[webkit-reviews] review requested: [Bug 76838] [chromium] Cull occluded tiles during paint : [Attachment 130655] Patch

[bugzilla-daemon at webkit.org]

Dana Jansens <danakj at chromium.org> has asked  for review:
Bug 76838: [chromium] Cull occluded tiles during paint
https://bugs.webkit.org/show_bug.cgi?id=76838

Attachment 130655: Patch
https://bugs.webkit.org/attachment.cgi?id=130655&action=review

------- Additional Comments from Dana Jansens <danakj at chromium.org>
- Don't paint-cull tiles if their dirty rect is occluded!
- Added unit test coverage for this.

If the tile is dirty, but party visible, paint-culling it would cause us to not
push it to impl thread, making for bad times.