b=521198 don't update when refresh is disabled r=roc

--HG--
extra : rebase_source : 8277aa725ef29138201d825b31aad6bec258a53d

view/src/nsViewManager.cpp

@@ -1552,6 +1552,10 @@ void nsViewManager::UpdateWidgetsForView(nsView* aView)
 {
   NS_PRECONDITION(aView, "Must have view!");
 
+  // No point forcing an update if invalidations have been suppressed.
+  if (!IsRefreshEnabled())
+    return;  
+
   nsWeakView parentWeakView = aView;
   if (aView->HasWidget()) {
     aView->GetWidget()->Update();  // Flushes Layout!