv_scale.ToString());
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, ReflectionMaskLayerForSurfaceWithUnclippedChild) {
-  // The replica is of a layer with bounds 50x50, but it has a child that causes
-  // the surface bounds to be larger.
-
-  scoped_ptr<LayerImpl> scoped_root =
-      LayerImpl::Create(host_impl_->active_tree(), 1);
-  LayerImpl* root = scoped_root.get();
-  root->SetHasRenderSurface(true);
-  host_impl_->active_tree()->SetRootLayer(scoped_root.Pass());
-
-  scoped_ptr<LayerImpl> scoped_content_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 2);
-  LayerImpl* content_layer = scoped_content_layer.get();
-  root->AddChild(scoped_content_layer.Pass());
-
-  scoped_ptr<LayerImpl> scoped_content_child_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  LayerImpl* content_child_layer = scoped_content_child_layer.get();
-  content_layer->AddChild(scoped_content_child_layer.Pass());
-
-  scoped_ptr<LayerImpl> scoped_replica_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 4);
-  LayerImpl* replica_layer = scoped_replica_layer.get();
-  content_layer->SetReplicaLayer(scoped_replica_layer.Pass());
-  content_layer->SetHasRenderSurface(true);
-
-  scoped_ptr<FakeMaskLayerImpl> scoped_mask_layer =
-      FakeMaskLayerImpl::Create(host_impl_->active_tree(), 5);
-  FakeMaskLayerImpl* mask_layer = scoped_mask_layer.get();
-  replica_layer->SetMaskLayer(scoped_mask_layer.Pass());
-  replica_layer->SetHasRenderSurface(true);
-
-  gfx::Size root_size(100, 100);
-  root->SetBounds(root_size);
-  root->SetContentBounds(root_size);
-  root->SetPosition(gfx::PointF());
-
-  gfx::Size layer_size(50, 50);
-  content_layer->SetBounds(layer_size);
-  content_layer->SetContentBounds(layer_size);
-  content_layer->SetPosition(gfx::PointF());
-  content_layer->SetDrawsContent(true);
-
-  gfx::Size child_size(50, 50);
-  content_child_layer->SetBounds(child_size);
-  content_child_layer->SetContentBounds(child_size);
-  content_child_layer->SetPosition(gfx::Point(50, 0));
-  content_child_layer->SetDrawsContent(true);
-
-  gfx::Size mask_size(50, 50);
-  mask_layer->SetBounds(mask_size);
-  mask_layer->SetContentBounds(mask_size);
-  mask_layer->SetPosition(gfx::PointF());
-  mask_layer->SetDrawsContent(true);
-
-  float device_scale_factor = 1.f;
-  host_impl_->SetViewportSize(root_size);
-  host_impl_->SetDeviceScaleFactor(device_scale_factor);
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    ASSERT_EQ(1u, frame.render_passes.size());
-    ASSERT_EQ(2u, frame.render_passes[0]->quad_list.size());
-
-    // The surface is 100x50.
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.front()->material);
-    const RenderPassDrawQuad* render_pass_quad =
-        RenderPassDrawQuad::MaterialCast(
-            frame.render_passes[0]->quad_list.front());
-    EXPECT_EQ(gfx::Rect(0, 0, 100, 50).ToString(),
-              render_pass_quad->rect.ToString());
-
-    // The mask covers the owning layer only.
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.ElementAt(1)->material);
-    const RenderPassDrawQuad* replica_quad = RenderPassDrawQuad::MaterialCast(
-        frame.render_passes[0]->quad_list.ElementAt(1));
-    EXPECT_EQ(gfx::Rect(0, 0, 100, 50).ToString(),
-              replica_quad->rect.ToString());
-    EXPECT_EQ(gfx::RectF(0.f, 0.f, 2.f, 1.f).ToString(),
-              replica_quad->MaskUVRect().ToString());
-    EXPECT_EQ(gfx::Vector2dF(2.f, 1.f).ToString(),
-              replica_quad->mask_uv_scale.ToString());
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-
-  // Move the child to (-50, 0) instead. Now the mask should be moved to still
-  // cover the layer being replicated.
-  content_child_layer->SetPosition(gfx::Point(-50, 0));
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    ASSERT_EQ(1u, frame.render_passes.size());
-    ASSERT_EQ(2u, frame.render_passes[0]->quad_list.size());
-
-    // The surface is 100x50 with its origin at (-50, 0).
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.front()->material);
-    const RenderPassDrawQuad* render_pass_quad =
-        RenderPassDrawQuad::MaterialCast(
-            frame.render_passes[0]->quad_list.front());
-    EXPECT_EQ(gfx::Rect(-50, 0, 100, 50).ToString(),
-              render_pass_quad->rect.ToString());
-
-    // The mask covers the owning layer only.
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.ElementAt(1)->material);
-    const RenderPassDrawQuad* replica_quad = RenderPassDrawQuad::MaterialCast(
-        frame.render_passes[0]->quad_list.ElementAt(1));
-    EXPECT_EQ(gfx::Rect(-50, 0, 100, 50).ToString(),
-              replica_quad->rect.ToString());
-    EXPECT_EQ(gfx::RectF(-1.f, 0.f, 2.f, 1.f).ToString(),
-              replica_quad->MaskUVRect().ToString());
-    EXPECT_EQ(gfx::Vector2dF(2.f, 1.f).ToString(),
-              replica_quad->mask_uv_scale.ToString());
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, MaskLayerForSurfaceWithClippedLayer) {
-  // The masked layer has bounds 50x50, but it has a child that causes
-  // the surface bounds to be larger. It also has a parent that clips the
-  // masked layer and its surface.
-
-  scoped_ptr<LayerImpl> scoped_root =
-      LayerImpl::Create(host_impl_->active_tree(), 1);
-  LayerImpl* root = scoped_root.get();
-  root->SetHasRenderSurface(true);
-
-  host_impl_->active_tree()->SetRootLayer(scoped_root.Pass());
-
-  scoped_ptr<LayerImpl> scoped_clipping_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 2);
-  LayerImpl* clipping_layer = scoped_clipping_layer.get();
-  root->AddChild(scoped_clipping_layer.Pass());
-
-  scoped_ptr<LayerImpl> scoped_content_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  LayerImpl* content_layer = scoped_content_layer.get();
-  clipping_layer->AddChild(scoped_content_layer.Pass());
-
-  scoped_ptr<LayerImpl> scoped_content_child_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 4);
-  LayerImpl* content_child_layer = scoped_content_child_layer.get();
-  content_layer->AddChild(scoped_content_child_layer.Pass());
-
-  scoped_ptr<FakeMaskLayerImpl> scoped_mask_layer =
-      FakeMaskLayerImpl::Create(host_impl_->active_tree(), 6);
-  FakeMaskLayerImpl* mask_layer = scoped_mask_layer.get();
-  content_layer->SetMaskLayer(scoped_mask_layer.Pass());
-  content_layer->SetHasRenderSurface(true);
-
-  gfx::Size root_size(100, 100);
-  root->SetBounds(root_size);
-  root->SetContentBounds(root_size);
-  root->SetPosition(gfx::PointF());
-
-  gfx::Rect clipping_rect(20, 10, 10, 20);
-  clipping_layer->SetBounds(clipping_rect.size());
-  clipping_layer->SetContentBounds(clipping_rect.size());
-  clipping_layer->SetPosition(clipping_rect.origin());
-  clipping_layer->SetMasksToBounds(true);
-
-  gfx::Size layer_size(50, 50);
-  content_layer->SetBounds(layer_size);
-  content_layer->SetContentBounds(layer_size);
-  content_layer->SetPosition(gfx::Point() - clipping_rect.OffsetFromOrigin());
-  content_layer->SetDrawsContent(true);
-
-  gfx::Size child_size(50, 50);
-  content_child_layer->SetBounds(child_size);
-  content_child_layer->SetContentBounds(child_size);
-  content_child_layer->SetPosition(gfx::Point(50, 0));
-  content_child_layer->SetDrawsContent(true);
-
-  gfx::Size mask_size(100, 100);
-  mask_layer->SetBounds(mask_size);
-  mask_layer->SetContentBounds(mask_size);
-  mask_layer->SetPosition(gfx::PointF());
-  mask_layer->SetDrawsContent(true);
-
-  float device_scale_factor = 1.f;
-  host_impl_->SetViewportSize(root_size);
-  host_impl_->SetDeviceScaleFactor(device_scale_factor);
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-    ASSERT_EQ(1u, frame.render_passes.size());
-    ASSERT_EQ(1u, frame.render_passes[0]->quad_list.size());
-
-    // The surface is clipped to 10x20.
-    ASSERT_EQ(DrawQuad::RENDER_PASS,
-              frame.render_passes[0]->quad_list.front()->material);
-    const RenderPassDrawQuad* render_pass_quad =
-        RenderPassDrawQuad::MaterialCast(
-            frame.render_passes[0]->quad_list.front());
-    EXPECT_EQ(gfx::Rect(20, 10, 10, 20).ToString(),
-              render_pass_quad->rect.ToString());
-    // The masked layer is 50x50, but the surface size is 10x20. So the texture
-    // coords in the mask are scaled by 10/50 and 20/50.
-    // The surface is clipped to (20,10) so the mask texture coords are offset
-    // by 20/50 and 10/50
-    EXPECT_EQ(gfx::ScaleRect(gfx::RectF(20.f, 10.f, 10.f, 20.f), 1.f / 50.f)
-                  .ToString(),
-              render_pass_quad->MaskUVRect().ToString());
-    EXPECT_EQ(gfx::Vector2dF(10.f / 50.f, 20.f / 50.f).ToString(),
-              render_pass_quad->mask_uv_scale.ToString());
-
-    host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-}
-
-class GLRendererWithSetupQuadForAntialiasing : public GLRenderer {
- public:
-  using GLRenderer::ShouldAntialiasQuad;
-};
-
-TEST_F(LayerTreeHostImplTest, FarAwayQuadsDontNeedAA) {
-  // Due to precision issues (especially on Android), sometimes far
-  // away quads can end up thinking they need AA.
-  float device_scale_factor = 4.f / 3.f;
-  host_impl_->SetDeviceScaleFactor(device_scale_factor);
-  gfx::Size root_size(2000, 1000);
-  gfx::Size device_viewport_size =
-      gfx::ToCeiledSize(gfx::ScaleSize(root_size, device_scale_factor));
-  host_impl_->SetViewportSize(device_viewport_size);
-
-  host_impl_->CreatePendingTree();
-  host_impl_->pending_tree()->PushPageScaleFromMainThread(1.f, 1.f / 16.f,
-                                                          16.f);
-
-  scoped_ptr<LayerImpl> scoped_root =
-      LayerImpl::Create(host_impl_->pending_tree(), 1);
-  LayerImpl* root = scoped_root.get();
-  root->SetHasRenderSurface(true);
-
-  host_impl_->pending_tree()->SetRootLayer(scoped_root.Pass());
-
-  scoped_ptr<LayerImpl> scoped_scrolling_layer =
-      LayerImpl::Create(host_impl_->pending_tree(), 2);
-  LayerImpl* scrolling_layer = scoped_scrolling_layer.get();
-  root->AddChild(scoped_scrolling_layer.Pass());
-
-  gfx::Size content_layer_bounds(100000, 100);
-  gfx::Size pile_tile_size(3000, 3000);
-  scoped_refptr<FakePicturePileImpl> pile(FakePicturePileImpl::CreateFilledPile(
-      pile_tile_size, content_layer_bounds));
-
-  scoped_ptr<FakePictureLayerImpl> scoped_content_layer =
-      FakePictureLayerImpl::CreateWithRasterSource(host_impl_->pending_tree(),
-                                                   3, pile);
-  LayerImpl* content_layer = scoped_content_layer.get();
-  scrolling_layer->AddChild(scoped_content_layer.Pass());
-  content_layer->SetBounds(content_layer_bounds);
-  content_layer->SetDrawsContent(true);
-
-  root->SetBounds(root_size);
-
-  gfx::ScrollOffset scroll_offset(100000, 0);
-  scrolling_layer->SetScrollClipLayer(root->id());
-  scrolling_layer->PushScrollOffsetFromMainThread(scroll_offset);
-
-  host_impl_->ActivateSyncTree();
-
-  bool update_lcd_text = false;
-  host_impl_->active_tree()->UpdateDrawProperties(update_lcd_text);
-  ASSERT_EQ(1u, host_impl_->active_tree()->RenderSurfaceLayerList().size());
-
-  LayerTreeHostImpl::FrameData frame;
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-
-  ASSERT_EQ(1u, frame.render_passes.size());
-  ASSERT_LE(1u, frame.render_passes[0]->quad_list.size());
-  const DrawQuad* quad = frame.render_passes[0]->quad_list.front();
-
-  bool antialiased =
-      GLRendererWithSetupQuadForAntialiasing::ShouldAntialiasQuad(
-          quad->quadTransform(), quad, false);
-  EXPECT_FALSE(antialiased);
-
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-}
-
-
-class CompositorFrameMetadataTest : public LayerTreeHostImplTest {
- public:
-  CompositorFrameMetadataTest()
-      : swap_buffers_complete_(0) {}
-
-  void DidSwapBuffersCompleteOnImplThread() override {
-    swap_buffers_complete_++;
-  }
-
-  int swap_buffers_complete_;
-};
-
-TEST_F(CompositorFrameMetadataTest, CompositorFrameAckCountsAsSwapComplete) {
-  SetupRootLayerImpl(FakeLayerWithQuads::Create(host_impl_->active_tree(), 1));
-  {
-    LayerTreeHostImpl::FrameData frame;
-    EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-    host_impl_->DrawLayers(&frame, base::TimeTicks());
-    host_impl_->DidDrawAllLayers(frame);
-  }
-  CompositorFrameAck ack;
-  host_impl_->ReclaimResources(&ack);
-  host_impl_->DidSwapBuffersComplete();
-  EXPECT_EQ(swap_buffers_complete_, 1);
-}
-
-class CountingSoftwareDevice : public SoftwareOutputDevice {
- public:
-  CountingSoftwareDevice() : frames_began_(0), frames_ended_(0) {}
-
-  SkCanvas* BeginPaint(const gfx::Rect& damage_rect) override {
-    ++frames_began_;
-    return SoftwareOutputDevice::BeginPaint(damage_rect);
-  }
-  void EndPaint(SoftwareFrameData* frame_data) override {
-    ++frames_ended_;
-    SoftwareOutputDevice::EndPaint(frame_data);
-  }
-
-  int frames_began_, frames_ended_;
-};
-
-TEST_F(LayerTreeHostImplTest, ForcedDrawToSoftwareDeviceBasicRender) {
-  // No main thread evictions in resourceless software mode.
