[webkit-reviews] review requested: [Bug 78862] Touch overflow scrolling elements should be split into layers : [Attachment 154694] Patch

[bugzilla-daemon at webkit.org]

Sami Kyöstilä <skyostil at chromium.org> has asked  for review:
Bug 78862: Touch overflow scrolling elements should be split into layers
https://bugs.webkit.org/show_bug.cgi?id=78862

Attachment 154694: Patch
https://bugs.webkit.org/attachment.cgi?id=154694&action=review

------- Additional Comments from Sami Kyöstilä <skyostil at chromium.org>
Work-in-progress patch against 91117
    - Register scrolling layers with ScrollingCoordinator.
    - Implement bounds origin in Chromium compositor.
    - Keep scrolling contents layer under overflow controls.
    - Don't reparent overflow controls inside scrolling content.
    - Promote composited scrolling layers to composited layers.
    - Include composited scrolling layers in memory usage estimate.
    - Avoid repaints when scrolling (not working yet).