[Webkit-unassigned] [Bug 50963] New: REGRESSION(r73385): Scrolling nested iframes is fubar

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=50963

           Summary: REGRESSION(r73385): Scrolling nested iframes is fubar
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: Windows 7
            Status: NEW
          Severity: Blocker
          Priority: P2
         Component: Frames
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: dglazkov at chromium.org
                CC: hyatt at apple.com, jamesr at chromium.org
        Depends on: 49220


Created an attachment (id=76426)
 --> (https://bugs.webkit.org/attachment.cgi?id=76426&action=review)
Test case

Attaching the test case. To reproduce:

Scroll the outer frame first, then attempt wheel-scrolling the inner frame.

Expected: everything looks hunky-dory.
Actual: inner frame scrolls partially, looks not hunky-dory at all.

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