Defer widget updates in ContainerNode::parserRemoveChild.

third_party/WebKit/Source/core/dom/ContainerNode.cpp

Index: third_party/WebKit/Source/core/dom/ContainerNode.cpp
diff --git a/third_party/WebKit/Source/core/dom/ContainerNode.cpp b/third_party/WebKit/Source/core/dom/ContainerNode.cpp
index 82cb94ca00c6813c593ae0c902711d08160aef2b..9ca0fce832d82f3584f37e07d81a95b6737a323f 100644
--- a/third_party/WebKit/Source/core/dom/ContainerNode.cpp
+++ b/third_party/WebKit/Source/core/dom/ContainerNode.cpp
@@ -638,6 +638,7 @@ void ContainerNode::parserRemoveChild(Node& oldChild)
     ChildListMutationScope(*this).willRemoveChild(oldChild);
     oldChild.notifyMutationObserversNodeWillDetach();
 
+    HTMLFrameOwnerElement::UpdateSuspendScope suspendWidgetHierarchyUpdates;
     Node* prev = oldChild.previousSibling();
     Node* next = oldChild.nextSibling();
     removeBetween(prev, next, oldChild);