cc: Move RasterBuffer implementations from ResourceProvider to RasterWorkerPool implementations.

cc/resources/rasterizer.h

Index: cc/resources/rasterizer.h
diff --git a/cc/resources/rasterizer.h b/cc/resources/rasterizer.h
index f59e72f45ab3e46c9bf2e52c609d2723c6e4aaa4..ef03046c4dc01a40500c1f6b88993b55f9a3da70 100644
--- a/cc/resources/rasterizer.h
+++ b/cc/resources/rasterizer.h
@@ -19,8 +19,9 @@ class RasterBuffer;
 
 class CC_EXPORT RasterizerTaskClient {
  public:
-  virtual RasterBuffer* AcquireBufferForRaster(RasterTask* task) = 0;
-  virtual void ReleaseBufferForRaster(RasterTask* task) = 0;
+  virtual scoped_ptr<RasterBuffer> AcquireBufferForRaster(
+      const Resource* resource) = 0;
+  virtual void ReleaseBufferForRaster(scoped_ptr<RasterBuffer> buffer) = 0;
 
  protected:
   virtual ~RasterizerTaskClient() {}