Since the font smoothing setting is now part of the font description, add a version of -[NSString _web_drawAtPoint:font:textColor:] that takes a smoothing setting and deprecate +[WebView _setShouldUseFontSmoothing:] and the WebCore machinery to support it.
<rdar://problem/7233974>
First part: <http://trac.webkit.org/projects/webkit/changeset/63595>