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

cc/test/fake_content_layer_client.h

 // Copyright 2012 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.
 
 #ifndef CC_TEST_FAKE_CONTENT_LAYER_CLIENT_H_
 #define CC_TEST_FAKE_CONTENT_LAYER_CLIENT_H_
 
 #include <utility>
 #include <vector>
 
@@ skipping 20 matching lines @@
     ~ImageData();
     skia::RefPtr<const SkImage> image;
     gfx::Point point;
     gfx::Transform transform;
     SkPaint paint;
   };
 
   FakeContentLayerClient();
   ~FakeContentLayerClient() override;
 
+  gfx::Rect PaintableRegion() override;
   scoped_refptr<DisplayItemList> PaintContentsToDisplayList(
       const gfx::Rect& clip,
       PaintingControlSetting painting_control) override;
   bool FillsBoundsCompletely() const override;
   size_t GetApproximateUnsharedMemoryUsage() const override;
 
   void set_fill_with_nonsolid_color(bool nonsolid) {
     fill_with_nonsolid_color_ = nonsolid;
   }
 
@@ skipping 22 matching lines @@
   SkCanvas* last_canvas() const { return last_canvas_; }
 
   PaintingControlSetting last_painting_control() const {
     return last_painting_control_;
   }
 
   void set_reported_memory_usage(size_t reported_memory_usage) {
     reported_memory_usage_ = reported_memory_usage;
   }
 
+  void set_bounds(gfx::Size bounds) {
+    bounds_ = bounds;
+    bounds_set_ = true;
+  }
+
  private:
   typedef std::vector<std::pair<gfx::RectF, SkPaint>> RectPaintVector;
   typedef std::vector<ImageData> ImageVector;
 
   bool fill_with_nonsolid_color_;
   RectPaintVector draw_rects_;
   ImageVector draw_images_;
   SkCanvas* last_canvas_;
   PaintingControlSetting last_painting_control_;
   size_t reported_memory_usage_;
+  gfx::Size bounds_;
+  bool bounds_set_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_CONTENT_LAYER_CLIENT_H_