Use mojo SystemTray interfaces for both mash and classic ash

ash/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
 
 assert(use_aura)
@@ skipping 98 matching lines @@
     "common/keyboard/keyboard_ui.cc",
     "common/keyboard/keyboard_ui.h",
     "common/keyboard/keyboard_ui_observer.h",
     "common/login_status.h",
     "common/material_design/material_design_controller.cc",
     "common/material_design/material_design_controller.h",
     "common/metrics/gesture_action_type.h",
     "common/metrics/pointer_metrics_recorder.cc",
     "common/metrics/pointer_metrics_recorder.h",
     "common/metrics/user_metrics_action.h",
+    "common/mojo_interface_factory.cc",
+    "common/mojo_interface_factory.h",
     "common/multi_profile_uma.cc",
     "common/multi_profile_uma.h",
     "common/palette_delegate.h",
     "common/popup_message.cc",
     "common/popup_message.h",
     "common/scoped_root_window_for_new_windows.cc",
     "common/scoped_root_window_for_new_windows.h",
     "common/session/session_state_delegate.cc",
     "common/session/session_state_delegate.h",
     "common/session/session_state_observer.cc",
@@ skipping 221 matching lines @@
     "common/system/tray/label_tray_view.cc",
     "common/system/tray/label_tray_view.h",
     "common/system/tray/special_popup_row.cc",
     "common/system/tray/special_popup_row.h",
     "common/system/tray/system_menu_button.cc",
     "common/system/tray/system_menu_button.h",
     "common/system/tray/system_tray.cc",
     "common/system/tray/system_tray.h",
     "common/system/tray/system_tray_bubble.cc",
     "common/system/tray/system_tray_bubble.h",
+    "common/system/tray/system_tray_controller.cc",
+    "common/system/tray/system_tray_controller.h",
     "common/system/tray/system_tray_delegate.cc",
     "common/system/tray/system_tray_delegate.h",
     "common/system/tray/system_tray_item.cc",
     "common/system/tray/system_tray_item.h",
     "common/system/tray/system_tray_notifier.cc",
     "common/system/tray/system_tray_notifier.h",
     "common/system/tray/throbber_view.cc",
     "common/system/tray/throbber_view.h",
     "common/system/tray/tray_background_view.cc",
     "common/system/tray/tray_background_view.h",
@@ skipping 447 matching lines @@
 
   public_deps = [
     "//ash/common/strings",
     "//ash/resources",
     "//ash/resources/vector_icons",
     "//ash/shared:app_types",
   ]
   deps = [
     "//ash/autoclick/common:autoclick",
     "//ash/public/cpp",
+    "//ash/public/interfaces",
     "//ash/touch_hud",
     "//base",
     "//base:i18n",
     "//base/third_party/dynamic_annotations",
     "//cc",
     "//components/device_event_log",
     "//components/onc",
     "//components/signin/core/account_id",
     "//components/user_manager",
     "//components/wallpaper",
     "//media",
     "//net",
+    "//services/shell/public/cpp",
     "//skia",
     "//third_party/icu",
     "//ui/accessibility",
     "//ui/app_list/presenter",
     "//ui/aura",
     "//ui/base",
     "//ui/base:ui_data_pack",
     "//ui/base/ime",
     "//ui/compositor",
     "//ui/display",
@@ skipping 826 matching lines @@
   if (is_win) {
     configs -= [ "//build/config/win:console" ]
     configs += [ "//build/config/win:windowed" ]
     deps += [ "//sandbox" ]
   }
 
   if (is_chromeos) {
     deps += [ "//device/bluetooth" ]
   }
 }