[For trybots test] [ScreenOrientation] Hide ScreenOrientationProvider inside WebContentsImpl.

[ScreenOrientation] Hide ScreenOrientationProvider inside WebContentsImpl.

BUG=678545
TEST=content_unittests

[ScreenOrientation] Merge ScreenOrientation into ScreenOrientationProvider.

ScreenOrientation has no actual functionality other than forwarding
lock/unlock requests to ScreenOrientationProvider, so this CL
merges it into ScreenOrientationProvider and removes it.

This CL also removes declarition of
content::RenderFrameHostDelegate::GetScreenOrientationProvider() because
no codes expect RenderFrameHostDelegate has such a method.

BUG=678545
TEST=content_unittests
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation

patch from issue 2649823002 at patchset 160001 (http://crrev.com/2649823002#ps160001)

[leonhsl(Using Gerrit), 2017-02-07 08:48:42]

The CQ bit was checked by leon.han@intel.com to run a CQ dry run

[commit-bot: I haz the power, 2017-02-07 08:49:07]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[leonhsl(Using Gerrit), 2017-02-07 08:57:39]

Description was changed from

==========
[ScreenOrientation] Hide ScreenOrientationProvider inside WebContentsImpl.

BUG=678545
TEST=content_unittests

This CL depends on:

[ScreenOrientation] Merge ScreenOrientation into ScreenOrientationProvider.

ScreenOrientation has no actual functionality other than forwarding
lock/unlock requests to ScreenOrientationProvider, so this CL
merges it into ScreenOrientationProvider and removes it.

This CL also removes declarition of
content::RenderFrameHostDelegate::GetScreenOrientationProvider() because
no codes expect RenderFrameHostDelegate has such a method.

BUG=678545
TEST=content_unittests
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation

patch from issue 2649823002 at patchset 160001
(http://crrev.com/2649823002#ps160001)
==========

to

==========
[ScreenOrientation] Hide ScreenOrientationProvider inside WebContentsImpl.

BUG=678545
TEST=content_unittests

[ScreenOrientation] Merge ScreenOrientation into ScreenOrientationProvider.

ScreenOrientation has no actual functionality other than forwarding
lock/unlock requests to ScreenOrientationProvider, so this CL
merges it into ScreenOrientationProvider and removes it.

This CL also removes declarition of
content::RenderFrameHostDelegate::GetScreenOrientationProvider() because
no codes expect RenderFrameHostDelegate has such a method.

BUG=678545
TEST=content_unittests
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation

patch from issue 2649823002 at patchset 160001
(http://crrev.com/2649823002#ps160001)
==========

[commit-bot: I haz the power, 2017-02-07 09:16:53]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-02-07 09:16:54]

Dry run: Try jobs failed on following builders:
  cast_shell_android on master.tryserver.chromium.android (JOB_FAILED,
https://build.chromium.org/p/tryserver.chromium.android/builders/cast_shell_a...)

[leonhsl(Using Gerrit), 2017-02-07 09:27:12]

The CQ bit was checked by leon.han@intel.com to run a CQ dry run

[commit-bot: I haz the power, 2017-02-07 09:27:27]

Dry run: 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, 2017-02-07 10:40:29]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-02-07 10:40:30]

Dry run: This issue passed the CQ dry run.