Allow arc app to lock screen orientation in TouchView/Tablet mode

Allow arc app to lock screen orientation in TouchView/Tablet mode

mojo change:
* Added orientation lock parameter to AppInfo
* Added OnTaskOrientationLockRequested method on AppHost

c++ change:
* Apply orientation lock to arc windows upon Tablet mode entry
* Unset lock and set the rotation back upon Tablet mode exit.
* Apply the rotation lock when a task requested. This is kept only on memory and does not persist.

BUG=626445
,b/28341028
TEST=ChromeLauncherControllerImplTest.ArcOrientatinoLock

Review-Url: https://codereview.chromium.org/2112013002
Cr-Commit-Position: refs/heads/master@{#404244}
(cherry picked from commit 342f3485150be7e10404671e811d9c881f8b62ea)

Committed: https://chromium.googlesource.com/chromium/src/+/41c090842fe6ec0a457cb92998336f2884b6e5c2

[oshima, 2016-07-11 22:07:59]

Description was changed from

==========
Allow arc app to lock screen orientation in TouchView/Tablet mode

mojo change:
* Added orientation lock parameter to AppInfo
* Added OnTaskOrientationLockRequested method on AppHost

c++ change:
* Apply orientation lock to arc windows upon Tablet mode entry
* Unset lock and set the rotation back upon Tablet mode exit.
* Apply the rotation lock when a task requested. This is kept only on memory and
does not persist.

BUG=626445,b/28341028
TEST=ChromeLauncherControllerImplTest.ArcOrientatinoLock

Review-Url: https://codereview.chromium.org/2112013002
Cr-Commit-Position: refs/heads/master@{#404244}
(cherry picked from commit 342f3485150be7e10404671e811d9c881f8b62ea)
==========

to

==========
Allow arc app to lock screen orientation in TouchView/Tablet mode

mojo change:
* Added orientation lock parameter to AppInfo
* Added OnTaskOrientationLockRequested method on AppHost

c++ change:
* Apply orientation lock to arc windows upon Tablet mode entry
* Unset lock and set the rotation back upon Tablet mode exit.
* Apply the rotation lock when a task requested. This is kept only on memory and
does not persist.

BUG=626445,b/28341028
TEST=ChromeLauncherControllerImplTest.ArcOrientatinoLock

Review-Url: https://codereview.chromium.org/2112013002
Cr-Commit-Position: refs/heads/master@{#404244}
(cherry picked from commit 342f3485150be7e10404671e811d9c881f8b62ea)

Committed:
https://chromium.googlesource.com/chromium/src/+/41c090842fe6ec0a457cb9299833...
==========

[oshima, 2016-07-11 22:08:01]

Committed patchset #1 (id:1) manually as
41c090842fe6ec0a457cb92998336f2884b6e5c2.