[Media Router] Remove MR FeatureSwitch's dependency on EAR.

[Media Router] Remove MR FeatureSwitch's dependency on EAR.

The ExtensionActionRedesign field trial	expires after M51, and the
feature is already enabled by default. We should remove MR's dependency
on it.

Also, remove media_router_with_cast_extension FeatureSwitch as it's no
longer used.

BUG=613252
Committed: https://crrev.com/9013e165f40d23f8fd28424f157fa4bb3805d018
Cr-Commit-Position: refs/heads/master@{#395165}

[imcheng, 2016-05-19 18:54:55]

imcheng@chromium.org changed reviewers:
+ rdevlin.cronin@chromium.org

[imcheng, 2016-05-19 18:54:56]

Devlin: PTAL. I left the option to specify multiple field trials in the code,
but if you feel it's likely nobody will be using it in the near future, then I
can remove that as well.

[Devlin, 2016-05-19 20:50:26]

On 2016/05/19 18:54:56, imcheng wrote:
> Devlin: PTAL. I left the option to specify multiple field trials in the code,
> but if you feel it's likely nobody will be using it in the near future, then I
> can remove that as well.

Let's take out the multiple field trials.  I don't think we want to encourage
it, and it's not actively used.  If someone needs it again, we can always add it
back. :)

[imcheng, 2016-05-19 21:47:53]

On 2016/05/19 20:50:26, Devlin wrote:
> On 2016/05/19 18:54:56, imcheng wrote:
> > Devlin: PTAL. I left the option to specify multiple field trials in the
code,
> > but if you feel it's likely nobody will be using it in the near future, then
I
> > can remove that as well.
> 
> Let's take out the multiple field trials.  I don't think we want to encourage
> it, and it's not actively used.  If someone needs it again, we can always add
it
> back. :)

Done.

[Devlin, 2016-05-20 20:03:14]

lgtm

[imcheng, 2016-05-20 20:06:50]

The CQ bit was checked by imcheng@chromium.org

[commit-bot: I haz the power, 2016-05-20 20:07:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1996123002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1996123002/20001

[commit-bot: I haz the power, 2016-05-20 21:09:00]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-05-20 21:10:34]

Description was changed from

==========
[Media Router] Remove MR FeatureSwitch's dependency on EAR.

The ExtensionActionRedesign field trial	expires after M51, and the
feature is already enabled by default. We should remove MR's dependency
on it.

Also, remove media_router_with_cast_extension FeatureSwitch as it's no
longer used.

BUG=613252
==========

to

==========
[Media Router] Remove MR FeatureSwitch's dependency on EAR.

The ExtensionActionRedesign field trial	expires after M51, and the
feature is already enabled by default. We should remove MR's dependency
on it.

Also, remove media_router_with_cast_extension FeatureSwitch as it's no
longer used.

BUG=613252

Committed: https://crrev.com/9013e165f40d23f8fd28424f157fa4bb3805d018
Cr-Commit-Position: refs/heads/master@{#395165}
==========

[commit-bot: I haz the power, 2016-05-20 21:10:35]

Patchset 2 (id:??) landed as
https://crrev.com/9013e165f40d23f8fd28424f157fa4bb3805d018
Cr-Commit-Position: refs/heads/master@{#395165}