[Blink>Media] Add Chrome feature for disabling autoplay unmuted in WebAPK

[Blink>Media] Add Chrome feature for disabling autoplay unmuted in WebAPK

This CL adds a Chrome feature for disabling autoplay unmuted in WebAPK,
in case if we need to disable the feature via Finch.

BUG=676312
Review-Url: https://codereview.chromium.org/2698253002
Cr-Commit-Position: refs/heads/master@{#450982}
Committed: https://chromium.googlesource.com/chromium/src/+/89e4e76885c3ba68394bb8ef2f58098a0ebe530d

[Zhiqiang Zhang (Slow), 2017-02-16 14:20:16]

zqzhang@chromium.org changed reviewers:
+ avayvod@chromium.org

[whywhat, 2017-02-16 14:35:39]

lgtm

[Zhiqiang Zhang (Slow), 2017-02-16 14:36:20]

The CQ bit was checked by zqzhang@chromium.org

[commit-bot: I haz the power, 2017-02-16 14:36:43]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-16 16:15:42]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487255780848320, "parent_rev":
"74b6455bacd6648d765d251d486b2e5cfba60eb1", "commit_rev":
"89e4e76885c3ba68394bb8ef2f58098a0ebe530d"}

[commit-bot: I haz the power, 2017-02-16 16:16:22]

Description was changed from

==========
[Blink>Media] Add Chrome feature for disabling autoplay unmuted in WebAPK

This CL adds a Chrome feature for disabling autoplay unmuted in WebAPK,
in case if we need to disable the feature via Finch.

BUG=676312
==========

to

==========
[Blink>Media] Add Chrome feature for disabling autoplay unmuted in WebAPK

This CL adds a Chrome feature for disabling autoplay unmuted in WebAPK,
in case if we need to disable the feature via Finch.

BUG=676312

Review-Url: https://codereview.chromium.org/2698253002
Cr-Commit-Position: refs/heads/master@{#450982}
Committed:
https://chromium.googlesource.com/chromium/src/+/89e4e76885c3ba68394bb8ef2f58...
==========

[commit-bot: I haz the power, 2017-02-16 16:16:23]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/89e4e76885c3ba68394bb8ef2f58...