[webkit-reviews] review requested: [Bug 137430] Use is<>() / downcast<>() for ElementData subclasses : [Attachment 239292] Patch

[bugzilla-daemon at webkit.org]

Chris Dumez <cdumez at apple.com> has asked  for review:
Bug 137430: Use is<>() / downcast<>() for ElementData subclasses
https://bugs.webkit.org/show_bug.cgi?id=137430

Attachment 239292: Patch
https://bugs.webkit.org/attachment.cgi?id=239292&action=review