cc: Remove tiles from recycle tree that were deleted on active.

cc/layers/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_LAYERS_PICTURE_LAYER_IMPL_H_
 #define CC_LAYERS_PICTURE_LAYER_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 106 matching lines @@
   // PictureLayerTilingClient overrides.
   virtual scoped_refptr<Tile> CreateTile(
     PictureLayerTiling* tiling,
     const gfx::Rect& content_rect) OVERRIDE;
   virtual PicturePileImpl* GetPile() OVERRIDE;
   virtual gfx::Size CalculateTileSize(
       const gfx::Size& content_bounds) const OVERRIDE;
   virtual const Region* GetInvalidation() OVERRIDE;
   virtual const PictureLayerTiling* GetTwinTiling(
       const PictureLayerTiling* tiling) const OVERRIDE;
+  virtual PictureLayerTiling* GetRecycledTwinTiling(
+      const PictureLayerTiling* tiling) const OVERRIDE;
   virtual size_t GetMaxTilesForInterestArea() const OVERRIDE;
   virtual float GetSkewportTargetTimeInSeconds() const OVERRIDE;
   virtual int GetSkewportExtrapolationLimitInContentPixels() const OVERRIDE;
   virtual WhichTree GetTree() const OVERRIDE;
 
   // PushPropertiesTo active tree => pending tree.
   void SyncTiling(const PictureLayerTiling* tiling);
 
   // Mask-related functions
   void SetIsMask(bool is_mask);
@@ skipping 50 matching lines @@
   bool ShouldAdjustRasterScaleDuringScaleAnimations() const;
 
   virtual void GetDebugBorderProperties(
       SkColor* color, float* width) const OVERRIDE;
   virtual void AsValueInto(base::debug::TracedValue* dict) const OVERRIDE;
 
   virtual void UpdateIdealScales();
   float MaximumTilingContentsScale() const;
 
   PictureLayerImpl* twin_layer_;
+  PictureLayerImpl* recycled_twin_layer_;
 
   scoped_ptr<PictureLayerTilingSet> tilings_;
   scoped_refptr<PicturePileImpl> pile_;
   Region invalidation_;
 
   bool is_mask_;
 
   float ideal_page_scale_;
   float ideal_device_scale_;
   float ideal_source_scale_;
@@ skipping 18 matching lines @@
   gfx::Rect viewport_rect_for_tile_priority_;
   gfx::Transform screen_space_transform_for_tile_priority_;
 
   friend class PictureLayer;
   DISALLOW_COPY_AND_ASSIGN(PictureLayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_PICTURE_LAYER_IMPL_H_