cc: Cleanup class/struct forward declarations

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"
 #include "cc/raster/raster_buffer.h"
 #include "cc/raster/task_graph_runner.h"
 #include "cc/raster/tile_task.h"
 #include "cc/resources/resource_format.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"
 
-namespace base {
-class SequencedTaskRunner;
-}
-
 namespace cc {
 class Resource;
 
 class CC_EXPORT RasterBufferProvider {
  public:
   RasterBufferProvider();
   virtual ~RasterBufferProvider();
 
   // Utility function that will create a temporary bitmap and copy pixels to
   // |memory| when necessary. The |canvas_bitmap_rect| is the rect of the bitmap
@@ skipping 39 matching lines @@
   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_