-  set_reduce_memory_result(false);
-  CountingSoftwareDevice* software_device = new CountingSoftwareDevice();
-  bool delegated_rendering = false;
-  FakeOutputSurface* output_surface =
-      FakeOutputSurface::CreateDeferredGL(
-          scoped_ptr<SoftwareOutputDevice>(software_device),
-          delegated_rendering).release();
-  EXPECT_TRUE(CreateHostImpl(DefaultSettings(),
-                             scoped_ptr<OutputSurface>(output_surface)));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-
-  const gfx::Transform external_transform;
-  const gfx::Rect external_viewport;
-  const gfx::Rect external_clip;
-  const bool resourceless_software_draw = true;
-  host_impl_->SetExternalDrawConstraints(external_transform,
-                                         external_viewport,
-                                         external_clip,
-                                         external_viewport,
-                                         external_transform,
-                                         resourceless_software_draw);
-
-  EXPECT_EQ(0, software_device->frames_began_);
-  EXPECT_EQ(0, software_device->frames_ended_);
-
-  DrawFrame();
-
-  EXPECT_EQ(1, software_device->frames_began_);
-  EXPECT_EQ(1, software_device->frames_ended_);
-
-  // Call another API method that is likely to hit nullptr in this mode.
-  scoped_refptr<base::trace_event::TracedValue> state =
-      make_scoped_refptr(new base::trace_event::TracedValue());
-  host_impl_->ActivationStateAsValueInto(state.get());
-}
-
-TEST_F(LayerTreeHostImplTest,
-       ForcedDrawToSoftwareDeviceSkipsUnsupportedLayers) {
-  set_reduce_memory_result(false);
-  bool delegated_rendering = false;
-  FakeOutputSurface* output_surface =
-      FakeOutputSurface::CreateDeferredGL(
-          scoped_ptr<SoftwareOutputDevice>(new CountingSoftwareDevice()),
-          delegated_rendering).release();
-  EXPECT_TRUE(CreateHostImpl(DefaultSettings(),
-                             scoped_ptr<OutputSurface>(output_surface)));
-
-  const gfx::Transform external_transform;
-  const gfx::Rect external_viewport;
-  const gfx::Rect external_clip;
-  const bool resourceless_software_draw = true;
-  host_impl_->SetExternalDrawConstraints(external_transform,
-                                         external_viewport,
-                                         external_clip,
-                                         external_viewport,
-                                         external_transform,
-                                         resourceless_software_draw);
-
-  // SolidColorLayerImpl will be drawn.
-  scoped_ptr<SolidColorLayerImpl> root_layer =
-      SolidColorLayerImpl::Create(host_impl_->active_tree(), 1);
-
-  LayerTreeHostImpl::FrameData frame;
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-
-  EXPECT_EQ(1u, frame.will_draw_layers.size());
-  EXPECT_EQ(host_impl_->active_tree()->root_layer(), frame.will_draw_layers[0]);
-}
-
-class LayerTreeHostImplTestDeferredInitialize : public LayerTreeHostImplTest {
- protected:
-  void SetUp() override {
-    LayerTreeHostImplTest::SetUp();
-
-    set_reduce_memory_result(false);
-
-    bool delegated_rendering = false;
-    scoped_ptr<FakeOutputSurface> output_surface(
-        FakeOutputSurface::CreateDeferredGL(
-            scoped_ptr<SoftwareOutputDevice>(new CountingSoftwareDevice()),
-            delegated_rendering));
-    output_surface_ = output_surface.get();
-
-    EXPECT_TRUE(CreateHostImpl(DefaultSettings(), output_surface.Pass()));
-
-    scoped_ptr<SolidColorLayerImpl> root_layer =
-        SolidColorLayerImpl::Create(host_impl_->active_tree(), 1);
-    SetupRootLayerImpl(root_layer.Pass());
-
-    onscreen_context_provider_ = TestContextProvider::Create();
-  }
-
-  void UpdateRendererCapabilitiesOnImplThread() override {
-    did_update_renderer_capabilities_ = true;
-  }
-
-  FakeOutputSurface* output_surface_;
-  scoped_refptr<TestContextProvider> onscreen_context_provider_;
-  bool did_update_renderer_capabilities_;
-};
-
-
-TEST_F(LayerTreeHostImplTestDeferredInitialize, Success) {
-  // Software draw.
-  DrawFrame();
-
-  EXPECT_FALSE(host_impl_->output_surface()->context_provider());
-
-  // DeferredInitialize and hardware draw.
-  did_update_renderer_capabilities_ = false;
-  EXPECT_TRUE(output_surface_->InitializeAndSetContext3d(
-      onscreen_context_provider_, nullptr));
-  EXPECT_EQ(onscreen_context_provider_.get(),
-            host_impl_->output_surface()->context_provider());
-  EXPECT_TRUE(did_update_renderer_capabilities_);
-
-  // Defer intialized GL draw.
-  DrawFrame();
-
-  // Revert back to software.
-  did_update_renderer_capabilities_ = false;
-  output_surface_->ReleaseGL();
-  EXPECT_FALSE(host_impl_->output_surface()->context_provider());
-  EXPECT_TRUE(did_update_renderer_capabilities_);
-
-  // Software draw again.
-  DrawFrame();
-}
-
-TEST_F(LayerTreeHostImplTestDeferredInitialize, Fails) {
-  // Software draw.
-  DrawFrame();
-
-  // Fail initialization of the onscreen context before the OutputSurface binds
-  // it to the thread.
-  onscreen_context_provider_->UnboundTestContext3d()->set_context_lost(true);
-
-  EXPECT_FALSE(host_impl_->output_surface()->context_provider());
-
-  // DeferredInitialize fails.
-  did_update_renderer_capabilities_ = false;
-  EXPECT_FALSE(output_surface_->InitializeAndSetContext3d(
-      onscreen_context_provider_, nullptr));
-  EXPECT_FALSE(host_impl_->output_surface()->context_provider());
-  EXPECT_FALSE(did_update_renderer_capabilities_);
-
-  // Software draw again.
-  DrawFrame();
-}
-
-// Checks that we have a non-0 default allocation if we pass a context that
-// doesn't support memory management extensions.
-TEST_F(LayerTreeHostImplTest, DefaultMemoryAllocation) {
-  LayerTreeSettings settings;
-  host_impl_ = LayerTreeHostImpl::Create(
-      settings, this, &proxy_, &stats_instrumentation_,
-      shared_bitmap_manager_.get(), gpu_memory_buffer_manager_.get(),
-      task_graph_runner_.get(), 0);
-
-  scoped_ptr<OutputSurface> output_surface(
-      FakeOutputSurface::Create3d(TestWebGraphicsContext3D::Create()));
-  host_impl_->InitializeRenderer(output_surface.Pass());
-  EXPECT_LT(0ul, host_impl_->memory_allocation_limit_bytes());
-}
-
-TEST_F(LayerTreeHostImplTest, MemoryPolicy) {
-  ManagedMemoryPolicy policy1(
-      456, gpu::MemoryAllocation::CUTOFF_ALLOW_EVERYTHING, 1000);
-  int everything_cutoff_value = ManagedMemoryPolicy::PriorityCutoffToValue(
-      gpu::MemoryAllocation::CUTOFF_ALLOW_EVERYTHING);
-  int allow_nice_to_have_cutoff_value =
-      ManagedMemoryPolicy::PriorityCutoffToValue(
-          gpu::MemoryAllocation::CUTOFF_ALLOW_NICE_TO_HAVE);
-  int nothing_cutoff_value = ManagedMemoryPolicy::PriorityCutoffToValue(
-      gpu::MemoryAllocation::CUTOFF_ALLOW_NOTHING);
-
-  // GPU rasterization should be disabled by default on the tree(s)
-  EXPECT_FALSE(host_impl_->active_tree()->use_gpu_rasterization());
-  EXPECT_TRUE(host_impl_->pending_tree() == NULL);
-
-  host_impl_->SetVisible(true);
-  host_impl_->SetMemoryPolicy(policy1);
-  EXPECT_EQ(policy1.bytes_limit_when_visible, current_limit_bytes_);
-  EXPECT_EQ(everything_cutoff_value, current_priority_cutoff_value_);
-
-  host_impl_->SetVisible(false);
-  EXPECT_EQ(0u, current_limit_bytes_);
-  EXPECT_EQ(nothing_cutoff_value, current_priority_cutoff_value_);
-
-  host_impl_->SetVisible(true);
-  EXPECT_EQ(policy1.bytes_limit_when_visible, current_limit_bytes_);
-  EXPECT_EQ(everything_cutoff_value, current_priority_cutoff_value_);
-
-  // Now enable GPU rasterization and test if we get nice to have cutoff,
-  // when visible.
-  LayerTreeSettings settings;
-  settings.gpu_rasterization_enabled = true;
-  host_impl_ = LayerTreeHostImpl::Create(
-      settings, this, &proxy_, &stats_instrumentation_, NULL, NULL, NULL, 0);
-  host_impl_->SetUseGpuRasterization(true);
-  host_impl_->SetVisible(true);
-  host_impl_->SetMemoryPolicy(policy1);
-  EXPECT_EQ(policy1.bytes_limit_when_visible, current_limit_bytes_);
-  EXPECT_EQ(allow_nice_to_have_cutoff_value, current_priority_cutoff_value_);
-
-  host_impl_->SetVisible(false);
-  EXPECT_EQ(0u, current_limit_bytes_);
-  EXPECT_EQ(nothing_cutoff_value, current_priority_cutoff_value_);
-}
-
-TEST_F(LayerTreeHostImplTest, RequireHighResWhenVisible) {
-  ASSERT_TRUE(host_impl_->active_tree());
-
-  // RequiresHighResToDraw is set when new output surface is used.
-  EXPECT_TRUE(host_impl_->RequiresHighResToDraw());
-
-  host_impl_->ResetRequiresHighResToDraw();
-
-  host_impl_->SetVisible(false);
-  EXPECT_FALSE(host_impl_->RequiresHighResToDraw());
-  host_impl_->SetVisible(true);
-  EXPECT_TRUE(host_impl_->RequiresHighResToDraw());
-  host_impl_->SetVisible(false);
-  EXPECT_TRUE(host_impl_->RequiresHighResToDraw());
-
-  host_impl_->ResetRequiresHighResToDraw();
-
-  EXPECT_FALSE(host_impl_->RequiresHighResToDraw());
-  host_impl_->SetVisible(true);
-  EXPECT_TRUE(host_impl_->RequiresHighResToDraw());
-}
-
-TEST_F(LayerTreeHostImplTest, RequireHighResAfterGpuRasterizationToggles) {
-  ASSERT_TRUE(host_impl_->active_tree());
-  EXPECT_FALSE(host_impl_->use_gpu_rasterization());
-
-  // RequiresHighResToDraw is set when new output surface is used.
