mash: Move //ash/system/date to //ash/common

ash/ash.gyp

Index: ash/ash.gyp
diff --git a/ash/ash.gyp b/ash/ash.gyp
index 22a97b18c6abc93e9601ba8fd01ff0e18e0a5894..bee4778ee8fc5c0ef7f1c689f1b8c729432cf9cb 100644
--- a/ash/ash.gyp
+++ b/ash/ash.gyp
@@ -94,7 +94,16 @@
       'common/shelf/wm_shelf_util.h',
       'common/shell_window_ids.cc',
       'common/shell_window_ids.h',
+      'common/system/chromeos/shutdown_policy_observer.h',
+      'common/system/chromeos/system_clock_observer.cc',
+      'common/system/chromeos/system_clock_observer.h',
       'common/system/date/clock_observer.h',
+      'common/system/date/date_default_view.cc',
+      'common/system/date/date_default_view.h',
+      'common/system/date/date_view.cc',
+      'common/system/date/date_view.h',
+      'common/system/date/tray_date.cc',
+      'common/system/date/tray_date.h',
       'common/system/networking_config_delegate.cc',
       'common/system/networking_config_delegate.h',
       'common/system/tray/actionable_view.cc',
@@ -546,8 +555,6 @@
       'system/chromeos/supervised/custodian_info_tray_observer.h',
       'system/chromeos/supervised/tray_supervised_user.cc',
       'system/chromeos/supervised/tray_supervised_user.h',
-      'system/chromeos/system_clock_observer.cc',
-      'system/chromeos/system_clock_observer.h',
       'system/chromeos/tray_caps_lock.cc',
       'system/chromeos/tray_caps_lock.h',
       'system/chromeos/tray_display.cc',
@@ -557,12 +564,6 @@
       'system/chromeos/virtual_keyboard/virtual_keyboard_observer.h',
       'system/chromeos/virtual_keyboard/virtual_keyboard_tray.cc',
       'system/chromeos/virtual_keyboard/virtual_keyboard_tray.h',
-      'system/date/date_default_view.cc',
-      'system/date/date_default_view.h',
-      'system/date/date_view.cc',
-      'system/date/date_view.h',
-      'system/date/tray_date.cc',
-      'system/date/tray_date.h',
       'system/ime/ime_observer.h',
       'system/ime/tray_ime_chromeos.cc',
       'system/ime/tray_ime_chromeos.h',
@@ -897,6 +898,7 @@
       'autoclick/autoclick_unittest.cc',
       'common/material_design/material_design_controller_unittest.cc',
       'common/shelf/shelf_model_unittest.cc',
+      'common/system/date/date_view_unittest.cc',
       'common/system/update/tray_update_unittest.cc',
       'content/display/screen_orientation_controller_chromeos_unittest.cc',
       'content/keyboard_overlay/keyboard_overlay_delegate_unittest.cc',
@@ -964,7 +966,6 @@
       'system/chromeos/session/tray_session_length_limit_unittest.cc',
       'system/chromeos/supervised/tray_supervised_user_unittest.cc',
       'system/chromeos/tray_display_unittest.cc',
-      'system/date/date_view_unittest.cc',
       'system/ime/tray_ime_chromeos_unittest.cc',
       'system/overview/overview_button_tray_unittest.cc',
       'system/toast/toast_manager_unittest.cc',