[Webkit-unassigned] [Bug 190240] New: Clear m_pendingTargets in MutationObserver::takeRecords

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=190240

            Bug ID: 190240
           Summary: Clear m_pendingTargets in
                    MutationObserver::takeRecords
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: HTML DOM
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: rniwa at webkit.org
                CC: cdumez at apple.com, ggaren at apple.com

https://trac.webkit.org/r236781 delayed the clearing of m_pendingTargets until the end of microtask
to avoid a race between JSMutationRecord's wrappers to be created and GC.

Cleanup this code so that we don't have to delay the clearing until the end of Microtask.

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