mash: Migrate tray audio and deps to common.

ash/ash.gyp

Index: ash/ash.gyp
diff --git a/ash/ash.gyp b/ash/ash.gyp
index f514ccf436698d001e57bbc5a13aba9c8339ee6a..20435e85cde209672af9c860f28ad6cae9cba944 100644
--- a/ash/ash.gyp
+++ b/ash/ash.gyp
@@ -64,6 +64,8 @@
       'common/ash_switches.h',
       'common/default_accessibility_delegate.cc',
       'common/default_accessibility_delegate.h',
+      'common/display/display_info.cc',
+      'common/display/display_info.h',
       'common/focus_cycler.cc',
       'common/focus_cycler.h',
       'common/keyboard/keyboard_ui.cc',
@@ -101,6 +103,12 @@
       'common/shell_window_ids.cc',
       'common/shell_window_ids.h',
       'common/system/accessibility_observer.h',
+      'common/system/audio/audio_observer.h',
+      'common/system/audio/tray_audio.cc',
+      'common/system/audio/tray_audio.h',
+      'common/system/audio/tray_audio_delegate.h',
+      'common/system/audio/volume_view.cc',
+      'common/system/audio/volume_view.h',
       'common/system/chromeos/devicetype_utils.cc',
       'common/system/chromeos/devicetype_utils.h',
       'common/system/chromeos/power/battery_notification.cc',
@@ -317,8 +325,6 @@
       'display/display_configuration_controller.h',
       'display/display_error_observer_chromeos.cc',
       'display/display_error_observer_chromeos.h',
-      'display/display_info.cc',
-      'display/display_info.h',
       'display/display_layout_store.cc',
       'display/display_layout_store.h',
       'display/display_manager.cc',
@@ -502,12 +508,6 @@
       'sticky_keys/sticky_keys_overlay.cc',
       'sticky_keys/sticky_keys_overlay.h',
       'sticky_keys/sticky_keys_state.h',
-      'system/audio/audio_observer.h',
-      'system/audio/tray_audio.cc',
-      'system/audio/tray_audio.h',
-      'system/audio/tray_audio_delegate.h',
-      'system/audio/volume_view.cc',
-      'system/audio/volume_view.h',
       'system/brightness_control_delegate.h',
       'system/cast/tray_cast.cc',
       'system/cast/tray_cast.h',
@@ -897,6 +897,7 @@
       'app_list/app_list_presenter_delegate_unittest.cc',
       'ash_touch_exploration_manager_chromeos_unittest.cc',
       'autoclick/autoclick_unittest.cc',
+      'common/display/display_info_unittest.cc',
       'common/material_design/material_design_controller_unittest.cc',
       'common/shelf/shelf_model_unittest.cc',
       'common/system/chromeos/power/power_status_unittest.cc',
@@ -915,7 +916,6 @@
       'display/display_change_observer_chromeos_unittest.cc',
       'display/display_color_manager_chromeos_unittest.cc',
       'display/display_error_observer_chromeos_unittest.cc',
-      'display/display_info_unittest.cc',
       'display/display_manager_unittest.cc',
       'display/display_util_unittest.cc',
       'display/extended_mouse_warp_controller_unittest.cc',