[#7] Resubmitted - Pass gfx structs by const ref (gfx::Size)

cc/layers/tiled_layer.h

Index: cc/layers/tiled_layer.h
diff --git a/cc/layers/tiled_layer.h b/cc/layers/tiled_layer.h
index f2f7e96293f38632823ca6245ec8b09f59249ccc..50e2b674f46d5209f76a9c06d29ffcfdea05711a 100644
--- a/cc/layers/tiled_layer.h
+++ b/cc/layers/tiled_layer.h
@@ -46,7 +46,7 @@ class CC_EXPORT TiledLayer : public ContentsScalingLayer {
   void UpdateBounds();
 
   // Exposed to subclasses for testing.
-  void SetTileSize(gfx::Size size);
+  void SetTileSize(const gfx::Size& size);
   void SetTextureFormat(ResourceFormat texture_format) {
     texture_format_ = texture_format;
   }