-  EXPECT_TRUE(host_impl_->RequiresHighResToDraw());
-
-  host_impl_->ResetRequiresHighResToDraw();
-
-  host_impl_->SetUseGpuRasterization(false);
-  EXPECT_FALSE(host_impl_->RequiresHighResToDraw());
-  host_impl_->SetUseGpuRasterization(true);
-  EXPECT_TRUE(host_impl_->RequiresHighResToDraw());
-  host_impl_->SetUseGpuRasterization(false);
-  EXPECT_TRUE(host_impl_->RequiresHighResToDraw());
-
-  host_impl_->ResetRequiresHighResToDraw();
-
-  EXPECT_FALSE(host_impl_->RequiresHighResToDraw());
-  host_impl_->SetUseGpuRasterization(true);
-  EXPECT_TRUE(host_impl_->RequiresHighResToDraw());
-}
-
-class LayerTreeHostImplTestPrepareTiles : public LayerTreeHostImplTest {
- public:
-  void SetUp() override {
-    LayerTreeSettings settings;
-    settings.impl_side_painting = true;
-
-    fake_host_impl_ = new FakeLayerTreeHostImpl(settings, &proxy_,
-                                                shared_bitmap_manager_.get(),
-                                                task_graph_runner_.get());
-    host_impl_.reset(fake_host_impl_);
-    host_impl_->InitializeRenderer(CreateOutputSurface());
-    host_impl_->SetViewportSize(gfx::Size(10, 10));
-  }
-
-  FakeLayerTreeHostImpl* fake_host_impl_;
-};
-
-TEST_F(LayerTreeHostImplTestPrepareTiles, PrepareTilesWhenInvisible) {
-  fake_host_impl_->DidModifyTilePriorities();
-  EXPECT_TRUE(fake_host_impl_->prepare_tiles_needed());
-  fake_host_impl_->SetVisible(false);
-  EXPECT_FALSE(fake_host_impl_->prepare_tiles_needed());
-}
-
-TEST_F(LayerTreeHostImplTest, UIResourceManagement) {
-  scoped_ptr<TestWebGraphicsContext3D> context =
-      TestWebGraphicsContext3D::Create();
-  TestWebGraphicsContext3D* context3d = context.get();
-  scoped_ptr<FakeOutputSurface> output_surface = FakeOutputSurface::Create3d();
-  CreateHostImpl(DefaultSettings(), output_surface.Pass());
-
-  EXPECT_EQ(0u, context3d->NumTextures());
-
-  UIResourceId ui_resource_id = 1;
-  bool is_opaque = false;
-  UIResourceBitmap bitmap(gfx::Size(1, 1), is_opaque);
-  host_impl_->CreateUIResource(ui_resource_id, bitmap);
-  EXPECT_EQ(1u, context3d->NumTextures());
-  ResourceProvider::ResourceId id1 =
-      host_impl_->ResourceIdForUIResource(ui_resource_id);
-  EXPECT_NE(0u, id1);
-
-  // Multiple requests with the same id is allowed.  The previous texture is
-  // deleted.
-  host_impl_->CreateUIResource(ui_resource_id, bitmap);
-  EXPECT_EQ(1u, context3d->NumTextures());
-  ResourceProvider::ResourceId id2 =
-      host_impl_->ResourceIdForUIResource(ui_resource_id);
-  EXPECT_NE(0u, id2);
-  EXPECT_NE(id1, id2);
-
-  // Deleting invalid UIResourceId is allowed and does not change state.
-  host_impl_->DeleteUIResource(-1);
-  EXPECT_EQ(1u, context3d->NumTextures());
-
-  // Should return zero for invalid UIResourceId.  Number of textures should
-  // not change.
-  EXPECT_EQ(0u, host_impl_->ResourceIdForUIResource(-1));
-  EXPECT_EQ(1u, context3d->NumTextures());
-
-  host_impl_->DeleteUIResource(ui_resource_id);
-  EXPECT_EQ(0u, host_impl_->ResourceIdForUIResource(ui_resource_id));
-  EXPECT_EQ(0u, context3d->NumTextures());
-
-  // Should not change state for multiple deletion on one UIResourceId
-  host_impl_->DeleteUIResource(ui_resource_id);
-  EXPECT_EQ(0u, context3d->NumTextures());
-}
-
-TEST_F(LayerTreeHostImplTest, CreateETC1UIResource) {
-  scoped_ptr<TestWebGraphicsContext3D> context =
-      TestWebGraphicsContext3D::Create();
-  TestWebGraphicsContext3D* context3d = context.get();
-  CreateHostImpl(DefaultSettings(), FakeOutputSurface::Create3d());
-
-  EXPECT_EQ(0u, context3d->NumTextures());
-
-  gfx::Size size(4, 4);
-  // SkImageInfo has no support for ETC1.  The |info| below contains the right
-  // total pixel size for the bitmap but not the right height and width.  The
-  // correct width/height are passed directly to UIResourceBitmap.
-  SkImageInfo info =
-      SkImageInfo::Make(4, 2, kAlpha_8_SkColorType, kPremul_SkAlphaType);
-  skia::RefPtr<SkPixelRef> pixel_ref =
-      skia::AdoptRef(SkMallocPixelRef::NewAllocate(info, 0, 0));
-  pixel_ref->setImmutable();
-  UIResourceBitmap bitmap(pixel_ref, size);
-  UIResourceId ui_resource_id = 1;
-  host_impl_->CreateUIResource(ui_resource_id, bitmap);
-  EXPECT_EQ(1u, context3d->NumTextures());
-  ResourceProvider::ResourceId id1 =
-      host_impl_->ResourceIdForUIResource(ui_resource_id);
-  EXPECT_NE(0u, id1);
-}
-
-void ShutdownReleasesContext_Callback(scoped_ptr<CopyOutputResult> result) {
-}
-
-TEST_F(LayerTreeHostImplTest, ShutdownReleasesContext) {
-  scoped_refptr<TestContextProvider> context_provider =
-      TestContextProvider::Create();
-
-  CreateHostImpl(DefaultSettings(),
-                 FakeOutputSurface::Create3d(context_provider));
-
-  SetupRootLayerImpl(LayerImpl::Create(host_impl_->active_tree(), 1));
-
-  ScopedPtrVector<CopyOutputRequest> requests;
-  requests.push_back(CopyOutputRequest::CreateRequest(
-      base::Bind(&ShutdownReleasesContext_Callback)));
-
-  host_impl_->active_tree()->root_layer()->PassCopyRequests(&requests);
-
-  LayerTreeHostImpl::FrameData frame;
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-
-  // The CopyOutputResult's callback has a ref on the ContextProvider and a
-  // texture in a texture mailbox.
-  EXPECT_FALSE(context_provider->HasOneRef());
-  EXPECT_EQ(1u, context_provider->TestContext3d()->NumTextures());
-
-  host_impl_ = nullptr;
-
-  // The CopyOutputResult's callback was cancelled, the CopyOutputResult
-  // released, and the texture deleted.
-  EXPECT_TRUE(context_provider->HasOneRef());
-  EXPECT_EQ(0u, context_provider->TestContext3d()->NumTextures());
-}
-
-TEST_F(LayerTreeHostImplTest, TouchFlingShouldNotBubble) {
-  // When flinging via touch, only the child should scroll (we should not
-  // bubble).
-  gfx::Size surface_size(10, 10);
-  gfx::Size content_size(20, 20);
-  scoped_ptr<LayerImpl> root_clip =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  root_clip->SetHasRenderSurface(true);
-
-  scoped_ptr<LayerImpl> root =
-      CreateScrollableLayer(1, content_size, root_clip.get());
-  root->SetIsContainerForFixedPositionLayers(true);
-  scoped_ptr<LayerImpl> child =
-      CreateScrollableLayer(2, content_size, root_clip.get());
-
-  root->AddChild(child.Pass());
-  int root_id = root->id();
-  root_clip->AddChild(root.Pass());
-
-  host_impl_->SetViewportSize(surface_size);
-  host_impl_->active_tree()->SetRootLayer(root_clip.Pass());
-  host_impl_->active_tree()->SetViewportLayersFromIds(Layer::INVALID_ID, 3, 1,
-                                                      Layer::INVALID_ID);
-  host_impl_->active_tree()->DidBecomeActive();
-  DrawFrame();
-  {
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-
-    EXPECT_EQ(InputHandler::SCROLL_STARTED, host_impl_->FlingScrollBegin());
-
-    gfx::Vector2d scroll_delta(0, 100);
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-
-    host_impl_->ScrollEnd();
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-
-    // Only the child should have scrolled.
-    ASSERT_EQ(1u, scroll_info->scrolls.size());
-    ExpectNone(*scroll_info.get(), root_id);
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, TouchFlingShouldLockToFirstScrolledLayer) {
-  // Scroll a child layer beyond its maximum scroll range and make sure the
-  // the scroll doesn't bubble up to the parent layer.
-  gfx::Size surface_size(10, 10);
-  scoped_ptr<LayerImpl> root = LayerImpl::Create(host_impl_->active_tree(), 1);
-  root->SetHasRenderSurface(true);
-  scoped_ptr<LayerImpl> root_scrolling =
-      CreateScrollableLayer(2, surface_size, root.get());
-
-  scoped_ptr<LayerImpl> grand_child =
-      CreateScrollableLayer(4, surface_size, root.get());
-  grand_child->PushScrollOffsetFromMainThread(gfx::ScrollOffset(0, 2));
-
-  scoped_ptr<LayerImpl> child =
-      CreateScrollableLayer(3, surface_size, root.get());
-  child->PushScrollOffsetFromMainThread(gfx::ScrollOffset(0, 4));
-  child->AddChild(grand_child.Pass());
-
-  root_scrolling->AddChild(child.Pass());
-  root->AddChild(root_scrolling.Pass());
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-  host_impl_->active_tree()->DidBecomeActive();
-  host_impl_->SetViewportSize(surface_size);
-  DrawFrame();
-  {
-    scoped_ptr<ScrollAndScaleSet> scroll_info;
-    LayerImpl* child =
-        host_impl_->active_tree()->root_layer()->children()[0]->children()[0];
-    LayerImpl* grand_child = child->children()[0];
-
-    gfx::Vector2d scroll_delta(0, -2);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-    EXPECT_TRUE(host_impl_->ScrollBy(gfx::Point(), scroll_delta).did_scroll);
-
-    // The grand child should have scrolled up to its limit.
-    scroll_info = host_impl_->ProcessScrollDeltas();
-    ASSERT_EQ(1u, scroll_info->scrolls.size());
-    ExpectContains(*scroll_info, grand_child->id(), scroll_delta);
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), grand_child);
-
-    // The child should have received the bubbled delta, but the locked
-    // scrolling layer should remain set as the grand child.
-    EXPECT_TRUE(host_impl_->ScrollBy(gfx::Point(), scroll_delta).did_scroll);
-    scroll_info = host_impl_->ProcessScrollDeltas();
-    ASSERT_EQ(2u, scroll_info->scrolls.size());
-    ExpectContains(*scroll_info, grand_child->id(), scroll_delta);
-    ExpectContains(*scroll_info, child->id(), scroll_delta);
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), grand_child);
-
-    // The first |ScrollBy| after the fling should re-lock the scrolling
-    // layer to the first layer that scrolled, which is the child.
-    EXPECT_EQ(InputHandler::SCROLL_STARTED, host_impl_->FlingScrollBegin());
-    EXPECT_TRUE(host_impl_->ScrollBy(gfx::Point(), scroll_delta).did_scroll);
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), child);
-
-    // The child should have scrolled up to its limit.
-    scroll_info = host_impl_->ProcessScrollDeltas();
-    ASSERT_EQ(2u, scroll_info->scrolls.size());
-    ExpectContains(*scroll_info, grand_child->id(), scroll_delta);
-    ExpectContains(*scroll_info, child->id(), scroll_delta + scroll_delta);
-
-    // As the locked layer is at it's limit, no further scrolling can occur.
-    EXPECT_FALSE(host_impl_->ScrollBy(gfx::Point(), scroll_delta).did_scroll);
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), child);
-    host_impl_->ScrollEnd();
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, WheelFlingShouldBubble) {
-  // When flinging via wheel, the root should eventually scroll (we should
-  // bubble).
-  gfx::Size surface_size(10, 10);
-  gfx::Size content_size(20, 20);
-  scoped_ptr<LayerImpl> root_clip =
-      LayerImpl::Create(host_impl_->active_tree(), 3);
-  root_clip->SetHasRenderSurface(true);
-  scoped_ptr<LayerImpl> root_scroll =
-      CreateScrollableLayer(1, content_size, root_clip.get());
-  int root_scroll_id = root_scroll->id();
-  scoped_ptr<LayerImpl> child =
-      CreateScrollableLayer(2, content_size, root_clip.get());
-
-  root_scroll->AddChild(child.Pass());
-  root_clip->AddChild(root_scroll.Pass());
-
-  host_impl_->SetViewportSize(surface_size);
-  host_impl_->active_tree()->SetRootLayer(root_clip.Pass());
-  host_impl_->active_tree()->DidBecomeActive();
-  DrawFrame();
-  {
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-
-    EXPECT_EQ(InputHandler::SCROLL_STARTED, host_impl_->FlingScrollBegin());
-
-    gfx::Vector2d scroll_delta(0, 100);
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-
-    host_impl_->ScrollEnd();
-
-    scoped_ptr<ScrollAndScaleSet> scroll_info =
-        host_impl_->ProcessScrollDeltas();
-
-    // The root should have scrolled.
-    ASSERT_EQ(2u, scroll_info->scrolls.size());
-    ExpectContains(*scroll_info.get(), root_scroll_id, gfx::Vector2d(0, 10));
-  }
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollUnknownNotOnAncestorChain) {
-  // If we ray cast a scroller that is not on the first layer's ancestor chain,
-  // we should return SCROLL_UNKNOWN.
