Turn off computation of the interest rect in cc in synchronized paint mode.

cc/layers/picture_layer_unittest.cc

 // Copyright 2013 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/layers/picture_layer.h"
 
 #include "base/thread_task_runner_handle.h"
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/layer_settings.h"
 #include "cc/layers/picture_layer_impl.h"
 #include "cc/playback/display_item_list_settings.h"
 #include "cc/test/fake_display_list_recording_source.h"
 #include "cc/test/fake_layer_tree_host.h"
 #include "cc/test/fake_picture_layer.h"
 #include "cc/test/fake_picture_layer_impl.h"
 #include "cc/test/fake_proxy.h"
 #include "cc/test/test_shared_bitmap_manager.h"
 #include "cc/test/test_task_graph_runner.h"
 #include "cc/trees/single_thread_proxy.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
 namespace {
 
 class MockContentLayerClient : public ContentLayerClient {
  public:
+  gfx::Rect PaintableRegion() override { return gfx::Rect(); }
   scoped_refptr<DisplayItemList> PaintContentsToDisplayList(
       const gfx::Rect& clip,
       PaintingControlSetting picture_control) override {
     return DisplayItemList::Create(clip, DisplayItemListSettings());
   }
   bool FillsBoundsCompletely() const override { return false; };
   size_t GetApproximateUnsharedMemoryUsage() const override { return 0; }
 };
 
 TEST(PictureLayerTest, NoTilesIfEmptyBounds) {
@@ skipping 129 matching lines @@
   // Do a main frame, record the picture layers. The frame number has changed
   // non-monotonically.
   layer->SetNeedsDisplay();
   host2->Composite(base::TimeTicks::Now());
   EXPECT_EQ(3, layer->update_count());
   EXPECT_EQ(1, host2->source_frame_number());
 }
 
 }  // namespace
 }  // namespace cc