cc: Directly use property trees to calculate clip rect

cc/trees/layer_tree_impl_unittest.cc

 // Copyright 2014 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_impl.h"
 
 #include "cc/layers/heads_up_display_layer_impl.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/solid_color_scrollbar_layer_impl.h"
 #include "cc/test/fake_impl_task_runner_provider.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/fake_output_surface.h"
 #include "cc/test/geometry_test_utils.h"
 #include "cc/test/layer_tree_host_common_test.h"
 #include "cc/test/test_shared_bitmap_manager.h"
 #include "cc/test/test_task_graph_runner.h"
 #include "cc/trees/draw_property_utils.h"
 #include "cc/trees/layer_tree_host_impl.h"
 #include "ui/gfx/geometry/size_conversions.h"
 
 namespace cc {
 namespace {
 
 class LayerTreeImplTest : public LayerTreeHostCommonTest {
  public:
   LayerTreeImplTest() : output_surface_(FakeOutputSurface::Create3d()) {
     LayerTreeSettings settings;
     settings.layer_transforms_should_scale_layer_contents = true;
+    settings.verify_clip_tree_calculations = true;
     host_impl_.reset(new FakeLayerTreeHostImpl(settings, &task_runner_provider_,
                                                &shared_bitmap_manager_,
                                                &task_graph_runner_));
     host_impl_->SetVisible(true);
     EXPECT_TRUE(host_impl_->InitializeRenderer(output_surface_.get()));
   }
 
   FakeLayerTreeHostImpl& host_impl() { return *host_impl_; }
 
   LayerImpl* root_layer() { return host_impl_->active_tree()->root_layer(); }
@@ skipping 63 matching lines @@
   ASSERT_TRUE(result_layer);
   EXPECT_EQ(12345, result_layer->id());
 }
 
 TEST_F(LayerTreeImplTest, UpdateViewportAndHitTest) {
   // Ensures that the viewport rect is correctly updated by the clip tree.
   TestSharedBitmapManager shared_bitmap_manager;
   TestTaskGraphRunner task_graph_runner;
   FakeImplTaskRunnerProvider task_runner_provider;
   LayerTreeSettings settings;
+  settings.verify_clip_tree_calculations = true;
   scoped_ptr<OutputSurface> output_surface = FakeOutputSurface::Create3d();
   scoped_ptr<FakeLayerTreeHostImpl> host_impl;
   host_impl.reset(new FakeLayerTreeHostImpl(settings, &task_runner_provider,
                                             &shared_bitmap_manager,
                                             &task_graph_runner));
   host_impl->SetVisible(true);
   EXPECT_TRUE(host_impl->InitializeRenderer(output_surface.get()));
   scoped_ptr<LayerImpl> root =
       LayerImpl::Create(host_impl->active_tree(), 12345);
 
@@ skipping 2255 matching lines @@
 TEST_F(LayerTreeImplTest, DeviceScaleFactorNeedsDrawPropertiesUpdate) {
   host_impl().active_tree()->SetDeviceScaleFactor(1.f);
   host_impl().active_tree()->UpdateDrawProperties(false);
   EXPECT_FALSE(host_impl().active_tree()->needs_update_draw_properties());
   host_impl().active_tree()->SetDeviceScaleFactor(2.f);
   EXPECT_TRUE(host_impl().active_tree()->needs_update_draw_properties());
 }
 
 }  // namespace
 }  // namespace cc