The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2e274a5ce75fbb18f5a1b877481ebc3cbdd3fcf4

commit 2e274a5ce75fbb18f5a1b877481ebc3cbdd3fcf4
Author: Jazz Xu <jazzhsu@chromium.org>
Date: Fri Nov 02 18:36:21 2018

[Media Controls] Record user metric action for click-anywhere to play/pause

Bug:  896255 
Change-Id: I12f394272b9bec2f11ccfaf850ef03fffa8e484c
Reviewed-on: https://chromium-review.googlesource.com/c/1313560
Reviewed-by: Tommy Steimel <steimel@chromium.org>
Reviewed-by: Jesse Doherty <jwd@chromium.org>
Commit-Queue: Jazz Xu <jazzhsu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604993}
[modify] https://crrev.com/2e274a5ce75fbb18f5a1b877481ebc3cbdd3fcf4/third_party/blink/renderer/modules/media_controls/media_controls_impl.cc
[modify] https://crrev.com/2e274a5ce75fbb18f5a1b877481ebc3cbdd3fcf4/tools/metrics/actions/actions.xml