cc: Update picture pile on tiles to prevent memory leak

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/picture_layer_tiling.h"
 #include "cc/picture_pile_impl.h"
 #include "cc/test/fake_tile_manager_client.h"
 #include "cc/tile.h"
 #include "cc/tile_manager.h"
 #include "ui/gfx/rect.h"
 
 namespace cc {
 
 class FakePictureLayerTilingClient : public PictureLayerTilingClient {
  public:
   FakePictureLayerTilingClient();
   virtual ~FakePictureLayerTilingClient();
 
   // PictureLayerTilingClient implementation.
   virtual scoped_refptr<Tile> CreateTile(
       PictureLayerTiling* tiling, gfx::Rect rect) OVERRIDE;
+  virtual void UpdatePile(Tile* tile) OVERRIDE {}
 
   void SetTileSize(gfx::Size tile_size);
   gfx::Size TileSize() const { return tile_size_; }
 
  protected:
   FakeTileManagerClient tile_manager_client_;
   TileManager tile_manager_;
   scoped_refptr<PicturePileImpl> pile_;
   gfx::Size tile_size_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TEST_FAKE_PICTURE_LAYER_TILING_CLIENT_H_