[Blink>Media] Allow autoplay muted on Android by default

[Blink>Media] Allow autoplay muted on Android by default

There was a mistake causing autoplay muted is shipped on Android
but it will be disabled if the chromium embedder doesn't specify
content setting for "AllowAutoplay" preference. This CL makes the
AllowAutoplay preference true by default so that it is allowed by
embedders (including AndroidWebView) unless they explicitly
disable it.

Intent to ship:
https://groups.google.com/a/chromium.org/d/msg/blink-dev/Q1cnzNI2GpI/AL_eyUNABgAJ

BUG=689018
Review-Url: https://codereview.chromium.org/2677173002
Cr-Commit-Position: refs/heads/master@{#448423}
(cherry picked from commit faaa2fd0a05f1622d9a8806da118d4f3b602e707)

Review-Url: https://codereview.chromium.org/2681673002 .
Cr-Commit-Position: refs/branch-heads/2987@{#358}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/8751b1bef69241c66929f923ea65dbe165dd6878

[Zhiqiang Zhang (Slow), 2017-02-07 10:47:10]

Description was changed from

==========
[Blink>Media] Allow autoplay muted on Android by default

There was a mistake causing autoplay muted is shipped on Android
but it will be disabled if the chromium embedder doesn't specify
content setting for "AllowAutoplay" preference. This CL makes the
AllowAutoplay preference true by default so that it is allowed by
embedders (including AndroidWebView) unless they explicitly
disable it.

Intent to ship:
https://groups.google.com/a/chromium.org/d/msg/blink-dev/Q1cnzNI2GpI/AL_eyUNA...

BUG=689018

Review-Url: https://codereview.chromium.org/2677173002
Cr-Commit-Position: refs/heads/master@{#448423}
(cherry picked from commit faaa2fd0a05f1622d9a8806da118d4f3b602e707)
==========

to

==========
[Blink>Media] Allow autoplay muted on Android by default

There was a mistake causing autoplay muted is shipped on Android
but it will be disabled if the chromium embedder doesn't specify
content setting for "AllowAutoplay" preference. This CL makes the
AllowAutoplay preference true by default so that it is allowed by
embedders (including AndroidWebView) unless they explicitly
disable it.

Intent to ship:
https://groups.google.com/a/chromium.org/d/msg/blink-dev/Q1cnzNI2GpI/AL_eyUNA...

BUG=689018

Review-Url: https://codereview.chromium.org/2677173002
Cr-Commit-Position: refs/heads/master@{#448423}
(cherry picked from commit faaa2fd0a05f1622d9a8806da118d4f3b602e707)

Review-Url: https://codereview.chromium.org/2681673002 .
Cr-Commit-Position: refs/branch-heads/2987@{#358}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/8751b1bef69241c66929f923ea65...
==========

[Zhiqiang Zhang (Slow), 2017-02-07 10:47:11]

Committed patchset #1 (id:1) manually as
8751b1bef69241c66929f923ea65dbe165dd6878.