cc: Update picture pile on tiles to prevent memory leak

cc/picture_layer_impl.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_PICTURE_LAYER_IMPL_H_
 #define CC_PICTURE_LAYER_IMPL_H_
 
 #include "cc/layer_impl.h"
 #include "cc/picture_layer_tiling.h"
 #include "cc/picture_layer_tiling_set.h"
@@ skipping 26 matching lines @@
   virtual void calculateContentsScale(
       float ideal_contents_scale,
       float* contents_scale_x,
       float* contents_scale_y,
       gfx::Size* content_bounds) OVERRIDE;
   virtual skia::RefPtr<SkPicture> getPicture() OVERRIDE;
 
   // PictureLayerTilingClient overrides.
   virtual scoped_refptr<Tile> CreateTile(PictureLayerTiling*,
                                          gfx::Rect) OVERRIDE;
+  virtual void UpdatePile(Tile* tile) OVERRIDE;
 
   // PushPropertiesTo active tree => pending tree
   void SyncFromActiveLayer();
   void SyncTiling(const PictureLayerTiling* tiling);
 
   // Mask-related functions
   void SetIsMask(bool is_mask);
   virtual ResourceProvider::ResourceId contentsResourceId() const OVERRIDE;
 
   virtual bool areVisibleResourcesReady() const OVERRIDE;
@@ skipping 18 matching lines @@
   float ideal_contents_scale_;
   bool is_mask_;
 
   friend class PictureLayer;
   DISALLOW_COPY_AND_ASSIGN(PictureLayerImpl);
 };
 
 }
 
 #endif  // CC_PICTURE_LAYER_IMPL_H_