willBeRemovedFromTree is called conditionally, relying on unregistering objects in there is highly error prone.
<rdar://problem/34796065>
<rdar://problem/34796100>
Created attachment 322560 [details] Patch
The commit-queue encountered the following flaky tests while processing attachment 322560 [details]: The commit-queue is continuing to process your patch.
Comment on attachment 322560 [details] Patch Clearing flags on attachment: 322560 Committed r222823: <http://trac.webkit.org/changeset/222823>
All reviewed patches have been landed. Closing bug.