Makes tile-creation lazy

cc/test/fake_picture_layer_tiling_client.h

Index: cc/test/fake_picture_layer_tiling_client.h
diff --git a/cc/test/fake_picture_layer_tiling_client.h b/cc/test/fake_picture_layer_tiling_client.h
index 4cde8cd4035323315b727b974dc3273c5bf5dbc2..9f413483e7cabeff3fb9993d6f7246e8e9e65301 100644
--- a/cc/test/fake_picture_layer_tiling_client.h
+++ b/cc/test/fake_picture_layer_tiling_client.h
@@ -25,13 +25,16 @@ class FakePictureLayerTilingClient : public PictureLayerTilingClient {
       PictureLayerTiling* tiling, gfx::Rect rect) OVERRIDE;
   virtual void UpdatePile(Tile* tile) OVERRIDE {}
   virtual gfx::Size CalculateTileSize(
-      gfx::Size current_tile_size,
       gfx::Size content_bounds) OVERRIDE;
 
   void SetTileSize(gfx::Size tile_size);
   gfx::Size TileSize() const { return tile_size_; }
   scoped_refptr<PicturePileImpl> pile() { return pile_; }
 
+  virtual const Region* GetInvalidation() OVERRIDE;
+  virtual const PictureLayerTiling* GetTwinTiling(
+      const PictureLayerTiling* tiling) OVERRIDE;
+
  protected:
   FakeTileManagerClient tile_manager_client_;
   FakeRenderingStatsInstrumentation stats_instrumentation_;