cc: Do bitmap conversion for RasterBuffer in the worker thread.

cc/resources/pixel_buffer_raster_worker_pool.h

 // Copyright 2013 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_RESOURCES_PIXEL_BUFFER_RASTER_WORKER_POOL_H_
 #define CC_RESOURCES_PIXEL_BUFFER_RASTER_WORKER_POOL_H_
 
 #include <deque>
 #include <vector>
 
@@ skipping 30 matching lines @@
   // Overridden from RasterWorkerPool:
   virtual Rasterizer* AsRasterizer() OVERRIDE;
 
   // Overridden from Rasterizer:
   virtual void SetClient(RasterizerClient* client) OVERRIDE;
   virtual void Shutdown() OVERRIDE;
   virtual void ScheduleTasks(RasterTaskQueue* queue) OVERRIDE;
   virtual void CheckForCompletedTasks() OVERRIDE;
 
   // Overridden from RasterizerTaskClient:
-  virtual SkCanvas* AcquireCanvasForRaster(RasterTask* task) OVERRIDE;
-  virtual void ReleaseCanvasForRaster(RasterTask* task) OVERRIDE;
+  virtual RasterBuffer* AcquireBufferForRaster(RasterTask* task) OVERRIDE;
+  virtual void ReleaseBufferForRaster(RasterTask* task) OVERRIDE;
 
  private:
   struct RasterTaskState {
     class TaskComparator {
      public:
       explicit TaskComparator(const RasterTask* task) : task_(task) {}
 
       bool operator()(const RasterTaskState& state) const {
         return state.task == task_;
       }
@@ skipping 75 matching lines @@
 
   base::WeakPtrFactory<PixelBufferRasterWorkerPool>
       raster_finished_weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PixelBufferRasterWorkerPool);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PIXEL_BUFFER_RASTER_WORKER_POOL_H_