cros: Extract TrayBluetoothHelper from SystemTrayDelegateChromeOS

chrome/test/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/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//chrome/common/features.gni")
@@ skipping 4158 matching lines @@
       "../browser/ui/ash/launcher/arc_app_shelf_id_unittest.cc",
       "../browser/ui/ash/launcher/chrome_launcher_controller_impl_unittest.cc",
       "../browser/ui/ash/launcher/launcher_context_menu_unittest.cc",
       "../browser/ui/ash/multi_user/multi_user_context_menu_chromeos_unittest.cc",
       "../browser/ui/ash/multi_user/multi_user_notification_blocker_chromeos_unittest.cc",
       "../browser/ui/ash/multi_user/multi_user_util_chromeos_unittest.cc",
       "../browser/ui/ash/multi_user/multi_user_window_manager_chromeos_unittest.cc",
       "../browser/ui/ash/multi_user/user_switch_util_unittest.cc",
       "../browser/ui/ash/session_controller_client_unittest.cc",
       "../browser/ui/ash/system_tray_delegate_chromeos_unittest.cc",
+      "../browser/ui/ash/tray_bluetooth_helper_unittest.cc",
       "../browser/ui/ash/window_positioner_unittest.cc",
       "../browser/ui/window_sizer/window_sizer_ash_unittest.cc",
     ]
     deps += [
       "//ash/resources",
       "//ash/strings",
       "//ash/test:ash_with_aura_test_support",
       "//ash/test:test_support_with_content",
     ]
 
@@ skipping 996 matching lines @@
 }
 
 if (is_win) {
   loadable_module("conflicts_dll") {
     testonly = true
     sources = [
       "conflicts/conflicts_dll.cc",
     ]
   }
 }