Web Inspector: Option+Click on CSS url(...) should jump to resource view
https://bugs.webkit.org/show_bug.cgi?id=136965

Patch by Joseph Pecoraro <pecoraro@apple.com> on 2014-09-20
Reviewed by Timothy Hatcher.

* UserInterface/Views/CodeMirrorAdditions.js:
When parsing CSS url(...) tokens, the contents of url(...)
are a "string" type, not "atom".

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@173792 268f45cc-cd09-0410-ab3c-d52691b4dbfc