Aura: Resize locks with --ui-enable-threaded-compositing

cc/layer.h

Index: cc/layer.h
diff --git a/cc/layer.h b/cc/layer.h
index f16fbe79cfc6f2a72a5bf35f4a5d1d2a521188a9..b4bf968991f5bb4e3b745b0186942e559b494f1c 100644
--- a/cc/layer.h
+++ b/cc/layer.h
@@ -261,6 +261,9 @@ public:
 
     virtual ScrollbarLayerChromium* toScrollbarLayerChromium();
 
+    void setDeferUpdates(bool);
+    bool deferUpdates();
+
 protected:
     friend class CCLayerImpl;
     friend class TreeSynchronizer;
@@ -377,6 +380,9 @@ private:
 
     WebKit::WebAnimationDelegate* m_layerAnimationDelegate;
     WebKit::WebLayerScrollClient* m_layerScrollClient;
+
+    // Whether or not we should defer updates to the CCLayerImpl subtree rooted at this node.
+    bool m_deferUpdates;
 };
 
 void sortLayers(std::vector<scoped_refptr<LayerChromium> >::iterator, std::vector<scoped_refptr<LayerChromium> >::iterator, void*);