[webkit-reviews] review requested: [Bug 15596] REGRESSION: Intermittent crashes in WebCore::RenderLayer::calculateClipRects() : [Attachment 16785] Restore the null checks that were used before, since these methods get called on orphaned layers.

[bugzilla-daemon at webkit.org]

Dave Hyatt <hyatt at apple.com> has asked	for review:
Bug 15596: REGRESSION: Intermittent crashes in
WebCore::RenderLayer::calculateClipRects()
http://bugs.webkit.org/show_bug.cgi?id=15596

Attachment 16785: Restore the null checks that were used before, since these
methods get called on orphaned layers.
http://bugs.webkit.org/attachment.cgi?id=16785&action=edit