Update from https://crrev.com/305340

cc/layers/ui_resource_layer.h

Index: cc/layers/ui_resource_layer.h
diff --git a/cc/layers/ui_resource_layer.h b/cc/layers/ui_resource_layer.h
index 3bfd9b2f109d1d0e995060d4d63141f21772d96b..dc2006e12bfa3d722e61903b6353c4ea0e13e70e 100644
--- a/cc/layers/ui_resource_layer.h
+++ b/cc/layers/ui_resource_layer.h
@@ -26,7 +26,9 @@ class CC_EXPORT UIResourceLayer : public Layer {
 
   void SetBitmap(const SkBitmap& skbitmap);
 
-  // An alternative way of setting the resource to allow for sharing.
+  // An alternative way of setting the resource to allow for sharing. If you use
+  // this method, you are responsible for updating the ID if the layer moves
+  // between compositors.
   void SetUIResourceId(UIResourceId resource_id);
 
   // Sets a UV transform to be used at draw time. Defaults to (0, 0) and (1, 1).
@@ -62,8 +64,6 @@ class CC_EXPORT UIResourceLayer : public Layer {
   scoped_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
   void RecreateUIResourceHolder();
 
-
-
   DISALLOW_COPY_AND_ASSIGN(UIResourceLayer);
 };