Add support for MediaPermissionDispatcher to use other permission types.

Add support for MediaPermissionDispatcher to use other permission types.

MediaPermissionDispatcher becomes the common way for renderer process to query permission status through mojo services.

BUG=520101
Committed: https://crrev.com/0323f04c1ddfb1d2a046dfed7a902c351e65180a
Cr-Commit-Position: refs/heads/master@{#346797}

[guoweis_left_chromium, 2015-08-28 00:08:22]

guoweis@chromium.org changed reviewers:
+ xhwang@chromium.org

[guoweis_left_chromium, 2015-08-28 00:08:22]

PTAL.

[xhwang, 2015-08-28 05:08:41]

Looking good % one nit. But let's get the naming right first.

https://codereview.chromium.org/1314923007/diff/1/content/renderer/media/medi...
File content/renderer/media/media_permission_dispatcher.cc (right):

https://codereview.chromium.org/1314923007/diff/1/content/renderer/media/medi...
content/renderer/media/media_permission_dispatcher.cc:29: }
remove "default" and move l.27-28 out of the "switch" block. This way, the
compiler can help catch the case if we didn't handle all the Types.

[guoweis_left_chromium, 2015-09-01 15:13:45]

PTAL.

[guoweis_left_chromium, 2015-09-01 19:16:44]

guoweis@chromium.org changed reviewers:
- xhwang@chromium.org

[guoweis_left_chromium, 2015-09-01 19:45:54]

guoweis@chromium.org changed reviewers:
+ ddorwin@chromium.org

[guoweis_left_chromium, 2015-09-01 19:45:55]

ddorwin@chromium.org: PTAL. This is based on
https://codereview.chromium.org/1311783007/

[guoweis_left_chromium, 2015-09-01 20:47:34]

guoweis@chromium.org changed reviewers:
- ddorwin@chromium.org

[guoweis_left_chromium, 2015-09-01 20:48:18]

guoweis@chromium.org changed reviewers:
+ ddorwin@chromium.org

[guoweis_left_chromium, 2015-09-01 20:48:19]

David, Can you still look at this one since this is just a plain refatoring? 

Thanks,
Guowei

[ddorwin, 2015-09-01 22:24:57]

lgtm

[guoweis_left_chromium, 2015-09-01 23:20:43]

The CQ bit was checked by guoweis@chromium.org

[commit-bot: I haz the power, 2015-09-01 23:21:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1314923007/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1314923007/40001

[commit-bot: I haz the power, 2015-09-02 00:25:44]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-09-02 00:26:13]

Patchset 3 (id:??) landed as
https://crrev.com/0323f04c1ddfb1d2a046dfed7a902c351e65180a
Cr-Commit-Position: refs/heads/master@{#346797}