cc: DCHECK that the OutputSurface was released in ~LayerTreeHostImpl().

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 <stddef.h>
 
 #include <algorithm>
 #include <cmath>
@@ skipping 101 matching lines @@
     settings.renderer_settings.texture_id_allocation_chunk_size = 1;
     settings.gpu_rasterization_enabled = true;
     settings.verify_clip_tree_calculations = true;
     return settings;
   }
 
   void SetUp() override {
     CreateHostImpl(DefaultSettings(), CreateOutputSurface());
   }
 
-  void TearDown() override {}
+  void TearDown() override {
+    if (host_impl_)
+      host_impl_->ReleaseOutputSurface();
+  }
 
   void UpdateRendererCapabilitiesOnImplThread() override {}
   void DidLoseOutputSurfaceOnImplThread() override {}
   void CommitVSyncParameters(base::TimeTicks timebase,
                              base::TimeDelta interval) override {}
   void SetBeginFrameSource(BeginFrameSource* source) override {}
   void SetEstimatedParentDrawTime(base::TimeDelta draw_time) override {}
   void DidSwapBuffersOnImplThread() override {}
   void DidSwapBuffersCompleteOnImplThread() override {}
   void OnCanDrawStateChanged(bool can_draw) override {
@@ skipping 51 matching lines @@
   virtual bool CreateHostImpl(const LayerTreeSettings& settings,
                               std::unique_ptr<OutputSurface> output_surface) {
     return CreateHostImplWithTaskRunnerProvider(
         settings, std::move(output_surface), &task_runner_provider_);
   }
 
   virtual bool CreateHostImplWithTaskRunnerProvider(
       const LayerTreeSettings& settings,
       std::unique_ptr<OutputSurface> output_surface,
       TaskRunnerProvider* task_runner_provider) {
+    if (host_impl_)
+      host_impl_->ReleaseOutputSurface();
     host_impl_ = LayerTreeHostImpl::Create(
         settings, this, task_runner_provider, &stats_instrumentation_,
         &shared_bitmap_manager_, &gpu_memory_buffer_manager_,
         &task_graph_runner_,
         AnimationHost::CreateForTesting(ThreadInstance::IMPL), 0);
     output_surface_ = std::move(output_surface);
     host_impl_->SetVisible(true);
     bool init = host_impl_->InitializeRenderer(output_surface_.get());
     host_impl_->SetViewportSize(gfx::Size(10, 10));
     host_impl_->active_tree()->PushPageScaleFromMainThread(1.f, 1.f, 1.f);
@@ skipping 132 matching lines @@
     inner_scroll->test_properties()->AddChild(std::move(outer_clip));
     page_scale->test_properties()->AddChild(std::move(inner_scroll));
     inner_clip->test_properties()->AddChild(std::move(page_scale));
     root->test_properties()->AddChild(std::move(inner_clip));
 
     layer_tree_impl->SetRootLayer(std::move(root));
     layer_tree_impl->SetViewportLayersFromIds(
         Layer::INVALID_ID, kPageScaleLayerId, kInnerViewportScrollLayerId,
         kOuterViewportScrollLayerId);
 
+    layer_tree_impl->property_trees()->needs_rebuild = true;
+    layer_tree_impl->BuildLayerListAndPropertyTreesForTesting();
     layer_tree_impl->DidBecomeActive();
     return layer_tree_impl->InnerViewportScrollLayer();
   }
 
   LayerImpl* SetupScrollAndContentsLayers(const gfx::Size& content_size) {
-    LayerImpl* scroll_layer = CreateScrollAndContentsLayers(
-        host_impl_->active_tree(), content_size);
-    SetNeedsRebuildPropertyTrees();
-    RebuildPropertyTrees();
-    host_impl_->active_tree()->DidBecomeActive();
-    return scroll_layer;
+    return CreateScrollAndContentsLayers(host_impl_->active_tree(),
+                                         content_size);
   }
 
