[Webkit-unassigned] [Bug 33965] New: Clean up code that repositions scrollbars on painting

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=33965

           Summary: Clean up code that repositions scrollbars on painting
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh
        OS/Version: Mac OS X 10.5
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: simon.fraser at apple.com


Bug 33927 fixed an issue with plugin widgets caused by the fact that we use
tx,ty to position widgets during painting. This is wrong, since tx and ty may
be relative to some compositing layer.

The same issue exists with scrollbars, which get repositioned in
RenderLayer::positionOverflowControls(). We should update the scrollbar
positions eagerly after scrolling, as we do for RenderWidgets.

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