[webkit-reviews] review requested: [Bug 137449] Use is<>() / downcast<>() for ScrollingTree subclasses : [Attachment 239339] Patch

[bugzilla-daemon at webkit.org]

Chris Dumez <cdumez at apple.com> has asked  for review:
Bug 137449: Use is<>() / downcast<>() for ScrollingTree subclasses
https://bugs.webkit.org/show_bug.cgi?id=137449

Attachment 239339: Patch
https://bugs.webkit.org/attachment.cgi?id=239339&action=review