   // Sets up a typical virtual viewport setup with one child content layer.
   // Returns a pointer to the content layer.
   LayerImpl* CreateBasicVirtualViewportLayers(const gfx::Size& viewport_size,
                                               const gfx::Size& content_size) {
     // CreateScrollAndContentsLayers makes the outer viewport unscrollable and
     // the inner a different size from the outer. We'll reuse its layer
     // hierarchy but adjust the sizing to our needs.
     CreateScrollAndContentsLayers(host_impl_->active_tree(), content_size);
 
     LayerImpl* content_layer = host_impl_->OuterViewportScrollLayer()
                                    ->test_properties()
                                    ->children.back();
     content_layer->SetBounds(content_size);
     host_impl_->OuterViewportScrollLayer()->SetBounds(content_size);
 
     LayerImpl* outer_clip =
         host_impl_->OuterViewportScrollLayer()->test_properties()->parent;
     outer_clip->SetBounds(viewport_size);
 
     LayerImpl* inner_clip_layer = host_impl_->InnerViewportScrollLayer()
                                       ->test_properties()
                                       ->parent->test_properties()
                                       ->parent;
     inner_clip_layer->SetBounds(viewport_size);
     host_impl_->InnerViewportScrollLayer()->SetBounds(viewport_size);
+    host_impl_->active_tree()->property_trees()->needs_rebuild = true;
     host_impl_->active_tree()->BuildLayerListAndPropertyTreesForTesting();
 
     host_impl_->SetViewportSize(viewport_size);
     host_impl_->active_tree()->DidBecomeActive();
 
     return content_layer;
   }
 
   std::unique_ptr<LayerImpl> CreateScrollableLayer(int id,
                                                    const gfx::Size& size,
@@ skipping 213 matching lines @@
     root->test_properties()->children[1]->test_properties()->AddChild(
         LayerImpl::Create(host_impl_->active_tree(), 5));
     root->test_properties()
         ->children[1]
         ->test_properties()
         ->children[0]
         ->test_properties()
         ->AddChild(LayerImpl::Create(host_impl_->active_tree(), 6));
     host_impl_->active_tree()->SetRootLayer(std::move(root));
   }
+  host_impl_->active_tree()->BuildLayerListAndPropertyTreesForTesting();
   LayerImpl* root = host_impl_->active_tree()->root_layer();
 
   ExpectClearedScrollDeltasRecursive(root);
 
   std::unique_ptr<ScrollAndScaleSet> scroll_info;
 
   scroll_info = host_impl_->ProcessScrollDeltas();
   ASSERT_EQ(scroll_info->scrolls.size(), 0u);
   ExpectClearedScrollDeltasRecursive(root);
 
@@ skipping 725 matching lines @@
   root->SetBounds(gfx::Size(50, 50));
   root->test_properties()->force_render_surface = true;
 
   root->test_properties()->AddChild(
       LayerImpl::Create(host_impl_->active_tree(), 2));
   LayerImpl* child = root->test_properties()->children[0];
   child->SetBounds(gfx::Size(10, 10));
   child->draw_properties().visible_layer_rect = gfx::Rect(10, 10);
   child->SetDrawsContent(true);
 
+  host_impl_->active_tree()->BuildLayerListAndPropertyTreesForTesting();
+
   // Add a translate from 6,7 to 8,9.
   TransformOperations start;
   start.AppendTranslate(6.f, 7.f, 0.f);
   TransformOperations end;
   end.AppendTranslate(8.f, 9.f, 0.f);
   AddAnimatedTransformToLayerWithPlayer(child->id(), timeline(), 4.0, start,
                                         end);
 
   base::TimeTicks now = base::TimeTicks::Now();
   host_impl_->WillBeginImplFrame(
@@ skipping 66 matching lines @@
 
   host_impl_->CommitComplete();
 
   // Animations on the active tree should be started and ticked, and a new frame
   // should be requested to continue ticking them.
   EXPECT_TRUE(did_request_next_frame_);
   EXPECT_TRUE(did_request_redraw_);
   EXPECT_FALSE(did_request_commit_);
 
