Bug 122335

Summary:	[mac][wk2] dispatchAfterEnsuringUpdatedScrollPosition doesn't seem to always work
Product:	WebKit	Reporter:	Tim Horton <thorton>
Component:	WebKit2	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	andersca, ap, bdakin, sam, simon.fraser
Priority:	P2
Version:	528+ (Nightly build)
Hardware:	Unspecified
OS:	Unspecified

Description Tim Horton 2013-10-04 11:37:05 PDT

http://trac.webkit.org/changeset/115751 made forceRepaintAsync use dispatchAfterEnsuringUpdatedScrollPosition. However, in https://bugs.webkit.org/show_bug.cgi?id=122299 (and in experiments with turning on tiled drawing for all tests), we've seen cases where even after waiting for a force repaint to finish, the main thread's notion of the scroll position can be wrong.

This probably blocks turning on threaded scrolling for all of the tests.