[webkit-reviews] review requested: [Bug 25755] Implement ARIA grid role : [Attachment 30289] patch

[bugzilla-daemon at webkit.org]

chris fleizach <cfleizach at apple.com> has asked	for review:
Bug 25755: Implement ARIA grid role
https://bugs.webkit.org/show_bug.cgi?id=25755

Attachment 30289: patch
https://bugs.webkit.org/attachment.cgi?id=30289&action=review

------- Additional Comments from chris fleizach <cfleizach at apple.com>
adds checks to all the places where we do static casts to make sure the element
is the correct type