   // Delete the LayerTreeHostImpl before the TaskRunnerProvider goes away.
+  host_impl_->ReleaseOutputSurface();
   host_impl_ = nullptr;
 }
 
 TEST_F(LayerTreeHostImplTest, AnimationSchedulingOnLayerDestruction) {
   host_impl_->SetViewportSize(gfx::Size(50, 50));
 
   host_impl_->active_tree()->SetRootLayer(
       LayerImpl::Create(host_impl_->active_tree(), 1));
   LayerImpl* root = host_impl_->active_tree()->root_layer();
   root->SetBounds(gfx::Size(50, 50));
 
   root->test_properties()->AddChild(
       LayerImpl::Create(host_impl_->active_tree(), 2));
   LayerImpl* child = root->test_properties()->children[0];
   child->SetBounds(gfx::Size(10, 10));
   child->draw_properties().visible_layer_rect = gfx::Rect(10, 10);
   child->SetDrawsContent(true);
 
+  host_impl_->active_tree()->BuildLayerListAndPropertyTreesForTesting();
+
   // Add a translate animation.
   TransformOperations start;
   start.AppendTranslate(6.f, 7.f, 0.f);
   TransformOperations end;
   end.AppendTranslate(8.f, 9.f, 0.f);
   AddAnimatedTransformToLayerWithPlayer(child->id(), timeline(), 4.0, start,
                                         end);
 
   base::TimeTicks now = base::TimeTicks::Now();
   host_impl_->WillBeginImplFrame(
@@ skipping 12 matching lines @@
   // An animation exists on the active layer. Doing Animate() requests another
   // frame after the current one.
   EXPECT_TRUE(did_request_next_frame_);
   did_request_next_frame_ = false;
 
   // Destroy layer, unregister animation target (element).
   child->test_properties()->parent = nullptr;
   root->test_properties()->RemoveChild(child);
   child = nullptr;
 
+  host_impl_->active_tree()->BuildLayerListAndPropertyTreesForTesting();
+
   // Doing Animate() doesn't request another frame after the current one.
   host_impl_->Animate();
   EXPECT_FALSE(did_request_next_frame_);
 
   host_impl_->Animate();
   EXPECT_FALSE(did_request_next_frame_);
 }
 
 class MissingTilesLayer : public LayerImpl {
  public:
@@ skipping 971 matching lines @@
     ExpectNone(*scroll_info, scroll_layer->id());
   }
 }
 
 TEST_F(LayerTreeHostImplTest, PageScaleAnimationTransferedOnSyncTreeActivate) {
   host_impl_->CreatePendingTree();
   host_impl_->pending_tree()->PushPageScaleFromMainThread(1.f, 1.f, 1.f);
   CreateScrollAndContentsLayers(
       host_impl_->pending_tree(),
       gfx::Size(100, 100));
-  host_impl_->pending_tree()->BuildLayerListAndPropertyTreesForTesting();
   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);
@@ skipping 203 matching lines @@
     fake_current_physical_time_ = fake_now;
   }
 
  private:
   base::TimeTicks fake_current_physical_time_;
 };
 
 class LayerTreeHostImplTestScrollbarAnimation : public LayerTreeHostImplTest {
  protected:
   void SetupLayers(LayerTreeSettings settings) {
+    host_impl_->ReleaseOutputSurface();
+    host_impl_ = nullptr;
+
     gfx::Size content_size(100, 100);
 
