Use SwapBuffersWithBounds on Chromecast

cc/output/overlay_processor.h

Index: cc/output/overlay_processor.h
diff --git a/cc/output/overlay_processor.h b/cc/output/overlay_processor.h
index b8957052967e07a1d41363ff4fa1e9b07789e7d7..e412f4bc6c70e16c26076a0b3eb7250c239a7be6 100644
--- a/cc/output/overlay_processor.h
+++ b/cc/output/overlay_processor.h
@@ -29,6 +29,8 @@ class CC_EXPORT OverlayProcessor {
     virtual bool Attempt(ResourceProvider* resource_provider,
                          RenderPass* render_pass,
                          OverlayCandidateList* candidates) = 0;
+
+    virtual void GetContentBounds(std::vector<gfx::Rect>* bounds);
   };
   using StrategyList = std::vector<std::unique_ptr<Strategy>>;
 
@@ -38,6 +40,7 @@ class CC_EXPORT OverlayProcessor {
   virtual void Initialize();
 
   gfx::Rect GetAndResetOverlayDamage();
+  void GetContentBounds(std::vector<gfx::Rect>* content_bounds);
 
   // Attempt to replace quads from the specified root render pass with overlays
   // or CALayers. This must be called every frame.
@@ -55,6 +58,7 @@ class CC_EXPORT OverlayProcessor {
   OutputSurface* surface_;
   gfx::Rect overlay_damage_rect_;
   gfx::Rect previous_frame_underlay_rect_;
+  std::vector<gfx::Rect> content_bounds_;
 
  private:
   bool ProcessForCALayers(