When iframes and plugins gain/lose RenderLayers because of compositing changes, we need to force a layout, because the style system is unaware of these changes.
<rdar://problem/8181699>
The bug here was observed on gmail.com, when going from Compose back to Inbox, when bug 34009 was fixed.
Created attachment 61265 [details] Patch
Comment on attachment 61265 [details] Patch > +/* -webkit-box-shadow: 0 0 20px black;*/ Please remove! > + <script type="text/javascript" charset="utf-8"> No need to specify charset in this case. r=me
http://trac.webkit.org/changeset/63112