[Webkit-unassigned] [Bug 172201] [macOS WK2] LayoutTest webaudio/silent-audio-interrupted-in-background.html is a flaky timeout on older OSes (El Capitan / Sierra)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=172201

--- Comment #10 from Chris Dumez <cdumez at apple.com> ---
(In reply to Chris Dumez from comment #9)
> This is somehow related to page visibility. The onvisibilitychange event
> handler on document sometimes does not get called after calling
> testRunner.setPageVisibility("hidden").

When setting the page visibility to hidden, we end up calling:
void TestController::setHidden(bool hidden)
{
    NSWindow *window = [mainWebView()->platformView() window];
    if (!window)
        return;

    if (hidden)
        [window orderOut:nil];
    else
        [window makeKeyAndOrderFront:nil];
}

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