mash: Move system tray cast code into //ash/common

ash/ash.gyp

Index: ash/ash.gyp
diff --git a/ash/ash.gyp b/ash/ash.gyp
index 462365bbbca8f195ec7dbdd0434b774c91bf3a5a..8931f2f0c48be06f2d3b3e44783263224ec36994 100644
--- a/ash/ash.gyp
+++ b/ash/ash.gyp
@@ -52,8 +52,6 @@
       'autoclick/autoclick_controller.h',
       'cancel_mode.cc',
       'cancel_mode.h',
-      'cast_config_delegate.cc',
-      'cast_config_delegate.h',
       'common/accessibility_delegate.h',
       'common/accessibility_types.h',
       'common/ash_constants.cc',
@@ -62,6 +60,8 @@
       'common/ash_layout_constants.h',
       'common/ash_switches.cc',
       'common/ash_switches.h',
+      'common/cast_config_delegate.cc',
+      'common/cast_config_delegate.h',
       'common/default_accessibility_delegate.cc',
       'common/default_accessibility_delegate.h',
       'common/display/display_info.cc',
@@ -109,6 +109,8 @@
       'common/system/audio/tray_audio_delegate.h',
       'common/system/audio/volume_view.cc',
       'common/system/audio/volume_view.h',
+      'common/system/cast/tray_cast.cc',
+      'common/system/cast/tray_cast.h',
       'common/system/chromeos/bluetooth/bluetooth_observer.h',
       'common/system/chromeos/devicetype_utils.cc',
       'common/system/chromeos/devicetype_utils.h',
@@ -127,7 +129,13 @@
       'common/system/chromeos/power/tray_power.cc',
       'common/system/chromeos/power/tray_power.h',
       'common/system/chromeos/screen_security/screen_capture_observer.h',
+      'common/system/chromeos/screen_security/screen_capture_tray_item.cc',
+      'common/system/chromeos/screen_security/screen_capture_tray_item.h',
       'common/system/chromeos/screen_security/screen_share_observer.h',
+      'common/system/chromeos/screen_security/screen_share_tray_item.cc',
+      'common/system/chromeos/screen_security/screen_share_tray_item.h',
+      'common/system/chromeos/screen_security/screen_tray_item.cc',
+      'common/system/chromeos/screen_security/screen_tray_item.h',
       'common/system/chromeos/session/last_window_closed_observer.h',
       'common/system/chromeos/session/logout_button_observer.h',
       'common/system/chromeos/session/logout_button_tray.cc',
@@ -562,8 +570,6 @@
       'sticky_keys/sticky_keys_overlay.h',
       'sticky_keys/sticky_keys_state.h',
       'system/brightness_control_delegate.h',
-      'system/cast/tray_cast.cc',
-      'system/cast/tray_cast.h',
       'system/chromeos/audio/audio_detailed_view.cc',
       'system/chromeos/audio/audio_detailed_view.h',
       'system/chromeos/audio/tray_audio_chromeos.cc',
@@ -607,12 +613,6 @@
       'system/chromeos/power/video_activity_notifier.h',
       'system/chromeos/rotation/tray_rotation_lock.cc',
       'system/chromeos/rotation/tray_rotation_lock.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_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/supervised/custodian_info_tray_observer.h',
       'system/chromeos/supervised/tray_supervised_user.cc',
       'system/chromeos/supervised/tray_supervised_user.h',
@@ -903,6 +903,7 @@
       'common/system/chromeos/power/power_status_unittest.cc',
       'common/system/chromeos/power/power_status_view_unittest.cc',
       'common/system/chromeos/power/tray_power_unittest.cc',
+      'common/system/chromeos/screen_security/screen_tray_item_unittest.cc',
       'common/system/chromeos/session/logout_confirmation_controller_unittest.cc',
       'common/system/chromeos/session/tray_session_length_limit_unittest.cc',
       'common/system/date/date_view_unittest.cc',
@@ -967,7 +968,6 @@
       'system/chromeos/multi_user/user_switch_util_unittest.cc',
       'system/chromeos/power/power_event_observer_unittest.cc',
       'system/chromeos/rotation/tray_rotation_lock_unittest.cc',
-      'system/chromeos/screen_security/screen_tray_item_unittest.cc',
       'system/chromeos/supervised/tray_supervised_user_unittest.cc',
       'system/chromeos/tray_display_unittest.cc',
       'system/overview/overview_button_tray_unittest.cc',