[Webkit-unassigned] [Bug 186593] New: User gesture context is not passed via MessageChannel

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=186593

            Bug ID: 186593
           Summary: User gesture context is not passed via MessageChannel
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Platform
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dvoytenko at google.com

To repro:
1. Open http://output.jsbin.com/cidetu
2. Click on "Channel message" button.

Observe that the popup is blocked. Also observe that clicking on "Window message" opens popup as expected.

The user gesture context is propagated via a window "message" event, but is NOT propagated via a MessageChannel event. Not sure if this is a part of any spec, but it seems counter-intuitive since MessageChannel is essentially the same API. There might be questions of whether the user gesture context should be propagated to Web Workers, etc, but as far as cross-window propagation, I believe it should.

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