Update status of Resize Observer to "Supported In Preview"
Created attachment 388260 [details] Patch
Style checker issue isn't due to this patch, but I can fix it if needed.
The commit-queue encountered the following flaky tests while processing attachment 388260 [details]: editing/spelling/spellcheck-async-remove-frame.html bug 158401 (authors: morrita@google.com, rniwa@webkit.org, and tony@chromium.org) The commit-queue is continuing to process your patch.
Comment on attachment 388260 [details] Patch Clearing flags on attachment: 388260 Committed r254840: <https://trac.webkit.org/changeset/254840>
All reviewed patches have been landed. Closing bug.
<rdar://problem/58746260>