media: Add a web preference to enable encrypted media

media: Add a web preference to enable encrypted media

Add a WebPreference encrypted_media_enabled. If it's set to false, all requestMediaKeySystemAccess() calls will return a rejected promise with NotSupportedError.

Also connect |encrypted_media_enabled| with a new Chrome preference kWebKitEncryptedMediaEnabled and make sure when user changes that preference, the Web preference in the renderer process will get updated.

Note that the check is only done in requestMediaKeySystemAccess(). So if a user disabled the preference after a protected content playback already started, the playback session will not be affected. However, all newer protected content playback attempt will fail.

NOTRY=true
NOPRESUBMIT=true
TBR=tommycli@chromium.org,jam@chromium.org,dcheng@chromium.org,jrummell@chromium.org
BUG=689778
TEST=Manually tested.

Review-Url: https://codereview.chromium.org/2676633006
Cr-Commit-Position: refs/heads/master@{#449048}
(cherry picked from commit d252d7b55af16f3edbb90d1132cf6ff360f7d11f)

Review-Url: https://codereview.chromium.org/2681383003
Cr-Commit-Position: refs/branch-heads/2987@{#412}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/60a11504bbae8e3ed2a790668bf7da6e5f1c353b

[xhwang, 2017-02-09 19:19:25]

The CQ bit was checked by xhwang@chromium.org

[commit-bot: I haz the power, 2017-02-09 19:20:02]

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, 2017-02-09 19:21:35]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1486667965111180, "parent_rev":
"322486c1cd367137f0063b89ecd2aaf91a175c97", "commit_rev":
"60a11504bbae8e3ed2a790668bf7da6e5f1c353b"}

[commit-bot: I haz the power, 2017-02-09 19:22:11]

Description was changed from

==========
media: Add a web preference to enable encrypted media

Add a WebPreference encrypted_media_enabled. If it's set to false, all
requestMediaKeySystemAccess() calls will return a rejected promise with
NotSupportedError.

Also connect |encrypted_media_enabled| with a new Chrome preference
kWebKitEncryptedMediaEnabled and make sure when user changes that preference,
the Web preference in the renderer process will get updated.

Note that the check is only done in requestMediaKeySystemAccess(). So if a user
disabled the preference after a protected content playback already started, the
playback session will not be affected. However, all newer protected content
playback attempt will fail.

NOTRY=true
NOPRESUBMIT=true
TBR=tommycli@chromium.org,jam@chromium.org,dcheng@chromium.org,jrummell@chrom...
BUG=689778
TEST=Manually tested.

Review-Url: https://codereview.chromium.org/2676633006
Cr-Commit-Position: refs/heads/master@{#449048}
(cherry picked from commit d252d7b55af16f3edbb90d1132cf6ff360f7d11f)
==========

to

==========
media: Add a web preference to enable encrypted media

Add a WebPreference encrypted_media_enabled. If it's set to false, all
requestMediaKeySystemAccess() calls will return a rejected promise with
NotSupportedError.

Also connect |encrypted_media_enabled| with a new Chrome preference
kWebKitEncryptedMediaEnabled and make sure when user changes that preference,
the Web preference in the renderer process will get updated.

Note that the check is only done in requestMediaKeySystemAccess(). So if a user
disabled the preference after a protected content playback already started, the
playback session will not be affected. However, all newer protected content
playback attempt will fail.

NOTRY=true
NOPRESUBMIT=true
TBR=tommycli@chromium.org,jam@chromium.org,dcheng@chromium.org,jrummell@chrom...
BUG=689778
TEST=Manually tested.

Review-Url: https://codereview.chromium.org/2676633006
Cr-Commit-Position: refs/heads/master@{#449048}
(cherry picked from commit d252d7b55af16f3edbb90d1132cf6ff360f7d11f)

Review-Url: https://codereview.chromium.org/2681383003
Cr-Commit-Position: refs/branch-heads/2987@{#412}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/60a11504bbae8e3ed2a790668bf7...
==========

[commit-bot: I haz the power, 2017-02-09 19:22:12]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/60a11504bbae8e3ed2a790668bf7...