[Webkit-unassigned] [Bug 200819] New: [ContentChangeObserver] Add ContentChangeObserver::elementDidBecomeHidden

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=200819

            Bug ID: 200819
           Summary: [ContentChangeObserver] Add
                    ContentChangeObserver::elementDidBecomeHidden
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: zalan at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

to track visible->hidden candidate elements.

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