Add a ScriptForbiddenScope to ContainerNode::insertBeforeCommon

Add one to complement the NoEventDispatchAssertion.

Review URL: https://codereview.chromium.org/308593002

git-svn-id: svn://svn.chromium.org/blink/trunk@175032 bbb929c8-8fbe-4397-9dbb-9b2b20218538

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

@@ -250,6 +250,7 @@ void ContainerNode::insertBefore(PassRefPtr<Node> newChild, Node* refChild, Exce
 void ContainerNode::insertBeforeCommon(Node& nextChild, Node& newChild)
 {
     NoEventDispatchAssertion assertNoEventDispatch;
+    ScriptForbiddenScope forbidScript;
 
     ASSERT(!newChild.parentNode()); // Use insertBefore if you need to handle reparenting (and want DOM mutation events).
     ASSERT(!newChild.nextSibling());