[webkit-reviews] review requested: [Bug 73350] [chromium] Allow scrolling non-root layers in the compositor thread : [Attachment 122229] Patch

[bugzilla-daemon at webkit.org]

Sami Kyostila <skyostil at google.com> has asked  for review:
Bug 73350: [chromium] Allow scrolling non-root layers in the compositor thread
https://bugs.webkit.org/show_bug.cgi?id=73350

Attachment 122229: Patch
https://bugs.webkit.org/attachment.cgi?id=122229&action=review

------- Additional Comments from Sami Kyostila <skyostil at google.com>
 - Rebased.
 - Check whether scrollable layer still exists in
CCLayerTreeHostImpl::setRootLayer() instead as walking up CCLayerImpl::parent()
pointers is not safe.