-  gfx::Size content_size(100, 100);
-  SetupScrollAndContentsLayers(content_size);
-
-  int scroll_layer_id = 2;
-  LayerImpl* scroll_layer =
-      host_impl_->active_tree()->LayerById(scroll_layer_id);
-  scroll_layer->SetDrawsContent(true);
-
-  int page_scale_layer_id = 5;
-  LayerImpl* page_scale_layer =
-      host_impl_->active_tree()->LayerById(page_scale_layer_id);
-
-  int occluder_layer_id = 6;
-  scoped_ptr<LayerImpl> occluder_layer =
-      LayerImpl::Create(host_impl_->active_tree(), occluder_layer_id);
-  occluder_layer->SetDrawsContent(true);
-  occluder_layer->SetBounds(content_size);
-  occluder_layer->SetContentBounds(content_size);
-  occluder_layer->SetPosition(gfx::PointF());
-
-  // The parent of the occluder is *above* the scroller.
-  page_scale_layer->AddChild(occluder_layer.Pass());
-
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_UNKNOWN,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollUnknownScrollAncestorMismatch) {
-  // If we ray cast a scroller this is on the first layer's ancestor chain, but
-  // is not the first scroller we encounter when walking up from the layer, we
-  // should also return SCROLL_UNKNOWN.
-  gfx::Size content_size(100, 100);
-  SetupScrollAndContentsLayers(content_size);
-
-  int scroll_layer_id = 2;
-  LayerImpl* scroll_layer =
-      host_impl_->active_tree()->LayerById(scroll_layer_id);
-  scroll_layer->SetDrawsContent(true);
-
-  int occluder_layer_id = 6;
-  scoped_ptr<LayerImpl> occluder_layer =
-      LayerImpl::Create(host_impl_->active_tree(), occluder_layer_id);
-  occluder_layer->SetDrawsContent(true);
-  occluder_layer->SetBounds(content_size);
-  occluder_layer->SetContentBounds(content_size);
-  occluder_layer->SetPosition(gfx::PointF(-10.f, -10.f));
-
-  int child_scroll_clip_layer_id = 7;
-  scoped_ptr<LayerImpl> child_scroll_clip =
-      LayerImpl::Create(host_impl_->active_tree(), child_scroll_clip_layer_id);
-
-  int child_scroll_layer_id = 8;
-  scoped_ptr<LayerImpl> child_scroll = CreateScrollableLayer(
-      child_scroll_layer_id, content_size, child_scroll_clip.get());
-
-  child_scroll->SetPosition(gfx::PointF(10.f, 10.f));
-
-  child_scroll->AddChild(occluder_layer.Pass());
-  scroll_layer->AddChild(child_scroll.Pass());
-
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_UNKNOWN,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-}
-
-TEST_F(LayerTreeHostImplTest, NotScrollInvisibleScroller) {
-  gfx::Size content_size(100, 100);
-  SetupScrollAndContentsLayers(content_size);
-
-  LayerImpl* root = host_impl_->active_tree()->LayerById(1);
-
-  int scroll_layer_id = 2;
-  LayerImpl* scroll_layer =
-      host_impl_->active_tree()->LayerById(scroll_layer_id);
-
-  int child_scroll_layer_id = 7;
-  scoped_ptr<LayerImpl> child_scroll =
-      CreateScrollableLayer(child_scroll_layer_id, content_size, root);
-  child_scroll->SetDrawsContent(false);
-
-  scroll_layer->AddChild(child_scroll.Pass());
-
-  DrawFrame();
-
-  // We should not have scrolled |child_scroll| even though we technically "hit"
-  // it. The reason for this is that if the scrolling the scroll would not move
-  // any layer that is a drawn RSLL member, then we can ignore the hit.
-  //
-  // Why SCROLL_STARTED? In this case, it's because we've bubbled out and
-  // started scrolling the inner viewport.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-
-  EXPECT_EQ(2, host_impl_->CurrentlyScrollingLayer()->id());
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollInvisibleScrollerWithVisibleDescendent) {
-  gfx::Size content_size(100, 100);
-  SetupScrollAndContentsLayers(content_size);
-
-  LayerImpl* root = host_impl_->active_tree()->LayerById(1);
-  LayerImpl* root_scroll_layer = host_impl_->active_tree()->LayerById(2);
-
-  scoped_ptr<LayerImpl> invisible_scroll_layer =
-      CreateScrollableLayer(7, content_size, root);
-  invisible_scroll_layer->SetDrawsContent(false);
-
-  scoped_ptr<LayerImpl> child_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 8);
-  child_layer->SetDrawsContent(false);
-
-  scoped_ptr<LayerImpl> grand_child_layer =
-      LayerImpl::Create(host_impl_->active_tree(), 9);
-  grand_child_layer->SetDrawsContent(true);
-  grand_child_layer->SetBounds(content_size);
-  grand_child_layer->SetContentBounds(content_size);
-  // Move the grand child so it's not hit by our test point.
-  grand_child_layer->SetPosition(gfx::PointF(10.f, 10.f));
-
-  child_layer->AddChild(grand_child_layer.Pass());
-  invisible_scroll_layer->AddChild(child_layer.Pass());
-  root_scroll_layer->AddChild(invisible_scroll_layer.Pass());
-
-  DrawFrame();
-
-  // We should have scrolled |invisible_scroll_layer| as it was hit and it has
-  // a descendant which is a drawn RSLL member.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-
-  EXPECT_EQ(7, host_impl_->CurrentlyScrollingLayer()->id());
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollInvisibleScrollerWithVisibleScrollChild) {
-  // This test case is very similar to the one above with one key difference:
-  // the invisible scroller has a scroll child that is indeed draw contents.
-  // If we attempt to initiate a gesture scroll off of the visible scroll child
-  // we should still start the scroll child.
-  gfx::Size content_size(100, 100);
-  SetupScrollAndContentsLayers(content_size);
-
-  LayerImpl* root = host_impl_->active_tree()->LayerById(1);
-
-  int scroll_layer_id = 2;
-  LayerImpl* scroll_layer =
-      host_impl_->active_tree()->LayerById(scroll_layer_id);
-
-  int scroll_child_id = 6;
-  scoped_ptr<LayerImpl> scroll_child =
-      LayerImpl::Create(host_impl_->active_tree(), scroll_child_id);
-  scroll_child->SetDrawsContent(true);
-  scroll_child->SetBounds(content_size);
-  scroll_child->SetContentBounds(content_size);
-  // Move the scroll child so it's not hit by our test point.
-  scroll_child->SetPosition(gfx::PointF(10.f, 10.f));
-
-  int invisible_scroll_layer_id = 7;
-  scoped_ptr<LayerImpl> invisible_scroll =
-      CreateScrollableLayer(invisible_scroll_layer_id, content_size, root);
-  invisible_scroll->SetDrawsContent(false);
-
-  int container_id = 8;
-  scoped_ptr<LayerImpl> container =
-      LayerImpl::Create(host_impl_->active_tree(), container_id);
-
-  scoped_ptr<std::set<LayerImpl*>> scroll_children(new std::set<LayerImpl*>);
-  scroll_children->insert(scroll_child.get());
-  invisible_scroll->SetScrollChildren(scroll_children.release());
-
-  scroll_child->SetScrollParent(invisible_scroll.get());
-
-  container->AddChild(invisible_scroll.Pass());
-  container->AddChild(scroll_child.Pass());
-
-  scroll_layer->AddChild(container.Pass());
-
-  DrawFrame();
-
-  // We should have scrolled |child_scroll| even though it is invisible.
-  // The reason for this is that if the scrolling the scroll would move a layer
-  // that is a drawn RSLL member, then we should accept this hit.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-
-  EXPECT_EQ(7, host_impl_->CurrentlyScrollingLayer()->id());
-}
-
-// Make sure LatencyInfo carried by LatencyInfoSwapPromise are passed
-// to CompositorFrameMetadata after SwapBuffers();
-TEST_F(LayerTreeHostImplTest, LatencyInfoPassedToCompositorFrameMetadata) {
-  scoped_ptr<SolidColorLayerImpl> root =
-      SolidColorLayerImpl::Create(host_impl_->active_tree(), 1);
-  root->SetPosition(gfx::PointF());
-  root->SetBounds(gfx::Size(10, 10));
-  root->SetContentBounds(gfx::Size(10, 10));
-  root->SetDrawsContent(true);
-  root->SetHasRenderSurface(true);
-
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-
-  FakeOutputSurface* fake_output_surface =
-      static_cast<FakeOutputSurface*>(host_impl_->output_surface());
-
-  const std::vector<ui::LatencyInfo>& metadata_latency_before =
-      fake_output_surface->last_sent_frame().metadata.latency_info;
-  EXPECT_TRUE(metadata_latency_before.empty());
-
-  ui::LatencyInfo latency_info;
-  latency_info.AddLatencyNumber(
-      ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT, 0, 0);
-  scoped_ptr<SwapPromise> swap_promise(
-      new LatencyInfoSwapPromise(latency_info));
-  host_impl_->active_tree()->QueueSwapPromise(swap_promise.Pass());
-  host_impl_->SetNeedsRedraw();
-
-  gfx::Rect full_frame_damage(host_impl_->DrawViewportSize());
-  LayerTreeHostImpl::FrameData frame;
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-  EXPECT_TRUE(host_impl_->SwapBuffers(frame));
-
-  const std::vector<ui::LatencyInfo>& metadata_latency_after =
-      fake_output_surface->last_sent_frame().metadata.latency_info;
-  EXPECT_EQ(1u, metadata_latency_after.size());
-  EXPECT_TRUE(metadata_latency_after[0].FindLatency(
-      ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT, 0, NULL));
-}
-
-TEST_F(LayerTreeHostImplTest, SelectionBoundsPassedToCompositorFrameMetadata) {
-  int root_layer_id = 1;
-  scoped_ptr<SolidColorLayerImpl> root =
-      SolidColorLayerImpl::Create(host_impl_->active_tree(), root_layer_id);
-  root->SetPosition(gfx::PointF());
-  root->SetBounds(gfx::Size(10, 10));
-  root->SetContentBounds(gfx::Size(10, 10));
-  root->SetDrawsContent(true);
-  root->SetHasRenderSurface(true);
-
-  host_impl_->active_tree()->SetRootLayer(root.Pass());
-
-  // Ensure the default frame selection bounds are empty.
-  FakeOutputSurface* fake_output_surface =
-      static_cast<FakeOutputSurface*>(host_impl_->output_surface());
-  const ViewportSelectionBound& selection_start_before =
-      fake_output_surface->last_sent_frame().metadata.selection_start;
-  const ViewportSelectionBound& selection_end_before =
-      fake_output_surface->last_sent_frame().metadata.selection_end;
-  EXPECT_EQ(ViewportSelectionBound(), selection_start_before);
-  EXPECT_EQ(ViewportSelectionBound(), selection_end_before);
-
-  // Plumb the layer-local selection bounds.
-  gfx::PointF selection_top(5, 0);
-  gfx::PointF selection_bottom(5, 5);
-  LayerSelectionBound start, end;
-  start.type = SELECTION_BOUND_CENTER;
-  start.layer_id = root_layer_id;
-  start.edge_bottom = selection_bottom;
-  start.edge_top = selection_top;
-  end = start;
-  host_impl_->active_tree()->RegisterSelection(start, end);
-
-  // Trigger a draw-swap sequence.
-  host_impl_->SetNeedsRedraw();
-
-  gfx::Rect full_frame_damage(host_impl_->DrawViewportSize());
-  LayerTreeHostImpl::FrameData frame;
-  EXPECT_EQ(DRAW_SUCCESS, host_impl_->PrepareToDraw(&frame));
-  host_impl_->DrawLayers(&frame, gfx::FrameTime::Now());
-  host_impl_->DidDrawAllLayers(frame);
-  EXPECT_TRUE(host_impl_->SwapBuffers(frame));
-
-  // Ensure the selection bounds have propagated to the frame metadata.
-  const ViewportSelectionBound& selection_start_after =
-      fake_output_surface->last_sent_frame().metadata.selection_start;
-  const ViewportSelectionBound& selection_end_after =
-      fake_output_surface->last_sent_frame().metadata.selection_end;
-  EXPECT_EQ(start.type, selection_start_after.type);
-  EXPECT_EQ(end.type, selection_end_after.type);
-  EXPECT_EQ(selection_bottom, selection_start_after.edge_bottom);
-  EXPECT_EQ(selection_top, selection_start_after.edge_top);
-  EXPECT_TRUE(selection_start_after.visible);
-  EXPECT_TRUE(selection_start_after.visible);
-}
-
-class SimpleSwapPromiseMonitor : public SwapPromiseMonitor {
- public:
-  SimpleSwapPromiseMonitor(LayerTreeHost* layer_tree_host,
-                           LayerTreeHostImpl* layer_tree_host_impl,
-                           int* set_needs_commit_count,
-                           int* set_needs_redraw_count,
-                           int* forward_to_main_count)
-      : SwapPromiseMonitor(layer_tree_host, layer_tree_host_impl),
-        set_needs_commit_count_(set_needs_commit_count),
-        set_needs_redraw_count_(set_needs_redraw_count),
-        forward_to_main_count_(forward_to_main_count) {}
-
-  ~SimpleSwapPromiseMonitor() override {}
-
-  void OnSetNeedsCommitOnMain() override { (*set_needs_commit_count_)++; }
-
-  void OnSetNeedsRedrawOnImpl() override { (*set_needs_redraw_count_)++; }
-
-  void OnForwardScrollUpdateToMainThreadOnImpl() override {
-    (*forward_to_main_count_)++;
-  }
-
- private:
-  int* set_needs_commit_count_;
-  int* set_needs_redraw_count_;
-  int* forward_to_main_count_;
-};
-
-TEST_F(LayerTreeHostImplTest, SimpleSwapPromiseMonitor) {
-  int set_needs_commit_count = 0;
-  int set_needs_redraw_count = 0;
-  int forward_to_main_count = 0;
-
-  {
-    scoped_ptr<SimpleSwapPromiseMonitor> swap_promise_monitor(
-        new SimpleSwapPromiseMonitor(NULL,
-                                     host_impl_.get(),
-                                     &set_needs_commit_count,
-                                     &set_needs_redraw_count,
-                                     &forward_to_main_count));
-    host_impl_->SetNeedsRedraw();
-    EXPECT_EQ(0, set_needs_commit_count);
-    EXPECT_EQ(1, set_needs_redraw_count);
-    EXPECT_EQ(0, forward_to_main_count);
-  }
-
-  // Now the monitor is destroyed, SetNeedsRedraw() is no longer being
-  // monitored.
