Unreviewed, rolling out r150168.
http://trac.webkit.org/changeset/150168
https://bugs.webkit.org/show_bug.cgi?id=116214

broke the world on Mountain Lion (Requested by thorton on
#webkit).

* WebView/WebFrameView.mm:
(-[WebFrameView drawRect:]):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150180 268f45cc-cd09-0410-ab3c-d52691b4dbfc