[webkit-reviews] review requested: [Bug 71385] [chromium] Threaded compositor should delegate overflow div/iframe scroll events to WebKit : [Attachment 116256] Patch for hit testing input events

[bugzilla-daemon at webkit.org]

Sami Kyostila <skyostil at google.com> has asked  for review:
Bug 71385: [chromium] Threaded compositor should delegate overflow div/iframe
scroll events to WebKit
https://bugs.webkit.org/show_bug.cgi?id=71385

Attachment 116256: Patch for hit testing input events
https://bugs.webkit.org/attachment.cgi?id=116256&action=review

------- Additional Comments from Sami Kyostila <skyostil at google.com>
The attached patch adds metadata to GraphicsLayers about scrollable elements
within them. When the compositor receives an input event, it is hit tested
against these elements. If the test succeeds, the event is delegated to the
main thread instead of being processed by the compositor.

The patch also modifies layerTreeAsText() to accept a bitmask specifying the
data to output in a similar way to renderTreeAsText().