cc: Remove the base RasterSource

cc/test/fake_picture_layer_tiling_client.h

 // Copyright 2012 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_TEST_FAKE_PICTURE_LAYER_TILING_CLIENT_H_
 #define CC_TEST_FAKE_PICTURE_LAYER_TILING_CLIENT_H_
 
 #include "cc/playback/display_list_raster_source.h"
 #include "cc/test/fake_tile_manager_client.h"
 #include "cc/tiles/picture_layer_tiling.h"
@@ skipping 28 matching lines @@
   }
   void set_twin_tiling(PictureLayerTiling* tiling) {
     twin_tiling_ = tiling;
     twin_set_ = nullptr;
   }
   void set_text_rect(const gfx::Rect& rect) { text_rect_ = rect; }
   void set_invalidation(const Region& region) { invalidation_ = region; }
   void set_has_valid_tile_priorities(bool has_valid_tile_priorities) {
     has_valid_tile_priorities_ = has_valid_tile_priorities;
   }
-  RasterSource* raster_source() { return raster_source_.get(); }
+  DisplayListRasterSource* raster_source() { return raster_source_.get(); }
 
   TileManager* tile_manager() const {
     return tile_manager_.get();
   }
 
  protected:
   FakeTileManagerClient tile_manager_client_;
   scoped_ptr<ResourcePool> resource_pool_;
   scoped_ptr<TileManager> tile_manager_;
   scoped_refptr<DisplayListRasterSource> raster_source_;
   gfx::Size tile_size_;
   PictureLayerTilingSet* twin_set_;
   PictureLayerTiling* twin_tiling_;
   gfx::Rect text_rect_;
   Region invalidation_;
   bool has_valid_tile_priorities_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_PICTURE_LAYER_TILING_CLIENT_H_