[webkit-reviews] review requested: [Bug 83804] [Chromium] Avoid unnecessary full tile updates for checkerboard tiles. : [Attachment 137157] Patch

[bugzilla-daemon at webkit.org]

David Reveman <reveman at chromium.org> has asked	for review:
Bug 83804: [Chromium] Avoid unnecessary full tile updates for checkerboard
tiles.
https://bugs.webkit.org/show_bug.cgi?id=83804

Attachment 137157: Patch
https://bugs.webkit.org/attachment.cgi?id=137157&action=review

------- Additional Comments from David Reveman <reveman at chromium.org>
Update unit test to verify new behavior