https://bugs.webkit.org/show_bug.cgi?id=113392
<rdar://problem/13474743>

Reviewed by Enrica Casucci.

Some internal fonts on OS X have a family name that
isn't listed in availableFontFamilies. In this case
we should use the font name rather than the family
name when looking for a match.

* platform/mac/ThemeMac.h: NSFont category to provide a web-friendly family name.
* platform/mac/ThemeMac.mm:
(-[NSFont webCoreFamilyName]): Returns the font name for internal fonts, otherwise the family name.
(WebCore::ThemeMac::controlFont):
* rendering/RenderThemeMacShared.mm: Use the webCoreFamilyName.
(WebCore::RenderThemeMacShared::systemFont): Ditto.
(WebCore::RenderThemeMacShared::setFontFromControlSize): Ditto.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146995 268f45cc-cd09-0410-ab3c-d52691b4dbfc