cc: Remove and Create the correct tiles when resizing live tiles rect

cc/resources/picture_layer_tiling.h

Index: cc/resources/picture_layer_tiling.h
diff --git a/cc/resources/picture_layer_tiling.h b/cc/resources/picture_layer_tiling.h
index 45edc7d71ae43657b5257dc84c62a1c277cf1472..35bbf94a297847aa6122f1d870bccb603ae092bb 100644
--- a/cc/resources/picture_layer_tiling.h
+++ b/cc/resources/picture_layer_tiling.h
@@ -298,8 +298,10 @@ class CC_EXPORT PictureLayerTiling {
                      const gfx::Size& layer_bounds,
                      PictureLayerTilingClient* client);
   void SetLiveTilesRect(const gfx::Rect& live_tiles_rect);
+  void VerifyLiveTilesRect();
   Tile* CreateTile(int i, int j, const PictureLayerTiling* twin_tiling);
-  void RemoveTileAt(int i, int j);
+  // Returns true if the Tile existed and was removed from the tiling.
+  bool RemoveTileAt(int i, int j, PictureLayerTiling* recycled_twin);
 
   // Computes a skewport. The calculation extrapolates the last visible
   // rect and the current visible rect to expand the skewport to where it