Partial raster for GPU

cc/raster/raster_buffer_provider.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_RASTER_RASTER_BUFFER_PROVIDER_H_
 #define CC_RASTER_RASTER_BUFFER_PROVIDER_H_
 
 #include <stddef.h>
 
 #include "cc/playback/raster_source.h"
@@ skipping 45 matching lines @@
   // Used for syncing resources to the worker context.
   virtual void OrderingBarrier() = 0;
 
   // Returns the format to use for the tiles.
   virtual ResourceFormat GetResourceFormat(bool must_support_alpha) const = 0;
 
   // Determine if the resource requires swizzling.
   virtual bool IsResourceSwizzleRequired(bool must_support_alpha) const = 0;
 
   // Determine if the RasterBufferProvider can handle partial raster into
-  // resources.
-  virtual bool IsPartialRasterSupported() const = 0;
+  // the Resource provided in AcquireBufferForRaster.
+  virtual bool CanPartialRasterIntoProvidedResource() const = 0;
 
   // Shutdown for doing cleanup.
   virtual void Shutdown() = 0;
 
  protected:
   // Check if resource format matches output format.
   static bool ResourceFormatRequiresSwizzle(ResourceFormat format);
 };
 
 }  // namespace cc
 
 #endif  // CC_RASTER_RASTER_BUFFER_PROVIDER_H_