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

cc/resources/rasterizer.h

 // Copyright 2014 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_RASTERIZER_H_
 #define CC_RESOURCES_RASTERIZER_H_
 
 #include <vector>
 
 #include "base/callback.h"
 #include "cc/resources/resource_format.h"
 #include "cc/resources/task_graph_runner.h"
 
 class SkCanvas;

[reveman, 2014/08/12 14:31:26]

please remove this if no longer needed.

[auygun, 2014/08/13 14:18:53]

Acknowledged.

 
 namespace cc {
 class ImageDecodeTask;
 class RasterTask;
 class Resource;
+class RasterBuffer;
 
 class CC_EXPORT RasterizerTaskClient {
  public:
-  virtual SkCanvas* AcquireCanvasForRaster(RasterTask* task) = 0;
-  virtual void ReleaseCanvasForRaster(RasterTask* task) = 0;
+  virtual RasterBuffer* AcquireBufferForRaster(RasterTask* task) = 0;
+  virtual void ReleaseBufferForRaster(RasterTask* task) = 0;
 
  protected:
   virtual ~RasterizerTaskClient() {}
 };
 
 class CC_EXPORT RasterizerTask : public Task {
  public:
   typedef std::vector<scoped_refptr<RasterizerTask> > Vector;
 
   virtual void ScheduleOnOriginThread(RasterizerTaskClient* client) = 0;
@@ skipping 121 matching lines @@
   // Check for completed tasks and dispatch reply callbacks.
   virtual void CheckForCompletedTasks() = 0;
 
  protected:
   virtual ~Rasterizer() {}
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RASTERIZER_H_