129691 2014-03-04 11:50:46 -0800 REGRESSION: Overlay scrollbars that have grown are sometimes askew in the track 2014-03-04 12:16:46 -0800 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 bdakin webkit-unassigned andersca bdakin cmarcelo commit-queue jamesr luiz simon.fraser thorton tonikitoo oldest_to_newest 986908 0 bdakin 2014-03-04 11:50:46 -0800 Overlay scrollbars that have grown are sometimes askew in the track. This started happening after we adopted the setPresentationValue ScrollbarPainter API which allowed us to update the position of the scrollbar knob from our secondary scrolling thread. This bug occurs when the scrollbar grows while it still thinks it is in presentation-value mode. Whenever the scrollbar grows, it should be in non-presentation value mode. <rdar://problem/15666846> 986915 1 225801 bdakin 2014-03-04 12:00:12 -0800 Created attachment 225801 Patch 986925 2 bdakin 2014-03-04 12:16:46 -0800 Thanks, Simon! http://trac.webkit.org/changeset/165069 225801 2014-03-04 12:00:12 -0800 2014-03-04 12:07:54 -0800 Patch for-review.txt text/plain 3901 bdakin SW5kZXg6IFNvdXJjZS9XZWJDb3JlL0NoYW5nZUxvZwo9PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Ci0tLSBTb3VyY2UvV2Vi Q29yZS9DaGFuZ2VMb2cJKHJldmlzaW9uIDE2NTA2NikKKysrIFNvdXJjZS9XZWJDb3JlL0NoYW5n ZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDI5IEBACisyMDE0LTAzLTA0ICBCZXRoIERh a2luICA8YmRha2luQGFwcGxlLmNvbT4KKworICAgICAgICBSRUdSRVNTSU9OOiBPdmVybGF5IHNj cm9sbGJhcnMgdGhhdCBoYXZlIGdyb3duIGFyZSBzb21ldGltZXMgYXNrZXcgaW4gdGhlIHRyYWNr CisgICAgICAgIGh0dHBzOi8vYnVncy53ZWJraXQub3JnL3Nob3dfYnVnLmNnaT9pZD0xMjk2OTEK KyAgICAgICAgLWFuZCBjb3JyZXNwb25kaW5nLQorICAgICAgICA8cmRhcjovL3Byb2JsZW0vMTU2 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