cc: Remove GetRasterSource from PictureLayerTilingClient.

cc/resources/picture_layer_tiling_set.h

Index: cc/resources/picture_layer_tiling_set.h
diff --git a/cc/resources/picture_layer_tiling_set.h b/cc/resources/picture_layer_tiling_set.h
index ddde1d7be42590903e4f2e5d2e1a0b0c019e2c62..1ac23b5872f8d2b81b81d5d59ef514be363fe932 100644
--- a/cc/resources/picture_layer_tiling_set.h
+++ b/cc/resources/picture_layer_tiling_set.h
@@ -34,7 +34,10 @@ class CC_EXPORT PictureLayerTilingSet {
     size_t end;
   };
 
-  explicit PictureLayerTilingSet(PictureLayerTilingClient* client);
+  static scoped_ptr<PictureLayerTilingSet> Create(
+      PictureLayerTilingClient* client,
+      RasterSource* raster_source);
+
   ~PictureLayerTilingSet();
 
   void SetClient(PictureLayerTilingClient* client);
@@ -72,6 +75,8 @@ class CC_EXPORT PictureLayerTilingSet {
   // Remove all tiles; keep all tilings.
   void RemoveAllTiles();
 
+  void SetRasterSource(RasterSource* raster_source);
+
   // For a given rect, iterates through tiles that can fill it.  If no
   // set of tiles with resources can fill the rect, then it will iterate
   // through null tiles with valid geometry_rect() until the rect is full.
@@ -123,8 +128,12 @@ class CC_EXPORT PictureLayerTilingSet {
   TilingRange GetTilingRange(TilingRangeType type) const;
 
  private:
+  PictureLayerTilingSet(PictureLayerTilingClient* client,
+                        RasterSource* raster_source);
+
   PictureLayerTilingClient* client_;
   ScopedPtrVector<PictureLayerTiling> tilings_;
+  RasterSource* raster_source_;
 
   friend class Iterator;
   DISALLOW_COPY_AND_ASSIGN(PictureLayerTilingSet);