[Webkit-unassigned] [Bug 49842] New: [chromium] Accumulated scroll damage rect should be in the content space

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=49842

           Summary: [chromium] Accumulated scroll damage rect should be in
                    the content space
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: klobag at chromium.org


The accumulated scroll damage rect in WebViewImpl::scrollRootLayerRect() should be in the content space. Otherwise when scrollRootLayerRect() is called more frequent than the scroll damage rect is consumed in doComposite(), we will have garbage in the final result. e.g. if scrollRootLayerRect() is called twice with (10, 0) before doComposite() is called, the accumulated screen rect will have width of 10 while the expected width should be 20.

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