Assertion while scrolling news.google.com

https://bugs.webkit.org/show_bug.cgi?id=115303

Reviewed by Anders Carlsson.

Do not relayout when accessing script elements during painting.

* html/HTMLEmbedElement.cpp:
(WebCore::HTMLEmbedElement::renderWidgetForJSBindings):

Task-number: QTBUG-30892
Change-Id: Ide884c78dd6a359c0e0de22bb98774d7da90b901
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@154672 268f45cc-cd09-0410-ab3c-d52691b4dbfc
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>