The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/585d547c6e638f09881a4ae464e8f10cc153bbba

commit 585d547c6e638f09881a4ae464e8f10cc153bbba
Author: Becca Hughes <beccahughes@chromium.org>
Date: Wed Aug 23 11:41:19 2017

Media Engagement: have different threshold value for autoplay

When a website is allowed to autoplay because of media engagement, we
should not prevent autoplay when the media engagement index goes below
the threshold to avoid websites oscillating around it.

BUG= 746948 

Change-Id: Ibe3e51e30641dd5b676c2d35262a74aa52cc695f
Reviewed-on: https://chromium-review.googlesource.com/603309
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#496655}
[modify] https://crrev.com/585d547c6e638f09881a4ae464e8f10cc153bbba/chrome/browser/media/media_engagement_autoplay_browsertest.cc
[modify] https://crrev.com/585d547c6e638f09881a4ae464e8f10cc153bbba/chrome/browser/media/media_engagement_contents_observer.cc
[modify] https://crrev.com/585d547c6e638f09881a4ae464e8f10cc153bbba/chrome/browser/media/media_engagement_score.cc
[modify] https://crrev.com/585d547c6e638f09881a4ae464e8f10cc153bbba/chrome/browser/media/media_engagement_score.h
[modify] https://crrev.com/585d547c6e638f09881a4ae464e8f10cc153bbba/chrome/browser/media/media_engagement_score_unittest.cc
[modify] https://crrev.com/585d547c6e638f09881a4ae464e8f10cc153bbba/chrome/browser/media/media_engagement_service.cc
[modify] https://crrev.com/585d547c6e638f09881a4ae464e8f10cc153bbba/chrome/browser/media/media_engagement_service.h
[modify] https://crrev.com/585d547c6e638f09881a4ae464e8f10cc153bbba/chrome/browser/media/media_engagement_service_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ae419bbed497aacbd2b2d93842118eb0d49f9ebe

commit ae419bbed497aacbd2b2d93842118eb0d49f9ebe
Author: Becca Hughes <beccahughes@chromium.org>
Date: Fri Aug 25 10:56:43 2017

Media Engagement: Add "Is High" column to Media Engagement WebUI

As part of the threshold work we need to be able to see which
origins are considered high or not. This adds a "is high" column
to chrome://media-engagement.

BUG= 746948 

Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Ib3be4e27fb34d9d4cd0f7b648af124c453267422
Reviewed-on: https://chromium-review.googlesource.com/605208
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#497373}
[modify] https://crrev.com/ae419bbed497aacbd2b2d93842118eb0d49f9ebe/chrome/browser/media/media_engagement_score.cc
[modify] https://crrev.com/ae419bbed497aacbd2b2d93842118eb0d49f9ebe/chrome/browser/media/media_engagement_score_details.mojom
[modify] https://crrev.com/ae419bbed497aacbd2b2d93842118eb0d49f9ebe/chrome/browser/resources/media/media_engagement.html
[modify] https://crrev.com/ae419bbed497aacbd2b2d93842118eb0d49f9ebe/chrome/browser/resources/media/media_engagement.js

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/15a57a6bc51143ccbb44711bfdf2338701b4b4bd

commit 15a57a6bc51143ccbb44711bfdf2338701b4b4bd
Author: Becca Hughes <beccahughes@chromium.org>
Date: Fri Aug 25 20:11:18 2017

Media Engagement: Add Engagement.IsHigh to UKM.

With the addition of bucketing, it would be useful
to know which scores are considered high by the
MEI service. Adding a field to UKM to do this.

BUG= 746948 

Change-Id: I12801566e18ee001b04a557e7ba93d4a82ea12a4
Reviewed-on: https://chromium-review.googlesource.com/635263
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#497512}
[modify] https://crrev.com/15a57a6bc51143ccbb44711bfdf2338701b4b4bd/chrome/browser/media/media_engagement_contents_observer.cc
[modify] https://crrev.com/15a57a6bc51143ccbb44711bfdf2338701b4b4bd/chrome/browser/media/media_engagement_contents_observer_unittest.cc
[modify] https://crrev.com/15a57a6bc51143ccbb44711bfdf2338701b4b4bd/tools/metrics/ukm/ukm.xml