[webkit-reviews] review requested: [Bug 13417] Repro crash when the first argument to getMatchedCSSRules is not an element : [Attachment 14108] Add null check

[bugzilla-daemon at webkit.org]

mitz at webkit.org has asked  for review:
Bug 13417: Repro crash when the first argument to getMatchedCSSRules is not an
element
http://bugs.webkit.org/show_bug.cgi?id=13417

Attachment 14108: Add null check
http://bugs.webkit.org/attachment.cgi?id=14108&action=edit

------- Additional Comments from mitz at webkit.org
Includes layout test and change log.