The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e06e83a8e6999472d4b9d6efa8ccc3b79ca8c9b7

commit e06e83a8e6999472d4b9d6efa8ccc3b79ca8c9b7
Author: Becca Hughes <beccahughes@chromium.org>
Date: Tue Jul 04 16:28:17 2017

Add a MediaEngagementScore class to manage storing the score.

Add a MediaEngagementScore class that manages calculating the total
score as well as storing/reading the score for an origin from the
content settings store. Register the setting to be synced across
devices.

BUG= 731750 

Change-Id: I30e1ceb815c252d5f0395a8d10b905e7a6c9914b
Reviewed-on: https://chromium-review.googlesource.com/529087
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Reviewed-by: Raymes Khoury <raymes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#484127}
[modify] https://crrev.com/e06e83a8e6999472d4b9d6efa8ccc3b79ca8c9b7/chrome/browser/BUILD.gn
[add] https://crrev.com/e06e83a8e6999472d4b9d6efa8ccc3b79ca8c9b7/chrome/browser/media/media_engagement_score.cc
[add] https://crrev.com/e06e83a8e6999472d4b9d6efa8ccc3b79ca8c9b7/chrome/browser/media/media_engagement_score.h
[add] https://crrev.com/e06e83a8e6999472d4b9d6efa8ccc3b79ca8c9b7/chrome/browser/media/media_engagement_score_unittest.cc
[modify] https://crrev.com/e06e83a8e6999472d4b9d6efa8ccc3b79ca8c9b7/chrome/test/BUILD.gn
[modify] https://crrev.com/e06e83a8e6999472d4b9d6efa8ccc3b79ca8c9b7/components/content_settings/core/browser/website_settings_registry.cc
[modify] https://crrev.com/e06e83a8e6999472d4b9d6efa8ccc3b79ca8c9b7/components/content_settings/core/common/content_settings_types.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/76fd7567ab2517e5a3549b5ed172bc1986c74af5

commit 76fd7567ab2517e5a3549b5ed172bc1986c74af5
Author: Becca Hughes <beccahughes@chromium.org>
Date: Thu Jul 06 09:52:15 2017

Media Engagement: Make the service store scores.

Make the MediaEngagementService store scores in the context store
when the MediaEngagementContentObserver detects a visit or playback
of significant media.

BUG= 731750 

Change-Id: Iae584df3b644c5c4d6d5ea3b53105045746dcc00
Reviewed-on: https://chromium-review.googlesource.com/538774
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#484519}
[modify] https://crrev.com/76fd7567ab2517e5a3549b5ed172bc1986c74af5/chrome/browser/media/media_engagement_contents_observer.cc
[modify] https://crrev.com/76fd7567ab2517e5a3549b5ed172bc1986c74af5/chrome/browser/media/media_engagement_contents_observer_unittest.cc
[modify] https://crrev.com/76fd7567ab2517e5a3549b5ed172bc1986c74af5/chrome/browser/media/media_engagement_score.cc
[modify] https://crrev.com/76fd7567ab2517e5a3549b5ed172bc1986c74af5/chrome/browser/media/media_engagement_service.cc
[modify] https://crrev.com/76fd7567ab2517e5a3549b5ed172bc1986c74af5/chrome/browser/media/media_engagement_service.h
[modify] https://crrev.com/76fd7567ab2517e5a3549b5ed172bc1986c74af5/chrome/browser/media/media_engagement_service_factory.cc
[add] https://crrev.com/76fd7567ab2517e5a3549b5ed172bc1986c74af5/chrome/browser/media/media_engagement_service_unittest.cc
[modify] https://crrev.com/76fd7567ab2517e5a3549b5ed172bc1986c74af5/chrome/test/BUILD.gn

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8f6ba357c883b6d4261b85dfcc0bf1c69cb46a05

commit 8f6ba357c883b6d4261b85dfcc0bf1c69cb46a05
Author: Becca Hughes <beccahughes@chromium.org>
Date: Tue Jul 11 12:08:01 2017

Media Engagement: Fix muted status propagation and timer bug.

The playbacks were not be recoreded correctly because muted state
was not propagating through to the WebContentsObserver correctly.
There was also a bug where the timer didn't have the time-delta
set correctly so it was never being called.

BUG= 731750 

Change-Id: I2944679adbb88b9f37c1a88efa97652ff032d9b1
Reviewed-on: https://chromium-review.googlesource.com/563668
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Cr-Commit-Position: refs/heads/master@{#485599}
[modify] https://crrev.com/8f6ba357c883b6d4261b85dfcc0bf1c69cb46a05/chrome/browser/media/media_engagement_contents_observer.cc
[modify] https://crrev.com/8f6ba357c883b6d4261b85dfcc0bf1c69cb46a05/chrome/browser/media/media_engagement_contents_observer.h
[modify] https://crrev.com/8f6ba357c883b6d4261b85dfcc0bf1c69cb46a05/chrome/browser/media/media_engagement_contents_observer_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/05ac3dfe945c3b9bf3b823edd3535c4560223a16

commit 05ac3dfe945c3b9bf3b823edd3535c4560223a16
Author: Becca Hughes <beccahughes@chromium.org>
Date: Tue Jul 11 18:20:54 2017

Media Engagement: Remove DidFinishNavigation dcheck

There is a DCHECK that checks if the timer is running when
DidFinishNavigation is called. When running in Chrome this crashes
the browser as it seems that the MediaStoppedPlaying calls are
not being called before the navigation event.

Bug:  731750 
Change-Id: Ia089a1c267735e6f9dba1d271c5114c1a19d3e41
Reviewed-on: https://chromium-review.googlesource.com/567151
Reviewed-by: Mounir Lamouri <mlamouri@chromium.org>
Commit-Queue: Becca Hughes <beccahughes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#485680}
[modify] https://crrev.com/05ac3dfe945c3b9bf3b823edd3535c4560223a16/chrome/browser/media/media_engagement_contents_observer.cc
[modify] https://crrev.com/05ac3dfe945c3b9bf3b823edd3535c4560223a16/chrome/browser/media/media_engagement_contents_observer_unittest.cc