-  host_impl_->SetNeedsRedraw();
-  EXPECT_EQ(0, set_needs_commit_count);
-  EXPECT_EQ(1, set_needs_redraw_count);
-  EXPECT_EQ(0, forward_to_main_count);
-
-  {
-    scoped_ptr<SimpleSwapPromiseMonitor> swap_promise_monitor(
-        new SimpleSwapPromiseMonitor(NULL,
-                                     host_impl_.get(),
-                                     &set_needs_commit_count,
-                                     &set_needs_redraw_count,
-                                     &forward_to_main_count));
-    host_impl_->SetNeedsRedrawRect(gfx::Rect(10, 10));
-    EXPECT_EQ(0, set_needs_commit_count);
-    EXPECT_EQ(2, set_needs_redraw_count);
-    EXPECT_EQ(0, forward_to_main_count);
-  }
-
-  {
-    scoped_ptr<SimpleSwapPromiseMonitor> swap_promise_monitor(
-        new SimpleSwapPromiseMonitor(NULL,
-                                     host_impl_.get(),
-                                     &set_needs_commit_count,
-                                     &set_needs_redraw_count,
-                                     &forward_to_main_count));
-    // Empty damage rect won't signal the monitor.
-    host_impl_->SetNeedsRedrawRect(gfx::Rect());
-    EXPECT_EQ(0, set_needs_commit_count);
-    EXPECT_EQ(2, set_needs_redraw_count);
-    EXPECT_EQ(0, forward_to_main_count);
-  }
-
-  {
-    set_needs_commit_count = 0;
-    set_needs_redraw_count = 0;
-    forward_to_main_count = 0;
-    scoped_ptr<SimpleSwapPromiseMonitor> swap_promise_monitor(
-        new SimpleSwapPromiseMonitor(NULL,
-                                     host_impl_.get(),
-                                     &set_needs_commit_count,
-                                     &set_needs_redraw_count,
-                                     &forward_to_main_count));
-    LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(100, 100));
-
-    // Scrolling normally should not trigger any forwarding.
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-    EXPECT_TRUE(
-        host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10)).did_scroll);
-    host_impl_->ScrollEnd();
-
-    EXPECT_EQ(0, set_needs_commit_count);
-    EXPECT_EQ(1, set_needs_redraw_count);
-    EXPECT_EQ(0, forward_to_main_count);
-
-    // Scrolling with a scroll handler should defer the swap to the main
-    // thread.
-    scroll_layer->SetHaveScrollEventHandlers(true);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-    EXPECT_TRUE(
-        host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, 10)).did_scroll);
-    host_impl_->ScrollEnd();
-
-    EXPECT_EQ(0, set_needs_commit_count);
-    EXPECT_EQ(2, set_needs_redraw_count);
-    EXPECT_EQ(1, forward_to_main_count);
-  }
-}
-
-class LayerTreeHostImplWithTopControlsTest : public LayerTreeHostImplTest {
- public:
-  void SetUp() override {
-    LayerTreeSettings settings = DefaultSettings();
-    CreateHostImpl(settings, CreateOutputSurface());
-    host_impl_->active_tree()->set_top_controls_height(top_controls_height_);
-    host_impl_->sync_tree()->set_top_controls_height(top_controls_height_);
-    host_impl_->active_tree()->SetCurrentTopControlsShownRatio(1.f);
-  }
-
- protected:
-  static const int top_controls_height_;
-};
-
-const int LayerTreeHostImplWithTopControlsTest::top_controls_height_ = 50;
-
-TEST_F(LayerTreeHostImplWithTopControlsTest, NoIdleAnimations) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100))
-      ->PushScrollOffsetFromMainThread(gfx::ScrollOffset(0, 10));
-  host_impl_->Animate(base::TimeTicks());
-  EXPECT_FALSE(did_request_redraw_);
-}
-
-TEST_F(LayerTreeHostImplWithTopControlsTest, TopControlsHeightIsCommitted) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  EXPECT_FALSE(did_request_redraw_);
-  host_impl_->CreatePendingTree();
-  host_impl_->sync_tree()->set_top_controls_height(100);
-  host_impl_->ActivateSyncTree();
-  EXPECT_EQ(100, host_impl_->top_controls_manager()->TopControlsHeight());
-}
-
-TEST_F(LayerTreeHostImplWithTopControlsTest,
-       TopControlsStayFullyVisibleOnHeightChange) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  EXPECT_EQ(0.f, host_impl_->top_controls_manager()->ControlsTopOffset());
-
-  host_impl_->CreatePendingTree();
-  host_impl_->sync_tree()->set_top_controls_height(0);
-  host_impl_->ActivateSyncTree();
-  EXPECT_EQ(0.f, host_impl_->top_controls_manager()->ControlsTopOffset());
-
-  host_impl_->CreatePendingTree();
-  host_impl_->sync_tree()->set_top_controls_height(50);
-  host_impl_->ActivateSyncTree();
-  EXPECT_EQ(0.f, host_impl_->top_controls_manager()->ControlsTopOffset());
-}
-
-TEST_F(LayerTreeHostImplWithTopControlsTest, TopControlsAnimationScheduling) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 100))
-      ->PushScrollOffsetFromMainThread(gfx::ScrollOffset(0, 10));
-  host_impl_->DidChangeTopControlsPosition();
-  EXPECT_TRUE(did_request_animate_);
-  EXPECT_TRUE(did_request_redraw_);
-}
-
-TEST_F(LayerTreeHostImplWithTopControlsTest, ScrollHandledByTopControls) {
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(100, 200));
-  host_impl_->SetViewportSize(gfx::Size(100, 100));
-  host_impl_->top_controls_manager()->UpdateTopControlsState(
-      BOTH, SHOWN, false);
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  EXPECT_EQ(0, host_impl_->top_controls_manager()->ControlsTopOffset());
-  EXPECT_EQ(gfx::Vector2dF().ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  // Scroll just the top controls and verify that the scroll succeeds.
-  const float residue = 10;
-  float offset = top_controls_height_ - residue;
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, offset)).did_scroll);
-  EXPECT_FLOAT_EQ(-offset,
-                  host_impl_->top_controls_manager()->ControlsTopOffset());
-  EXPECT_EQ(gfx::Vector2dF().ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  // Scroll across the boundary
-  const float content_scroll = 20;
-  offset = residue + content_scroll;
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, offset)).did_scroll);
-  EXPECT_EQ(-top_controls_height_,
-            host_impl_->top_controls_manager()->ControlsTopOffset());
-  EXPECT_EQ(gfx::Vector2dF(0, content_scroll).ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  // Now scroll back to the top of the content
-  offset = -content_scroll;
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, offset)).did_scroll);
-  EXPECT_EQ(-top_controls_height_,
-            host_impl_->top_controls_manager()->ControlsTopOffset());
-  EXPECT_EQ(gfx::Vector2dF().ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  // And scroll the top controls completely into view
-  offset = -top_controls_height_;
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, offset)).did_scroll);
-  EXPECT_EQ(0, host_impl_->top_controls_manager()->ControlsTopOffset());
-  EXPECT_EQ(gfx::Vector2dF().ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  // And attempt to scroll past the end
-  EXPECT_FALSE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, offset)).did_scroll);
-  EXPECT_EQ(0, host_impl_->top_controls_manager()->ControlsTopOffset());
-  EXPECT_EQ(gfx::Vector2dF().ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  host_impl_->ScrollEnd();
-}
-
-TEST_F(LayerTreeHostImplWithTopControlsTest, TopControlsAnimationAtOrigin) {
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(100, 200));
-  host_impl_->SetViewportSize(gfx::Size(100, 200));
-  host_impl_->top_controls_manager()->UpdateTopControlsState(
-      BOTH, SHOWN, false);
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  EXPECT_EQ(0, host_impl_->top_controls_manager()->ControlsTopOffset());
-  EXPECT_EQ(gfx::Vector2dF().ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  // Scroll the top controls partially.
-  const float residue = 35;
-  float offset = top_controls_height_ - residue;
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, offset)).did_scroll);
-  EXPECT_FLOAT_EQ(-offset,
-                  host_impl_->top_controls_manager()->ControlsTopOffset());
-  EXPECT_EQ(gfx::Vector2dF().ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  did_request_redraw_ = false;
-  did_request_animate_ = false;
-  did_request_commit_ = false;
-
-  // End the scroll while the controls are still offset from their limit.
-  host_impl_->ScrollEnd();
-  ASSERT_TRUE(host_impl_->top_controls_manager()->animation());
-  EXPECT_TRUE(did_request_animate_);
-  EXPECT_TRUE(did_request_redraw_);
-  EXPECT_FALSE(did_request_commit_);
-
-  // The top controls should properly animate until finished, despite the scroll
-  // offset being at the origin.
-  base::TimeTicks animation_time = gfx::FrameTime::Now();
-  while (did_request_animate_) {
-    did_request_redraw_ = false;
-    did_request_animate_ = false;
-    did_request_commit_ = false;
-
-    float old_offset =
-        host_impl_->top_controls_manager()->ControlsTopOffset();
-
-    animation_time += base::TimeDelta::FromMilliseconds(5);
-    host_impl_->Animate(animation_time);
-    EXPECT_EQ(gfx::Vector2dF().ToString(),
-              scroll_layer->CurrentScrollOffset().ToString());
-
-    float new_offset =
-        host_impl_->top_controls_manager()->ControlsTopOffset();
-
-    // No commit is needed as the controls are animating the content offset,
-    // not the scroll offset.
-    EXPECT_FALSE(did_request_commit_);
-
-    if (new_offset != old_offset)
-      EXPECT_TRUE(did_request_redraw_);
-
-    if (new_offset != 0) {
-      EXPECT_TRUE(host_impl_->top_controls_manager()->animation());
-      EXPECT_TRUE(did_request_animate_);
-    }
-  }
-  EXPECT_FALSE(host_impl_->top_controls_manager()->animation());
-}
-
-TEST_F(LayerTreeHostImplWithTopControlsTest, TopControlsAnimationAfterScroll) {
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(100, 200));
-  host_impl_->SetViewportSize(gfx::Size(100, 100));
-  host_impl_->top_controls_manager()->UpdateTopControlsState(
-      BOTH, SHOWN, false);
-  float initial_scroll_offset = 50;
-  scroll_layer->PushScrollOffsetFromMainThread(
-      gfx::ScrollOffset(0, initial_scroll_offset));
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  EXPECT_EQ(0, host_impl_->top_controls_manager()->ControlsTopOffset());
-  EXPECT_EQ(gfx::Vector2dF(0, initial_scroll_offset).ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  // Scroll the top controls partially.
-  const float residue = 15;
-  float offset = top_controls_height_ - residue;
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, offset)).did_scroll);
-  EXPECT_FLOAT_EQ(-offset,
-                  host_impl_->top_controls_manager()->ControlsTopOffset());
-  EXPECT_EQ(gfx::Vector2dF(0, initial_scroll_offset).ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  did_request_redraw_ = false;
-  did_request_animate_ = false;
-  did_request_commit_ = false;
-
-  // End the scroll while the controls are still offset from the limit.
-  host_impl_->ScrollEnd();
-  ASSERT_TRUE(host_impl_->top_controls_manager()->animation());
-  EXPECT_TRUE(did_request_animate_);
-  EXPECT_TRUE(did_request_redraw_);
-  EXPECT_FALSE(did_request_commit_);
-
-  // Animate the top controls to the limit.