     LayerTreeHostImplOverridePhysicalTime* host_impl_override_time =
         new LayerTreeHostImplOverridePhysicalTime(
             settings, this, &task_runner_provider_, &shared_bitmap_manager_,
             &task_graph_runner_, &stats_instrumentation_);
     host_impl_ = base::WrapUnique(host_impl_override_time);
     output_surface_ = CreateOutputSurface();
     host_impl_->SetVisible(true);
     host_impl_->InitializeRenderer(output_surface_.get());
@@ skipping 191 matching lines @@
     std::unique_ptr<SolidColorScrollbarLayerImpl> scrollbar =
         SolidColorScrollbarLayerImpl::Create(host_impl_->pending_tree(), 400,
                                              VERTICAL, 10, 0, false, true);
     scrollbar->test_properties()->opacity = 0.f;
     LayerImpl* scroll = host_impl_->pending_tree()->OuterViewportScrollLayer();
     LayerImpl* container =
         host_impl_->pending_tree()->InnerViewportContainerLayer();
     scrollbar->SetScrollLayerId(scroll->id());
     container->test_properties()->AddChild(std::move(scrollbar));
     host_impl_->pending_tree()->PushPageScaleFromMainThread(1.f, 1.f, 1.f);
+    host_impl_->pending_tree()->property_trees()->needs_rebuild = true;
     host_impl_->pending_tree()->BuildLayerListAndPropertyTreesForTesting();
     host_impl_->ActivateSyncTree();
 
     LayerImpl* active_scrollbar_layer =
         host_impl_->active_tree()->LayerById(400);
 
     EffectNode* active_tree_node =
         host_impl_->active_tree()->property_trees()->effect_tree.Node(
             active_scrollbar_layer->effect_tree_index());
     EXPECT_FLOAT_EQ(active_scrollbar_layer->Opacity(),
@@ skipping 223 matching lines @@
       SolidColorScrollbarLayerImpl::Create(host_impl_->active_tree(), 6,
                                            VERTICAL, 5, 5, true, true);
   scrollbar->SetScrollLayerId(root_scroll->id());
   scrollbar->SetDrawsContent(true);
   scrollbar->SetBounds(scrollbar_size);
   scrollbar->SetTouchEventHandlerRegion(gfx::Rect(scrollbar_size));
   host_impl_->active_tree()
       ->InnerViewportContainerLayer()
       ->test_properties()
       ->AddChild(std::move(scrollbar));
+  host_impl_->active_tree()->property_trees()->needs_rebuild = true;
+  host_impl_->active_tree()->BuildLayerListAndPropertyTreesForTesting();
   host_impl_->active_tree()->DidBecomeActive();
 
   DrawFrame();
   host_impl_->active_tree()->UpdateDrawProperties(false);
 
   ScrollbarAnimationControllerThinning* scrollbar_animation_controller =
       static_cast<ScrollbarAnimationControllerThinning*>(
           host_impl_->ScrollbarAnimationControllerForId(root_scroll->id()));
   scrollbar_animation_controller->set_mouse_move_distance_for_test(100.f);
 
@@ skipping 695 matching lines @@
             status.main_thread_scrolling_reasons);
   EXPECT_FALSE(did_request_redraw_);
   EXPECT_FALSE(did_request_commit_);
 }
 
 TEST_F(LayerTreeHostImplTest, ClampingAfterActivation) {
   host_impl_->CreatePendingTree();
   host_impl_->pending_tree()->PushPageScaleFromMainThread(1.f, 1.f, 1.f);
   CreateScrollAndContentsLayers(host_impl_->pending_tree(),
                                 gfx::Size(100, 100));
-  host_impl_->pending_tree()->BuildLayerListAndPropertyTreesForTesting();
   host_impl_->ActivateSyncTree();
 
   host_impl_->CreatePendingTree();
   const gfx::ScrollOffset pending_scroll = gfx::ScrollOffset(-100, -100);
   LayerImpl* active_outer_layer =
       host_impl_->active_tree()->OuterViewportScrollLayer();
   LayerImpl* pending_outer_layer =
       host_impl_->pending_tree()->OuterViewportScrollLayer();
   pending_outer_layer->layer_tree_impl()
       ->property_trees()
@@ skipping 79 matching lines @@
 
     outer_clip->test_properties()->AddChild(std::move(outer_scroll));
     root->test_properties()->AddChild(std::move(outer_clip));
     page_scale->test_properties()->AddChild(std::move(root));
     root_clip->test_properties()->AddChild(std::move(page_scale));
 
