[Webkit-unassigned] [Bug 89590] New: showModalDialog is flaky in WebKit2

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=89590

           Summary: showModalDialog is flaky in WebKit2
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit2
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: beidson at apple.com


showModalDialog is flaky in WebKit2

The problem is that CoreIPC messages are randomly not handled while the modal dialog is displaying.  Those messages are in the RunLoop's function queue to be handled, but they are blocked on WebPageProxy::runModal() returning.

To fix this, we have to make two changes:
1 - Change RunLoop::performWork to not copy its queue to a temporary queue but rather to pull each function off the queue one at a time.
2 - Have WebPageProxy::runModal() wake up the runloop right before calling out to the UIClient so one the nested modal runloop has been entered there's a guarantee it will wake up to handle the remaining messages.

In radar as <rdar://problem/11653784>

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