Unify the API surface of all of the `WI.TimelineDataGridNode` subclasses so that they can all work nicely with the `WI.OverviewTimelineView`.
<rdar://problem/49028896>
Created attachment 365214 [details] Patch
Comment on attachment 365214 [details] Patch Attachment 365214 [details] did not pass mac-wk2-ews (mac-wk2): Output: https://webkit-queues.webkit.org/results/11570494 New failing tests: http/wpt/mediarecorder/MediaRecorder-AV-audio-video-dataavailable.html
Created attachment 365230 [details] Archive of layout-test-results from ews104 for mac-highsierra-wk2 The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews. Bot: ews104 Port: mac-highsierra-wk2 Platform: Mac OS X 10.13.6
Comment on attachment 365214 [details] Patch Clearing flags on attachment: 365214 Committed r243213: <https://trac.webkit.org/changeset/243213>
All reviewed patches have been landed. Closing bug.