-  base::TimeTicks animation_time = gfx::FrameTime::Now();
-  while (did_request_animate_) {
-    did_request_redraw_ = false;
-    did_request_animate_ = false;
-    did_request_commit_ = false;
-
-    float old_offset =
-        host_impl_->top_controls_manager()->ControlsTopOffset();
-
-    animation_time += base::TimeDelta::FromMilliseconds(5);
-    host_impl_->Animate(animation_time);
-
-    float new_offset =
-        host_impl_->top_controls_manager()->ControlsTopOffset();
-
-    if (new_offset != old_offset) {
-      EXPECT_TRUE(did_request_redraw_);
-      EXPECT_TRUE(did_request_commit_);
-    }
-  }
-  EXPECT_FALSE(host_impl_->top_controls_manager()->animation());
-  EXPECT_EQ(-top_controls_height_,
-            host_impl_->top_controls_manager()->ControlsTopOffset());
-}
-
-TEST_F(LayerTreeHostImplWithTopControlsTest,
-       TopControlsAnimationAfterMainThreadFlingStopped) {
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(100, 200));
-  host_impl_->SetViewportSize(gfx::Size(100, 100));
-  host_impl_->top_controls_manager()->UpdateTopControlsState(BOTH, SHOWN,
-                                                             false);
-  float initial_scroll_offset = 50;
-  scroll_layer->PushScrollOffsetFromMainThread(
-      gfx::ScrollOffset(0, initial_scroll_offset));
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  EXPECT_EQ(0, host_impl_->top_controls_manager()->ControlsTopOffset());
-  EXPECT_EQ(gfx::Vector2dF(0, initial_scroll_offset).ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  // Scroll the top controls partially.
-  const float residue = 15;
-  float offset = top_controls_height_ - residue;
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, offset)).did_scroll);
-  EXPECT_FLOAT_EQ(-offset,
-                  host_impl_->top_controls_manager()->ControlsTopOffset());
-  EXPECT_EQ(gfx::Vector2dF(0, initial_scroll_offset).ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  did_request_redraw_ = false;
-  did_request_animate_ = false;
-  did_request_commit_ = false;
-
-  // End the fling while the controls are still offset from the limit.
-  host_impl_->MainThreadHasStoppedFlinging();
-  ASSERT_TRUE(host_impl_->top_controls_manager()->animation());
-  EXPECT_TRUE(did_request_animate_);
-  EXPECT_TRUE(did_request_redraw_);
-  EXPECT_FALSE(did_request_commit_);
-
-  // Animate the top controls to the limit.
-  base::TimeTicks animation_time = gfx::FrameTime::Now();
-  while (did_request_animate_) {
-    did_request_redraw_ = false;
-    did_request_animate_ = false;
-    did_request_commit_ = false;
-
-    float old_offset = host_impl_->top_controls_manager()->ControlsTopOffset();
-
-    animation_time += base::TimeDelta::FromMilliseconds(5);
-    host_impl_->Animate(animation_time);
-
-    float new_offset = host_impl_->top_controls_manager()->ControlsTopOffset();
-
-    if (new_offset != old_offset) {
-      EXPECT_TRUE(did_request_redraw_);
-      EXPECT_TRUE(did_request_commit_);
-    }
-  }
-  EXPECT_FALSE(host_impl_->top_controls_manager()->animation());
-  EXPECT_EQ(-top_controls_height_,
-            host_impl_->top_controls_manager()->ControlsTopOffset());
-}
-
-TEST_F(LayerTreeHostImplWithTopControlsTest,
-       TopControlsScrollDeltaInOverScroll) {
-  // test varifies that the overscroll delta should not have accumulated in
-  // the top controls if we do a hide and show without releasing finger.
-
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(100, 200));
-  host_impl_->SetViewportSize(gfx::Size(100, 100));
-  host_impl_->top_controls_manager()->UpdateTopControlsState(BOTH, SHOWN,
-                                                             false);
-  DrawFrame();
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-  EXPECT_EQ(0, host_impl_->top_controls_manager()->ControlsTopOffset());
-
-  float offset = 50;
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, offset)).did_scroll);
-  EXPECT_EQ(-offset, host_impl_->top_controls_manager()->ControlsTopOffset());
-  EXPECT_EQ(gfx::Vector2dF().ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, offset)).did_scroll);
-  EXPECT_EQ(gfx::Vector2dF(0, offset).ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, offset)).did_scroll);
-
-  // Should have fully scrolled
-  EXPECT_EQ(gfx::Vector2dF(0, scroll_layer->MaxScrollOffset().y()).ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  float overscrollamount = 10;
-
-  // Overscroll the content
-  EXPECT_FALSE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, overscrollamount))
-          .did_scroll);
-  EXPECT_EQ(gfx::Vector2dF(0, 2 * offset).ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-  EXPECT_EQ(gfx::Vector2dF(0, overscrollamount).ToString(),
-            host_impl_->accumulated_root_overscroll().ToString());
-
-  EXPECT_TRUE(host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, -2 * offset))
-                  .did_scroll);
-  EXPECT_EQ(gfx::Vector2dF(0, 0).ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-  EXPECT_EQ(-offset, host_impl_->top_controls_manager()->ControlsTopOffset());
-
-  EXPECT_TRUE(
-      host_impl_->ScrollBy(gfx::Point(), gfx::Vector2d(0, -offset)).did_scroll);
-  EXPECT_EQ(gfx::Vector2dF(0, 0).ToString(),
-            scroll_layer->CurrentScrollOffset().ToString());
-
-  // Top controls should be fully visible
-  EXPECT_EQ(0, host_impl_->top_controls_manager()->ControlsTopOffset());
-
-  host_impl_->ScrollEnd();
-}
-
-class LayerTreeHostImplVirtualViewportTest : public LayerTreeHostImplTest {
- public:
-  void SetupVirtualViewportLayers(const gfx::Size& content_size,
-                                  const gfx::Size& outer_viewport,
-                                  const gfx::Size& inner_viewport) {
-    LayerTreeImpl* layer_tree_impl = host_impl_->active_tree();
-    const int kOuterViewportClipLayerId = 6;
-    const int kOuterViewportScrollLayerId = 7;
-    const int kInnerViewportScrollLayerId = 2;
-    const int kInnerViewportClipLayerId = 4;
-    const int kPageScaleLayerId = 5;
-
-    scoped_ptr<LayerImpl> inner_scroll =
-        LayerImpl::Create(layer_tree_impl, kInnerViewportScrollLayerId);
-    inner_scroll->SetIsContainerForFixedPositionLayers(true);
-    inner_scroll->PushScrollOffsetFromMainThread(gfx::ScrollOffset());
-
-    scoped_ptr<LayerImpl> inner_clip =
-        LayerImpl::Create(layer_tree_impl, kInnerViewportClipLayerId);
-    inner_clip->SetBounds(inner_viewport);
-
-    scoped_ptr<LayerImpl> page_scale =
-        LayerImpl::Create(layer_tree_impl, kPageScaleLayerId);
-
-    inner_scroll->SetScrollClipLayer(inner_clip->id());
-    inner_scroll->SetBounds(outer_viewport);
-    inner_scroll->SetContentBounds(outer_viewport);
-    inner_scroll->SetPosition(gfx::PointF());
-
-    scoped_ptr<LayerImpl> outer_clip =
-        LayerImpl::Create(layer_tree_impl, kOuterViewportClipLayerId);
-    outer_clip->SetBounds(outer_viewport);
-    outer_clip->SetIsContainerForFixedPositionLayers(true);
-
-    scoped_ptr<LayerImpl> outer_scroll =
-        LayerImpl::Create(layer_tree_impl, kOuterViewportScrollLayerId);
-    outer_scroll->SetScrollClipLayer(outer_clip->id());
-    outer_scroll->PushScrollOffsetFromMainThread(gfx::ScrollOffset());
-    outer_scroll->SetBounds(content_size);
-    outer_scroll->SetContentBounds(content_size);
-    outer_scroll->SetPosition(gfx::PointF());
-
-    scoped_ptr<LayerImpl> contents =
-        LayerImpl::Create(layer_tree_impl, 8);
-    contents->SetDrawsContent(true);
-    contents->SetBounds(content_size);
-    contents->SetContentBounds(content_size);
-    contents->SetPosition(gfx::PointF());
-
-    outer_scroll->AddChild(contents.Pass());
-    outer_clip->AddChild(outer_scroll.Pass());
-    inner_scroll->AddChild(outer_clip.Pass());
-    page_scale->AddChild(inner_scroll.Pass());
-    inner_clip->AddChild(page_scale.Pass());
-
-    inner_clip->SetHasRenderSurface(true);
-    layer_tree_impl->SetRootLayer(inner_clip.Pass());
-    layer_tree_impl->SetViewportLayersFromIds(
-        Layer::INVALID_ID, kPageScaleLayerId, kInnerViewportScrollLayerId,
-        kOuterViewportScrollLayerId);
-
-    host_impl_->active_tree()->DidBecomeActive();
-  }
-};
-
-TEST_F(LayerTreeHostImplVirtualViewportTest, FlingScrollBubblesToInner) {
-  gfx::Size content_size = gfx::Size(100, 160);
-  gfx::Size outer_viewport = gfx::Size(50, 80);
-  gfx::Size inner_viewport = gfx::Size(25, 40);
-
-  SetupVirtualViewportLayers(content_size, outer_viewport, inner_viewport);
-
-  LayerImpl* outer_scroll = host_impl_->OuterViewportScrollLayer();
-  LayerImpl* inner_scroll = host_impl_->InnerViewportScrollLayer();
-  DrawFrame();
-  {
-    gfx::Vector2dF inner_expected;
-    gfx::Vector2dF outer_expected;
-    EXPECT_VECTOR_EQ(inner_expected, inner_scroll->CurrentScrollOffset());
-    EXPECT_VECTOR_EQ(outer_expected, outer_scroll->CurrentScrollOffset());
-
-    // Make sure the fling goes to the outer viewport first
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-    EXPECT_EQ(InputHandler::SCROLL_STARTED, host_impl_->FlingScrollBegin());
-
-    gfx::Vector2d scroll_delta(inner_viewport.width(), inner_viewport.height());
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    outer_expected += gfx::Vector2dF(scroll_delta.x(), scroll_delta.y());
-
-    host_impl_->ScrollEnd();
-
-    EXPECT_VECTOR_EQ(inner_expected, inner_scroll->CurrentScrollOffset());
-    EXPECT_VECTOR_EQ(outer_expected, outer_scroll->CurrentScrollOffset());
-
-    // Fling past the outer viewport boundry, make sure inner viewport scrolls.
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-    EXPECT_EQ(InputHandler::SCROLL_STARTED, host_impl_->FlingScrollBegin());
-
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    outer_expected += gfx::Vector2dF(scroll_delta.x(), scroll_delta.y());
-
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    inner_expected += gfx::Vector2dF(scroll_delta.x(), scroll_delta.y());
-
-    host_impl_->ScrollEnd();
-
-    EXPECT_VECTOR_EQ(inner_expected, inner_scroll->CurrentScrollOffset());
-    EXPECT_VECTOR_EQ(outer_expected, outer_scroll->CurrentScrollOffset());
-  }
-}
-
-TEST_F(LayerTreeHostImplVirtualViewportTest,
-       DiagonalScrollBubblesPerfectlyToInner) {
-  gfx::Size content_size = gfx::Size(100, 160);
-  gfx::Size outer_viewport = gfx::Size(50, 80);
-  gfx::Size inner_viewport = gfx::Size(25, 40);
-
-  SetupVirtualViewportLayers(content_size, outer_viewport, inner_viewport);
-
-  LayerImpl* outer_scroll = host_impl_->OuterViewportScrollLayer();
-  LayerImpl* inner_scroll = host_impl_->InnerViewportScrollLayer();
-  DrawFrame();
-  {
-    gfx::Vector2dF inner_expected;
-    gfx::Vector2dF outer_expected;
-    EXPECT_VECTOR_EQ(inner_expected, inner_scroll->CurrentScrollOffset());
-    EXPECT_VECTOR_EQ(outer_expected, outer_scroll->CurrentScrollOffset());
-
-    // Make sure the scroll goes to the outer viewport first.
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-    EXPECT_EQ(InputHandler::SCROLL_STARTED, host_impl_->FlingScrollBegin());
-
-    // Scroll near the edge of the outer viewport.
-    gfx::Vector2d scroll_delta(inner_viewport.width(), inner_viewport.height());
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    outer_expected += scroll_delta;
-
-    EXPECT_VECTOR_EQ(inner_expected, inner_scroll->CurrentScrollOffset());
-    EXPECT_VECTOR_EQ(outer_expected, outer_scroll->CurrentScrollOffset());
-
-    // Now diagonal scroll across the outer viewport boundary in a single event.
-    // The entirety of the scroll should be consumed, as bubbling between inner
-    // and outer viewport layers is perfect.
