[Webkit-unassigned] [Bug 45631] New: scrollByLines() is now asynchronous on Windows

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=45631

           Summary: scrollByLines() is now asynchronous on Windows
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
               URL: http://trac.webkit.org/export/67358/trunk/LayoutTests/
                    fast/events/scroll-event-does-not-bubble.html
        OS/Version: Windows 7
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: mikelawther at chromium.org
                CC: hyatt at apple.com, pkasting at google.com,
                    ojan at chromium.org


Created an attachment (id=67356)
 --> (https://bugs.webkit.org/attachment.cgi?id=67356)
test for behaviour change 2)

Patch http://trac.webkit.org/changeset/67001/ introduced smooth scrolling on Windows, which changes two behaviours:
 1) the scroll event triggered by scrollByLines() is no longer fired synchronously; 
 2) the value of scrollTop is not synchronously set to the target value

It's 1) that causes fast/events/scroll-event-does-not-bubble.html to break on Windows.

Attached are two tests for these changed behaviours.

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