[Webkit-unassigned] [Bug 204492] New: There should be one MicrotaskQueue per EventLoop

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=204492

            Bug ID: 204492
           Summary: There should be one MicrotaskQueue per EventLoop
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rniwa at webkit.org

HTML5 spec mandates that we should have one microtask queue per similar origin documents.
This leads to bugs like https://bugs.webkit.org/show_bug.cgi?id=199565.

In addition, MutationObserver's compound microtask queue must be per similar origin windows,
and Custom Element's backup queue must be per micro per similar origin windows.

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