-    host_impl_->ScrollBy(gfx::Point(), gfx::ScaleVector2d(scroll_delta, 2));
-    outer_expected += scroll_delta;
-    inner_expected += scroll_delta;
-    host_impl_->ScrollEnd();
-
-    EXPECT_VECTOR_EQ(inner_expected, inner_scroll->CurrentScrollOffset());
-    EXPECT_VECTOR_EQ(outer_expected, outer_scroll->CurrentScrollOffset());
-  }
-}
-
-TEST_F(LayerTreeHostImplVirtualViewportTest,
-       TouchFlingCanLockToViewportLayerAfterBubbling) {
-  gfx::Size content_size = gfx::Size(100, 160);
-  gfx::Size outer_viewport = gfx::Size(50, 80);
-  gfx::Size inner_viewport = gfx::Size(25, 40);
-
-  SetupVirtualViewportLayers(content_size, outer_viewport, inner_viewport);
-
-  LayerImpl* outer_scroll = host_impl_->OuterViewportScrollLayer();
-  LayerImpl* inner_scroll = host_impl_->InnerViewportScrollLayer();
-
-  scoped_ptr<LayerImpl> child =
-      CreateScrollableLayer(10, outer_viewport, outer_scroll);
-  LayerImpl* child_scroll = child.get();
-  outer_scroll->children()[0]->AddChild(child.Pass());
-
-  DrawFrame();
-  {
-    scoped_ptr<ScrollAndScaleSet> scroll_info;
-
-    gfx::Vector2d scroll_delta(0, inner_viewport.height());
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE));
-    EXPECT_TRUE(host_impl_->ScrollBy(gfx::Point(), scroll_delta).did_scroll);
-
-    // The child should have scrolled up to its limit.
-    scroll_info = host_impl_->ProcessScrollDeltas();
-    ASSERT_EQ(1u, scroll_info->scrolls.size());
-    ExpectContains(*scroll_info, child_scroll->id(), scroll_delta);
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), child_scroll);
-
-    // The first |ScrollBy| after the fling should re-lock the scrolling
-    // layer to the first layer that scrolled, the inner viewport scroll layer.
-    EXPECT_EQ(InputHandler::SCROLL_STARTED, host_impl_->FlingScrollBegin());
-    EXPECT_TRUE(host_impl_->ScrollBy(gfx::Point(), scroll_delta).did_scroll);
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), inner_scroll);
-
-    // The inner viewport should have scrolled up to its limit.
-    scroll_info = host_impl_->ProcessScrollDeltas();
-    ASSERT_EQ(2u, scroll_info->scrolls.size());
-    ExpectContains(*scroll_info, child_scroll->id(), scroll_delta);
-    ExpectContains(*scroll_info, inner_scroll->id(), scroll_delta);
-
-    // As the locked layer is at its limit, no further scrolling can occur.
-    EXPECT_FALSE(host_impl_->ScrollBy(gfx::Point(), scroll_delta).did_scroll);
-    EXPECT_EQ(host_impl_->CurrentlyScrollingLayer(), inner_scroll);
-    host_impl_->ScrollEnd();
-  }
-}
-
-class LayerTreeHostImplWithImplicitLimitsTest : public LayerTreeHostImplTest {
- public:
-  void SetUp() override {
-    LayerTreeSettings settings = DefaultSettings();
-    settings.max_memory_for_prepaint_percentage = 50;
-    CreateHostImpl(settings, CreateOutputSurface());
-  }
-};
-
-TEST_F(LayerTreeHostImplWithImplicitLimitsTest, ImplicitMemoryLimits) {
-  // Set up a memory policy and percentages which could cause
-  // 32-bit integer overflows.
-  ManagedMemoryPolicy mem_policy(300 * 1024 * 1024);  // 300MB
-
-  // Verify implicit limits are calculated correctly with no overflows
-  host_impl_->SetMemoryPolicy(mem_policy);
-  EXPECT_EQ(host_impl_->global_tile_state().hard_memory_limit_in_bytes,
-            300u * 1024u * 1024u);
-  EXPECT_EQ(host_impl_->global_tile_state().soft_memory_limit_in_bytes,
-            150u * 1024u * 1024u);
-}
-
-TEST_F(LayerTreeHostImplTest, ExternalTransformReflectedInNextDraw) {
-  const gfx::Size layer_size(100, 100);
-  gfx::Transform external_transform;
-  const gfx::Rect external_viewport(layer_size);
-  const gfx::Rect external_clip(layer_size);
-  const bool resourceless_software_draw = false;
-  LayerImpl* layer = SetupScrollAndContentsLayers(layer_size);
-
-  host_impl_->SetExternalDrawConstraints(external_transform,
-                                         external_viewport,
-                                         external_clip,
-                                         external_viewport,
-                                         external_transform,
-                                         resourceless_software_draw);
-  DrawFrame();
-  EXPECT_TRANSFORMATION_MATRIX_EQ(
-      external_transform, layer->draw_properties().target_space_transform);
-
-  external_transform.Translate(20, 20);
-  host_impl_->SetExternalDrawConstraints(external_transform,
-                                         external_viewport,
-                                         external_clip,
-                                         external_viewport,
-                                         external_transform,
-                                         resourceless_software_draw);
-  DrawFrame();
-  EXPECT_TRANSFORMATION_MATRIX_EQ(
-      external_transform, layer->draw_properties().target_space_transform);
-}
-
-TEST_F(LayerTreeHostImplTest, ScrollAnimated) {
-  SetupScrollAndContentsLayers(gfx::Size(100, 200));
-  DrawFrame();
-
-  base::TimeTicks start_time =
-      base::TimeTicks() + base::TimeDelta::FromMilliseconds(100);
-
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollAnimated(gfx::Point(), gfx::Vector2d(0, 50)));
-
-  LayerImpl* scrolling_layer = host_impl_->CurrentlyScrollingLayer();
-
-  host_impl_->Animate(start_time);
-  host_impl_->UpdateAnimationState(true);
-
-  EXPECT_EQ(gfx::ScrollOffset(), scrolling_layer->CurrentScrollOffset());
-
-  host_impl_->Animate(start_time + base::TimeDelta::FromMilliseconds(50));
-  host_impl_->UpdateAnimationState(true);
-
-  float y = scrolling_layer->CurrentScrollOffset().y();
-  EXPECT_TRUE(y > 1 && y < 49);
-
-  // Update target.
-  EXPECT_EQ(InputHandler::SCROLL_STARTED,
-            host_impl_->ScrollAnimated(gfx::Point(), gfx::Vector2d(0, 50)));
-
-  host_impl_->Animate(start_time + base::TimeDelta::FromMilliseconds(200));
-  host_impl_->UpdateAnimationState(true);
-
-  y = scrolling_layer->CurrentScrollOffset().y();
-  EXPECT_TRUE(y > 50 && y < 100);
-  EXPECT_EQ(scrolling_layer, host_impl_->CurrentlyScrollingLayer());
-
-  host_impl_->Animate(start_time + base::TimeDelta::FromMilliseconds(250));
-  host_impl_->UpdateAnimationState(true);
-
-  EXPECT_VECTOR_EQ(gfx::ScrollOffset(0, 100),
-                   scrolling_layer->CurrentScrollOffset());
-  EXPECT_EQ(NULL, host_impl_->CurrentlyScrollingLayer());
-}
-
-TEST_F(LayerTreeHostImplTest, GetPictureLayerImplPairs) {
-  host_impl_->CreatePendingTree();
-
-  scoped_ptr<PictureLayerImpl> layer =
-      FakePictureLayerImpl::Create(host_impl_->pending_tree(), 10);
-  layer->SetBounds(gfx::Size(10, 10));
-  scoped_ptr<FakePictureLayerImpl> nondraw_layer =
-      FakePictureLayerImpl::Create(host_impl_->pending_tree(), 12);
-  nondraw_layer->SetBounds(gfx::Size(10, 10));
-
-  scoped_refptr<RasterSource> pile(FakePicturePileImpl::CreateEmptyPile(
-      gfx::Size(10, 10), gfx::Size(10, 10)));
-  Region empty_invalidation;
-  const PictureLayerTilingSet* null_tiling_set = nullptr;
-  layer->set_gpu_raster_max_texture_size(host_impl_->device_viewport_size());
-  layer->UpdateRasterSource(pile, &empty_invalidation, null_tiling_set);
-  nondraw_layer->set_gpu_raster_max_texture_size(
-      host_impl_->device_viewport_size());
-  nondraw_layer->UpdateRasterSource(pile, &empty_invalidation, null_tiling_set);
-
-  layer->AddChild(nondraw_layer.Pass());
-  host_impl_->pending_tree()->SetRootLayer(layer.Pass());
-
-  LayerTreeImpl* pending_tree = host_impl_->pending_tree();
-  LayerImpl* pending_layer = pending_tree->root_layer();
-  FakePictureLayerImpl* pending_nondraw_layer =
-      static_cast<FakePictureLayerImpl*>(pending_layer->children()[0]);
-
-  pending_nondraw_layer->SetIsDrawnRenderSurfaceLayerListMember(false);
-
-  std::vector<PictureLayerImpl::Pair> layer_pairs;
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs, true);
-  EXPECT_EQ(1u, layer_pairs.size());
-  EXPECT_EQ(pending_layer, layer_pairs[0].pending);
-  EXPECT_EQ(nullptr, layer_pairs[0].active);
-
-  host_impl_->ActivateSyncTree();
-
-  LayerTreeImpl* active_tree = host_impl_->active_tree();
-  LayerImpl* active_layer = active_tree->root_layer();
-  FakePictureLayerImpl* active_nondraw_layer =
-      static_cast<FakePictureLayerImpl*>(active_layer->children()[0]);
-  EXPECT_NE(active_tree, pending_tree);
-  EXPECT_NE(active_layer, pending_layer);
-  EXPECT_NE(active_nondraw_layer, pending_nondraw_layer);
-  EXPECT_NE(nullptr, active_tree);
-  EXPECT_NE(nullptr, active_layer);
-  EXPECT_NE(nullptr, active_nondraw_layer);
-
-  active_nondraw_layer->SetIsDrawnRenderSurfaceLayerListMember(false);
-
-  host_impl_->CreatePendingTree();
-
-  layer_pairs.clear();
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs, true);
-  EXPECT_EQ(1u, layer_pairs.size());
-  EXPECT_EQ(active_layer, layer_pairs[0].active);
-  EXPECT_EQ(pending_layer, layer_pairs[0].pending);
-
-  // Activate, the active layer has no twin now.
-  host_impl_->ActivateSyncTree();
-
-  layer_pairs.clear();
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs, true);
-  EXPECT_EQ(1u, layer_pairs.size());
-  EXPECT_EQ(active_layer, layer_pairs[0].active);
-  EXPECT_EQ(nullptr, layer_pairs[0].pending);
-
-  // Create another layer in the pending tree that's not in the active tree. We
-  // should get two pairs.
-  host_impl_->CreatePendingTree();
-  host_impl_->pending_tree()->root_layer()->AddChild(
-      FakePictureLayerImpl::Create(host_impl_->pending_tree(), 11));
-
-  LayerImpl* new_pending_layer = pending_tree->root_layer()->children()[1];
-
-  layer_pairs.clear();
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs, true);
-  EXPECT_EQ(2u, layer_pairs.size());
-  // The pair ordering is flaky, so make it consistent.
-  if (layer_pairs[0].active != active_layer)
-    std::swap(layer_pairs[0], layer_pairs[1]);
-  EXPECT_EQ(active_layer, layer_pairs[0].active);
-  EXPECT_EQ(pending_layer, layer_pairs[0].pending);
-  EXPECT_EQ(new_pending_layer, layer_pairs[1].pending);
-  EXPECT_EQ(nullptr, layer_pairs[1].active);
-
-  host_impl_->pending_tree()->root_layer()->RemoveChild(new_pending_layer);
-
-  // Have the pending layer be part of the RSLL now. It should appear in the
-  // list without an active twin.
-  pending_nondraw_layer->SetIsDrawnRenderSurfaceLayerListMember(true);
-
-  layer_pairs.clear();
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs, true);
-  EXPECT_EQ(2u, layer_pairs.size());
-  // The pair ordering is flaky, so make it consistent.
-  if (layer_pairs[0].active != active_layer)
-    std::swap(layer_pairs[0], layer_pairs[1]);
-  EXPECT_EQ(active_layer, layer_pairs[0].active);
-  EXPECT_EQ(pending_layer, layer_pairs[0].pending);
-  EXPECT_EQ(pending_nondraw_layer, layer_pairs[1].pending);
-  EXPECT_EQ(nullptr, layer_pairs[1].active);
-
-  // Have the active layer be part of the RSLL now instead. It should appear in
-  // the list without a pending twin.
-  pending_nondraw_layer->SetIsDrawnRenderSurfaceLayerListMember(false);
-  active_nondraw_layer->SetIsDrawnRenderSurfaceLayerListMember(true);
-
-  layer_pairs.clear();
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs, true);
-  EXPECT_EQ(2u, layer_pairs.size());
-  // The pair ordering is flaky, so make it consistent.
