SetNeedsRedraw directly when updating a visible tile.

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 5b3766bce18a70cd2d932caf33b87ad378b83646..49b9ff256bc6a4e94dddc4e153f9abb714377313 100644
--- a/cc/trees/single_thread_proxy.h
+++ b/cc/trees/single_thread_proxy.h
@@ -66,7 +66,6 @@ class CC_EXPORT SingleThreadProxy : public Proxy,
   DrawResult ScheduledActionDrawAndSwapForced() override;
   void ScheduledActionCommit() override;
   void ScheduledActionAnimate() override;
-  void ScheduledActionUpdateVisibleTiles() override;
   void ScheduledActionActivateSyncTree() override;
   void ScheduledActionBeginOutputSurfaceCreation() override;
   void ScheduledActionManageTiles() override;
@@ -91,7 +90,6 @@ class CC_EXPORT SingleThreadProxy : public Proxy,
   void SetNeedsRedrawRectOnImplThread(const gfx::Rect& dirty_rect) override;
   void SetNeedsAnimateOnImplThread() override;
   void SetNeedsManageTilesOnImplThread() override;
-  void DidInitializeVisibleTileOnImplThread() override;
   void SetNeedsCommitOnImplThread() override;
   void PostAnimationEventsToMainThreadOnImplThread(
       scoped_ptr<AnimationEventsVector> events) override;