cc: Replace RasterBuffer::Acquire/ReleaseCanvas with Playback function.

cc/resources/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_RASTER_WORKER_POOL_H_
 #define CC_RESOURCES_RASTER_WORKER_POOL_H_
 
 #include "cc/resources/rasterizer.h"
+#include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace base {
 class SequencedTaskRunner;
 }
 
 namespace cc {
+class PicturePileImpl;
+class RenderingStatsInstrumentation;
 
 class CC_EXPORT RasterWorkerPool {
  public:
   static unsigned kBenchmarkRasterTaskPriority;
   static unsigned kRasterFinishedTaskPriority;
   static unsigned kRasterTaskPriorityBase;
 
   RasterWorkerPool();
   virtual ~RasterWorkerPool();
 
@@ skipping 28 matching lines @@
                                 size_t dependencies);
 
   // Utility function that can be used to build a task graph. Inserts nodes that
   // represent |task| and all its image decode dependencies in |graph|.
   static void InsertNodesForRasterTask(
       TaskGraph* graph,
       RasterTask* task,
       const ImageDecodeTask::Vector& decode_tasks,
       unsigned priority);
 
-  // Utility functions that transparently create a temporary bitmap and copy
-  // pixels to buffer when necessary.
-  static void AcquireBitmapForBuffer(SkBitmap* bitmap,
-                                     void* buffer,
-                                     ResourceFormat format,
-                                     const gfx::Size& size,
-                                     int stride);
-  static void ReleaseBitmapForBuffer(SkBitmap* bitmap,
-                                     void* buffer,
-                                     ResourceFormat format);
+  // Utility function that will create a temporary bitmap and copy pixels to
+  // |memory| when necessary.
+  static void PlaybackToMemory(void* memory,
+                               ResourceFormat format,
+                               const gfx::Size& size,
+                               int stride,
+                               const PicturePileImpl* picture_pile,
+                               const gfx::Rect& rect,
+                               float scale,
+                               RenderingStatsInstrumentation* stats);
 
   // Type-checking downcast routine.
   virtual Rasterizer* AsRasterizer() = 0;
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_RASTER_WORKER_POOL_H_