Add code to prompt for browser login during app notification setup

chrome/chrome_browser.gypi

 # Copyright (c) 2011 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
       'dependencies': [
@@ skipping 928 matching lines @@
         'browser/download/save_package_file_picker.cc',
         'browser/download/save_package_file_picker.h',
         'browser/enumerate_modules_model_win.cc',
         'browser/enumerate_modules_model_win.h',
         'browser/event_disposition.cc',
         'browser/event_disposition.h',
         'browser/extensions/app_notification.cc',
         'browser/extensions/app_notification.h',
         'browser/extensions/app_notification_manager.cc',
         'browser/extensions/app_notification_manager.h',
+        'browser/extensions/app_notify_channel_ui.cc',
+        'browser/extensions/app_notify_channel_ui.h',
         'browser/extensions/app_notify_channel_setup.cc',
         'browser/extensions/app_notify_channel_setup.h',
         'browser/extensions/app_notification_storage.cc',
         'browser/extensions/app_notification_storage.h',
         'browser/extensions/apps_promo.cc',
         'browser/extensions/apps_promo.h',
         'browser/extensions/default_apps.cc',
         'browser/extensions/default_apps.h',
         'browser/extensions/default_apps_trial.cc',
         'browser/extensions/default_apps_trial.h',
@@ skipping 4266 matching lines @@
       'type': 'static_library',
       'sources': [ 'browser/history/in_memory_url_index_cache.proto' ],
       'variables': {
         'proto_in_dir': 'browser/history',
         'proto_out_dir': 'chrome/browser/history',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }