Implement ScreenOrientationDelegate on ChromeOS

ash/ash.gyp

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'chromium_code': 1,
     'grit_out_dir': '<(SHARED_INTERMEDIATE_DIR)/chrome',
     # These files lists are shared with the GN build.
     'ash_sources': [
@@ skipping 302 matching lines @@
       'system/chromeos/power/power_status.cc',
       'system/chromeos/power/power_status.h',
       'system/chromeos/power/power_status_view.cc',
       'system/chromeos/power/power_status_view.h',
       'system/chromeos/power/tray_power.cc',
       'system/chromeos/power/tray_power.h',
       'system/chromeos/power/video_activity_notifier.cc',
       'system/chromeos/power/video_activity_notifier.h',
       'system/chromeos/rotation/tray_rotation_lock.cc',
       'system/chromeos/rotation/tray_rotation_lock.h',
+      'system/chromeos/screen_orientation/screen_orientation_delegate_ash.cc',
+      'system/chromeos/screen_orientation/screen_orientation_delegate_ash.h',
       'system/chromeos/screen_security/screen_capture_observer.h',
       'system/chromeos/screen_security/screen_capture_tray_item.cc',
       'system/chromeos/screen_security/screen_capture_tray_item.h',
       'system/chromeos/screen_security/screen_share_observer.h',
       'system/chromeos/screen_security/screen_share_tray_item.cc',
       'system/chromeos/screen_security/screen_share_tray_item.h',
       'system/chromeos/screen_security/screen_tray_item.cc',
       'system/chromeos/screen_security/screen_tray_item.h',
       'system/chromeos/session/last_window_closed_observer.h',
       'system/chromeos/session/last_window_closed_logout_reminder.cc',
@@ skipping 958 matching lines @@
             '../build/isolate.gypi',
           ],
           'sources': [
             'ash_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }