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

cc/proxy.h

Index: cc/proxy.h
diff --git a/cc/proxy.h b/cc/proxy.h
index daddadeeb10ed45e697faa59f50b8cc283dccd5d..f3edbaaa74b9e122b3b55c8fe035fa33cfebb549 100644
--- a/cc/proxy.h
+++ b/cc/proxy.h
@@ -65,6 +65,10 @@ public:
     virtual void setNeedsCommit() = 0;
     virtual void setNeedsRedraw() = 0;
 
+    // Defers commits until it is reset. It is only supported when in threaded mode. It's an error to make a sync call
+    // like compositeAndReadback while commits are deferred.
+    virtual void setDeferCommits(bool) = 0;
+
     virtual void didAddAnimation() = 0;
 
     virtual bool commitRequested() const = 0;