     tree_impl->SetRootLayer(std::move(root_clip));
     tree_impl->SetViewportLayersFromIds(Layer::INVALID_ID, page_scale_layer_id,
                                         inner_viewport_scroll_layer_id,
                                         outer_viewport_scroll_layer_id);
+    tree_impl->property_trees()->needs_rebuild = true;
     tree_impl->BuildLayerListAndPropertyTreesForTesting();
 
     host_impl_->SetViewportSize(inner_viewport_size);
     LayerImpl* root_clip_ptr = tree_impl->root_layer();
     EXPECT_EQ(inner_viewport_size, root_clip_ptr->bounds());
   }
 
  protected:
   gfx::Size layer_size_;
   gfx::Size clip_size_;
@@ skipping 1861 matching lines @@
             scroll_watcher.last_set_scroll_offset());
   host_impl_->ScrollEnd(EndState().get());
   host_impl_->SetSynchronousInputHandlerRootScrollOffset(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();
   host_impl_->pending_tree()->PushPageScaleFromMainThread(1.f, 1.f, 1.f);
   CreateScrollAndContentsLayers(host_impl_->pending_tree(), new_size);
-  host_impl_->pending_tree()->BuildLayerListAndPropertyTreesForTesting();
   host_impl_->ActivateSyncTree();
   EXPECT_EQ(gfx::SizeF(new_size), scroll_watcher.scrollable_size());
 
   // Tear down the LayerTreeHostImpl before the InputHandlerClient.
-  host_impl_.reset();
+  host_impl_->ReleaseOutputSurface();
+  host_impl_ = nullptr;
 }
 
 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());
@@ skipping 1145 matching lines @@
   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);
   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());
+
+  layer_tree_host_impl->ReleaseOutputSurface();
 }
 
 TEST_F(LayerTreeHostImplTest, RootLayerDoesntCreateExtraSurface) {
   std::unique_ptr<LayerImpl> root =
       FakeDrawableLayerImpl::Create(host_impl_->active_tree(), 1);
   std::unique_ptr<LayerImpl> child =
       FakeDrawableLayerImpl::Create(host_impl_->active_tree(), 2);
   child->SetBounds(gfx::Size(10, 10));
   child->SetDrawsContent(true);
   root->SetBounds(gfx::Size(10, 10));
@@ skipping 298 matching lines @@
     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);
     my_host_impl->DidDrawAllLayers(frame);
   }
+  my_host_impl->ReleaseOutputSurface();
 }
 
 TEST_F(LayerTreeHostImplTest, ContributingLayerEmptyScissorNoPartialSwap) {
   TestSharedBitmapManager shared_bitmap_manager;
   TestTaskGraphRunner task_graph_runner;
   scoped_refptr<TestContextProvider> provider(TestContextProvider::Create());
   provider->BindToCurrentThread();
   provider->TestContext3d()->set_have_post_sub_buffer(true);
   std::unique_ptr<OutputSurface> output_surface(
       FakeOutputSurface::Create3d(provider));
@@ skipping 10 matching lines @@
     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);
     my_host_impl->DidDrawAllLayers(frame);
   }
+  my_host_impl->ReleaseOutputSurface();
 }
 
 TEST_F(LayerTreeHostImplTest, LayersFreeTextures) {
   std::unique_ptr<TestWebGraphicsContext3D> context =
       TestWebGraphicsContext3D::Create();
   TestWebGraphicsContext3D* context3d = context.get();
   std::unique_ptr<OutputSurface> output_surface(
       FakeOutputSurface::Create3d(std::move(context)));
   CreateHostImpl(DefaultSettings(), std::move(output_surface));
 
@@ skipping 350 matching lines @@
                      resourceless_software_draw);
 
   EXPECT_EQ(1u, last_on_draw_frame_->will_draw_layers.size());
   EXPECT_EQ(host_impl_->active_tree()->root_layer(),
             last_on_draw_frame_->will_draw_layers[0]);
 }
 
