[Webkit-unassigned] [Bug 150358] Support for promise rejection events (unhandledrejection)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=150358

--- Comment #6 from Joseph Pecoraro <joepeck at webkit.org> ---
Created attachment 295505
  --> https://bugs.webkit.org/attachment.cgi?id=295505&action=review
[PATCH] Work in Progress

I haven't written tests or updated LayoutTests, but this was a preliminary attempt that looked good in my most basic tests. A few things that need to be handled:

    - PromiseRejectionEvent
      - when constructed with a value for "promise" that is not an instance of a Promise we should wrap it in a Promise (Blink does this)
        - new PromiseRejectionEvent("event-name", {promise:1}) => should be as if {promise: Promise.resolve(1)}

    - Layout Tests
      - update existing
      - write new tests covering the Event and event handlers

    - Web Inspector support (probably a follow-up bug)
      - pause on unhandled rejection
      - if log errors for unhandled rejections then later suppress these errors when the promise does get handled ("revoke")

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