cc: Use multiple PrepareTiles approaches

cc/trees/single_thread_proxy.h

Index: cc/trees/single_thread_proxy.h
diff --git a/cc/trees/single_thread_proxy.h b/cc/trees/single_thread_proxy.h
index 98ac5e5c7d40ae7bae0ea8b9e0740e865f6068eb..d358f8bdcfd64fdf17c35e207b9af143e73653db 100644
--- a/cc/trees/single_thread_proxy.h
+++ b/cc/trees/single_thread_proxy.h
@@ -95,10 +95,11 @@ class CC_EXPORT SingleThreadProxy : public Proxy,
   void OnCanDrawStateChanged(bool can_draw) override;
   void NotifyReadyToActivate() override;
   void NotifyReadyToDraw() override;
+  void SetRequiresHighResToDraw(bool required) override;
   void SetNeedsRedrawOnImplThread() override;
   void SetNeedsRedrawRectOnImplThread(const gfx::Rect& dirty_rect) override;
   void SetNeedsAnimateOnImplThread() override;
-  void SetNeedsPrepareTilesOnImplThread() override;
+  void SetNeedsPrepareTilesOnImplThread(bool for_commit) override;
   void SetNeedsCommitOnImplThread() override;
   void SetVideoNeedsBeginFrames(bool needs_begin_frames) override;
   void PostAnimationEventsToMainThreadOnImplThread(
@@ -110,7 +111,6 @@ class CC_EXPORT SingleThreadProxy : public Proxy,
   void PostDelayedAnimationTaskOnImplThread(const base::Closure& task,
                                             base::TimeDelta delay) override {}
   void DidActivateSyncTree() override;
-  void DidPrepareTiles() override;
   void DidCompletePageScaleAnimationOnImplThread() override;
   void OnDrawForOutputSurface() override;