 // 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) {
+  host_impl_->ReleaseOutputSurface();
+  host_impl_ = nullptr;
+
   LayerTreeSettings settings = DefaultSettings();
   host_impl_ = LayerTreeHostImpl::Create(
       settings, this, &task_runner_provider_, &stats_instrumentation_,
       &shared_bitmap_manager_, &gpu_memory_buffer_manager_, &task_graph_runner_,
       AnimationHost::CreateForTesting(ThreadInstance::IMPL), 0);
 
   output_surface_ =
       FakeOutputSurface::Create3d(TestWebGraphicsContext3D::Create());
   host_impl_->SetVisible(true);
   host_impl_->InitializeRenderer(output_surface_.get());
@@ skipping 162 matching lines @@
   LayerTreeHostImpl::FrameData frame;
   EXPECT_EQ(DRAW_SUCCESS, PrepareToDrawFrame(&frame));
   host_impl_->DrawLayers(&frame);
   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_->ReleaseOutputSurface();
   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
@@ skipping 2326 matching lines @@
   layer->SetDrawsContent(true);
   layer->tilings()->AddTiling(1.0f, raster_source_with_tiles);
   layer->UpdateRasterSource(raster_source_with_tiles, &empty_invalidation,
                             nullptr);
   layer->tilings()->tiling_at(0)->set_resolution(
       TileResolution::HIGH_RESOLUTION);
   layer->tilings()->tiling_at(0)->CreateAllTilesForTesting();
   layer->tilings()->UpdateTilePriorities(gfx::Rect(gfx::Size(10, 10)), 1.f, 1.0,
                                          Occlusion(), true);
   host_impl_->pending_tree()->SetRootLayer(std::move(layer));
+  host_impl_->pending_tree()->BuildLayerListAndPropertyTreesForTesting();
 
   FakePictureLayerImpl* root_layer = static_cast<FakePictureLayerImpl*>(
       host_impl_->pending_tree()->root_layer());
 
   root_layer->set_has_valid_tile_priorities(true);
   std::unique_ptr<RasterTilePriorityQueue> non_empty_raster_priority_queue_all =
       host_impl_->BuildRasterQueue(TreePriority::SAME_PRIORITY_FOR_BOTH_TREES,
                                    RasterTilePriorityQueue::Type::ALL);
   EXPECT_FALSE(non_empty_raster_priority_queue_all->IsEmpty());
 
@@ skipping 582 matching lines @@
     float expected_jitter =
         (i == pending_tree->kFixedPointHitsThreshold) ? 500 : 0;
     EXPECT_EQ(jitter, expected_jitter);
   }
 }
 
 // Checks that if we lose a GPU raster enabled OutputSurface and replace it
 // with a software OutputSurface, LayerTreeHostImpl correctly re-computes GPU
 // rasterization status.
 TEST_F(LayerTreeHostImplTest, RecomputeGpuRasterOnOutputSurfaceChange) {
+  host_impl_->ReleaseOutputSurface();
+  host_impl_ = nullptr;
+
   LayerTreeSettings settings = DefaultSettings();
   settings.gpu_rasterization_forced = true;
 
   host_impl_ = LayerTreeHostImpl::Create(
       settings, this, &task_runner_provider_, &stats_instrumentation_,
       &shared_bitmap_manager_, &gpu_memory_buffer_manager_, &task_graph_runner_,
       AnimationHost::CreateForTesting(ThreadInstance::IMPL), 0);
   host_impl_->SetVisible(true);
 
   // InitializeRenderer with a gpu-raster enabled output surface.
   auto gpu_raster_output_surface =
       FakeOutputSurface::Create3d(TestWebGraphicsContext3D::Create());
   host_impl_->InitializeRenderer(gpu_raster_output_surface.get());
   EXPECT_TRUE(host_impl_->use_gpu_rasterization());
 
   // Re-initialize with a software output surface.
   output_surface_ = FakeOutputSurface::CreateSoftware(
       base::WrapUnique(new SoftwareOutputDevice));
   host_impl_->InitializeRenderer(output_surface_.get());
   EXPECT_FALSE(host_impl_->use_gpu_rasterization());
 }
 
 }  // namespace
 }  // namespace cc