cc: GPU rasterize tiles synchronously in PrepareToDraw

cc/trees/layer_tree_host_impl.h

 // Copyright 2011 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_TREES_LAYER_TREE_HOST_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <list>
 #include <set>
 #include <string>
@@ skipping 169 matching lines @@
   virtual void BeginMainFrameAborted(bool did_handle);
   virtual void BeginCommit();
   virtual void CommitComplete();
   virtual void Animate(base::TimeTicks monotonic_time);
   virtual void UpdateAnimationState(bool start_ready_animations);
   void ActivateAnimations();
   void MainThreadHasStoppedFlinging();
   void DidAnimateScrollOffset();
   void SetViewportDamage(const gfx::Rect& damage_rect);
 
+  virtual void RasterizeTiles();
   virtual void ManageTiles();
 
   // Returns DRAW_SUCCESS unless problems occured preparing the frame, and we
   // should try to avoid displaying the frame. If PrepareToDraw is called,
   // DidDrawAllLayers must also be called, regardless of whether DrawLayers is
   // called between the two.
   virtual DrawResult PrepareToDraw(FrameData* frame);
   virtual void DrawLayers(FrameData* frame, base::TimeTicks frame_begin_time);
   // Must be called if and only if PrepareToDraw was called.
   void DidDrawAllLayers(const FrameData& frame);
@@ skipping 505 matching lines @@
 
   bool requires_high_res_to_draw_;
   bool required_for_draw_tile_is_top_of_raster_queue_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_