Add PictureLayerTiling pointer to Tile

cc/tiles/tile.h

Index: cc/tiles/tile.h
diff --git a/cc/tiles/tile.h b/cc/tiles/tile.h
index 8da46d69657a08962e36599235b90ae4fe472d81..aecd220b272e53d10934f38c79a3b3821cc85dd5 100644
--- a/cc/tiles/tile.h
+++ b/cc/tiles/tile.h
@@ -17,6 +17,7 @@
 
 namespace cc {
 
+class PictureLayerTiling;
 class TileManager;
 
 class CC_EXPORT Tile {
@@ -28,18 +29,21 @@ class CC_EXPORT Tile {
 
   class CC_EXPORT CreateInfo {
    public:
+    const PictureLayerTiling* tiling;
     int tiling_i_index;
     int tiling_j_index;
     gfx::Rect enclosing_layer_rect;
     gfx::Rect content_rect;
     gfx::SizeF raster_scales;
 
-    CreateInfo(int tiling_i_index,
+    CreateInfo(const PictureLayerTiling* tiling,
+               int tiling_i_index,
                int tiling_j_index,
                const gfx::Rect& enclosing_layer_rect,
                const gfx::Rect& content_rect,
                const gfx::SizeF& raster_scales)
-        : tiling_i_index(tiling_i_index),
+        : tiling(tiling),
+          tiling_i_index(tiling_i_index),
           tiling_j_index(tiling_j_index),
           enclosing_layer_rect(enclosing_layer_rect),
           content_rect(content_rect),
@@ -113,6 +117,9 @@ class CC_EXPORT Tile {
     return is_solid_color_analysis_performed_;
   }
 
+  const PictureLayerTiling* tiling() const { return tiling_; }
+  void set_tiling(const PictureLayerTiling* tiling) { tiling_ = tiling; }
+
  private:
   friend class TileManager;
   friend class FakeTileManager;
@@ -127,6 +134,7 @@ class CC_EXPORT Tile {
   ~Tile();
 
   TileManager* const tile_manager_;
+  const PictureLayerTiling* tiling_;
   const gfx::Rect content_rect_;
   const gfx::Rect enclosing_layer_rect_;
   const gfx::SizeF raster_scales_;