-  if (layer_pairs[0].active != active_layer)
-    std::swap(layer_pairs[0], layer_pairs[1]);
-  EXPECT_EQ(active_layer, layer_pairs[0].active);
-  EXPECT_EQ(pending_layer, layer_pairs[0].pending);
-  EXPECT_EQ(nullptr, layer_pairs[1].pending);
-  EXPECT_EQ(active_nondraw_layer, layer_pairs[1].active);
-}
-
-TEST_F(LayerTreeHostImplTest, GetPictureLayerImplPairsWithNonRSLLMembers) {
-  host_impl_->CreatePendingTree();
-
-  scoped_ptr<PictureLayerImpl> layer =
-      FakePictureLayerImpl::Create(host_impl_->pending_tree(), 10);
-  layer->SetBounds(gfx::Size(10, 10));
-  scoped_ptr<FakePictureLayerImpl> nondraw_layer =
-      FakePictureLayerImpl::Create(host_impl_->pending_tree(), 12);
-  nondraw_layer->SetBounds(gfx::Size(10, 10));
-
-  scoped_refptr<RasterSource> pile(FakePicturePileImpl::CreateEmptyPile(
-      gfx::Size(10, 10), gfx::Size(10, 10)));
-  Region empty_invalidation;
-  const PictureLayerTilingSet* null_tiling_set = nullptr;
-  layer->set_gpu_raster_max_texture_size(host_impl_->device_viewport_size());
-  layer->UpdateRasterSource(pile, &empty_invalidation, null_tiling_set);
-  nondraw_layer->set_gpu_raster_max_texture_size(
-      host_impl_->device_viewport_size());
-  nondraw_layer->UpdateRasterSource(pile, &empty_invalidation, null_tiling_set);
-
-  layer->AddChild(nondraw_layer.Pass());
-  host_impl_->pending_tree()->SetRootLayer(layer.Pass());
-
-  LayerTreeImpl* pending_tree = host_impl_->pending_tree();
-  LayerImpl* pending_layer = pending_tree->root_layer();
-  FakePictureLayerImpl* pending_nondraw_layer =
-      static_cast<FakePictureLayerImpl*>(pending_layer->children()[0]);
-
-  pending_nondraw_layer->SetIsDrawnRenderSurfaceLayerListMember(false);
-
-  std::vector<PictureLayerImpl::Pair> layer_pairs;
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs, false);
-  EXPECT_EQ(2u, layer_pairs.size());
-  // The pair ordering is flaky, so make it consistent.
-  if (layer_pairs[0].pending != pending_layer)
-    std::swap(layer_pairs[0], layer_pairs[1]);
-  EXPECT_EQ(pending_layer, layer_pairs[0].pending);
-  EXPECT_EQ(nullptr, layer_pairs[0].active);
-  EXPECT_EQ(pending_nondraw_layer, layer_pairs[1].pending);
-  EXPECT_EQ(nullptr, layer_pairs[1].active);
-
-  host_impl_->ActivateSyncTree();
-
-  LayerTreeImpl* active_tree = host_impl_->active_tree();
-  LayerImpl* active_layer = active_tree->root_layer();
-  FakePictureLayerImpl* active_nondraw_layer =
-      static_cast<FakePictureLayerImpl*>(active_layer->children()[0]);
-  EXPECT_NE(active_tree, pending_tree);
-  EXPECT_NE(active_layer, pending_layer);
-  EXPECT_NE(active_nondraw_layer, pending_nondraw_layer);
-  EXPECT_NE(nullptr, active_tree);
-  EXPECT_NE(nullptr, active_layer);
-  EXPECT_NE(nullptr, active_nondraw_layer);
-
-  active_nondraw_layer->SetIsDrawnRenderSurfaceLayerListMember(false);
-
-  host_impl_->CreatePendingTree();
-
-  layer_pairs.clear();
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs, false);
-  EXPECT_EQ(2u, layer_pairs.size());
-  // The pair ordering is flaky, so make it consistent.
-  if (layer_pairs[0].active != active_layer)
-    std::swap(layer_pairs[0], layer_pairs[1]);
-  EXPECT_EQ(active_layer, layer_pairs[0].active);
-  EXPECT_EQ(pending_layer, layer_pairs[0].pending);
-  EXPECT_EQ(pending_nondraw_layer, layer_pairs[1].pending);
-  EXPECT_EQ(active_nondraw_layer, layer_pairs[1].active);
-
-  // Activate, the active layer has no twin now.
-  host_impl_->ActivateSyncTree();
-
-  layer_pairs.clear();
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs, false);
-  EXPECT_EQ(2u, layer_pairs.size());
-  // The pair ordering is flaky, so make it consistent.
-  if (layer_pairs[0].active != active_layer)
-    std::swap(layer_pairs[0], layer_pairs[1]);
-  EXPECT_EQ(active_layer, layer_pairs[0].active);
-  EXPECT_EQ(nullptr, layer_pairs[0].pending);
-  EXPECT_EQ(active_nondraw_layer, layer_pairs[1].active);
-  EXPECT_EQ(nullptr, layer_pairs[1].pending);
-
-  // Create another layer in the pending tree that's not in the active tree. We
-  // should get three pairs including the nondraw layers.
-  host_impl_->CreatePendingTree();
-  host_impl_->pending_tree()->root_layer()->AddChild(
-      FakePictureLayerImpl::Create(host_impl_->pending_tree(), 11));
-
-  LayerImpl* new_pending_layer = pending_tree->root_layer()->children()[1];
-
-  layer_pairs.clear();
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs, false);
-  EXPECT_EQ(3u, layer_pairs.size());
-  // The pair ordering is flaky, so make it consistent.
-  if (layer_pairs[0].active != active_layer)
-    std::swap(layer_pairs[0], layer_pairs[1]);
-  if (layer_pairs[0].active != active_layer)
-    std::swap(layer_pairs[0], layer_pairs[2]);
-  if (layer_pairs[1].pending != new_pending_layer)
-    std::swap(layer_pairs[1], layer_pairs[2]);
-  EXPECT_EQ(active_layer, layer_pairs[0].active);
-  EXPECT_EQ(pending_layer, layer_pairs[0].pending);
-  EXPECT_EQ(new_pending_layer, layer_pairs[1].pending);
-  EXPECT_EQ(nullptr, layer_pairs[1].active);
-  EXPECT_EQ(active_nondraw_layer, layer_pairs[2].active);
-  EXPECT_EQ(pending_nondraw_layer, layer_pairs[2].pending);
-
-  host_impl_->pending_tree()->root_layer()->RemoveChild(new_pending_layer);
-
-  // Have the pending layer be part of the RSLL now. It should appear in the
-  // list, as should its active twin since we don't request only layers with
-  // valid draw properties.
-  pending_nondraw_layer->SetIsDrawnRenderSurfaceLayerListMember(true);
-
-  layer_pairs.clear();
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs, false);
-  EXPECT_EQ(2u, layer_pairs.size());
-  // The pair ordering is flaky, so make it consistent.
-  if (layer_pairs[0].active != active_layer)
-    std::swap(layer_pairs[0], layer_pairs[1]);
-  EXPECT_EQ(active_layer, layer_pairs[0].active);
-  EXPECT_EQ(pending_layer, layer_pairs[0].pending);
-  EXPECT_EQ(pending_nondraw_layer, layer_pairs[1].pending);
-  EXPECT_EQ(active_nondraw_layer, layer_pairs[1].active);
-
-  // Have the active layer be part of the RSLL now instead. It should appear in
-  // the list, as should its pending twin since we don't request only layers
-  // with valid draw properties.
-  pending_nondraw_layer->SetIsDrawnRenderSurfaceLayerListMember(false);
-  active_nondraw_layer->SetIsDrawnRenderSurfaceLayerListMember(true);
-
-  layer_pairs.clear();
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs, false);
-  EXPECT_EQ(2u, layer_pairs.size());
-  // The pair ordering is flaky, so make it consistent.
-  if (layer_pairs[0].active != active_layer)
-    std::swap(layer_pairs[0], layer_pairs[1]);
-  EXPECT_EQ(active_layer, layer_pairs[0].active);
-  EXPECT_EQ(pending_layer, layer_pairs[0].pending);
-  EXPECT_EQ(active_nondraw_layer, layer_pairs[1].active);
-  EXPECT_EQ(pending_nondraw_layer, layer_pairs[1].pending);
-}
-
-TEST_F(LayerTreeHostImplTest, DidBecomeActive) {
-  host_impl_->CreatePendingTree();
-  host_impl_->ActivateSyncTree();
-  host_impl_->CreatePendingTree();
-
-  LayerTreeImpl* pending_tree = host_impl_->pending_tree();
-
-  scoped_ptr<FakePictureLayerImpl> pending_layer =
-      FakePictureLayerImpl::Create(pending_tree, 10);
-  FakePictureLayerImpl* raw_pending_layer = pending_layer.get();
-  pending_tree->SetRootLayer(pending_layer.Pass());
-  ASSERT_EQ(raw_pending_layer, pending_tree->root_layer());
-
-  EXPECT_EQ(0u, raw_pending_layer->did_become_active_call_count());
-  pending_tree->DidBecomeActive();
-  EXPECT_EQ(1u, raw_pending_layer->did_become_active_call_count());
-
-  scoped_ptr<FakePictureLayerImpl> mask_layer =
-      FakePictureLayerImpl::Create(pending_tree, 11);
-  FakePictureLayerImpl* raw_mask_layer = mask_layer.get();
-  raw_pending_layer->SetMaskLayer(mask_layer.Pass());
-  ASSERT_EQ(raw_mask_layer, raw_pending_layer->mask_layer());
-
-  EXPECT_EQ(1u, raw_pending_layer->did_become_active_call_count());
-  EXPECT_EQ(0u, raw_mask_layer->did_become_active_call_count());
-  pending_tree->DidBecomeActive();
-  EXPECT_EQ(2u, raw_pending_layer->did_become_active_call_count());
-  EXPECT_EQ(1u, raw_mask_layer->did_become_active_call_count());
-
-  scoped_ptr<FakePictureLayerImpl> replica_layer =
-      FakePictureLayerImpl::Create(pending_tree, 12);
-  scoped_ptr<FakePictureLayerImpl> replica_mask_layer =
-      FakePictureLayerImpl::Create(pending_tree, 13);
-  FakePictureLayerImpl* raw_replica_mask_layer = replica_mask_layer.get();
-  replica_layer->SetMaskLayer(replica_mask_layer.Pass());
-  raw_pending_layer->SetReplicaLayer(replica_layer.Pass());
-  ASSERT_EQ(raw_replica_mask_layer,
-            raw_pending_layer->replica_layer()->mask_layer());
-
-  EXPECT_EQ(2u, raw_pending_layer->did_become_active_call_count());
-  EXPECT_EQ(1u, raw_mask_layer->did_become_active_call_count());
-  EXPECT_EQ(0u, raw_replica_mask_layer->did_become_active_call_count());
-  pending_tree->DidBecomeActive();
-  EXPECT_EQ(3u, raw_pending_layer->did_become_active_call_count());
-  EXPECT_EQ(2u, raw_mask_layer->did_become_active_call_count());
-  EXPECT_EQ(1u, raw_replica_mask_layer->did_become_active_call_count());
-}
-
-TEST_F(LayerTreeHostImplTest, WheelScrollWithPageScaleFactorOnInnerLayer) {
-  LayerImpl* scroll_layer = SetupScrollAndContentsLayers(gfx::Size(100, 100));
-  host_impl_->SetViewportSize(gfx::Size(50, 50));
-  DrawFrame();
-
-  EXPECT_EQ(scroll_layer, host_impl_->InnerViewportScrollLayer());
-
-  float min_page_scale = 1.f, max_page_scale = 4.f;
-  float page_scale_factor = 1.f;
-
-  // The scroll deltas should have the page scale factor applied.
-  {
-    host_impl_->active_tree()->PushPageScaleFromMainThread(
-        page_scale_factor, min_page_scale, max_page_scale);
-    host_impl_->SetPageScaleOnActiveTree(page_scale_factor);
-    scroll_layer->SetScrollDelta(gfx::Vector2d());
-
-    float page_scale_delta = 2.f;
-    host_impl_->ScrollBegin(gfx::Point(), InputHandler::GESTURE);
-    host_impl_->PinchGestureBegin();
-    host_impl_->PinchGestureUpdate(page_scale_delta, gfx::Point());
-    host_impl_->PinchGestureEnd();
-    host_impl_->ScrollEnd();
-
-    gfx::Vector2dF scroll_delta(0, 5);
-    EXPECT_EQ(InputHandler::SCROLL_STARTED,
-              host_impl_->ScrollBegin(gfx::Point(), InputHandler::WHEEL));
-    EXPECT_VECTOR_EQ(gfx::Vector2dF(), scroll_layer->CurrentScrollOffset());
-
-    host_impl_->ScrollBy(gfx::Point(), scroll_delta);
-    host_impl_->ScrollEnd();
-    EXPECT_VECTOR_EQ(gfx::Vector2dF(0, 2.5),
-                     scroll_layer->CurrentScrollOffset());
-  }
-}
-
-class LayerTreeHostImplCountingLostSurfaces : public LayerTreeHostImplTest {
- public:
-  LayerTreeHostImplCountingLostSurfaces() : num_lost_surfaces_(0) {}
-  void DidLoseOutputSurfaceOnImplThread() override { num_lost_surfaces_++; }
-
- protected:
-  int num_lost_surfaces_;
-};
-
-TEST_F(LayerTreeHostImplCountingLostSurfaces, TwiceLostSurface) {
-  // Really we just need at least one client notification each time
-  // we go from having a valid output surface to not having a valid output
-  // surface.
-  EXPECT_EQ(0, num_lost_surfaces_);
-  host_impl_->DidLoseOutputSurface();
-  EXPECT_EQ(1, num_lost_surfaces_);
-  host_impl_->DidLoseOutputSurface();
-  EXPECT_LE(1, num_lost_surfaces_);
-}
-
-}  // namespace
-}  // namespace cc