Add use-counter and WebDX feature mapping for revert.
Change-Id: I8885c31ef646470b29f9171980162f70bc4be662
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5998699
Reviewed-by: Rune Lillesveen futhark@chromium.org
Reviewed-by: Shunya Shishido sisidovski@chromium.org
Commit-Queue: Steinar H Gunderson sesse@chromium.org
Cr-Commit-Position: refs/heads/main@{#1380258}