Introduce AppsClient and use it in apps to get the loaded profiles list.

apps/apps.gypi

 # Copyright 2013 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': 'apps',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 34 matching lines @@
         'app_shim/app_shim_host_mac.h',
         'app_shim/app_shim_host_manager_mac.h',
         'app_shim/app_shim_host_manager_mac.mm',
         'app_shim/app_shim_mac.cc',
         'app_shim/app_shim_mac.h',
         'app_shim/chrome_main_app_mode_mac.mm',
         'app_shim/extension_app_shim_handler_mac.cc',
         'app_shim/extension_app_shim_handler_mac.h',
         'app_window_contents.cc',
         'app_window_contents.h',
+        'apps_client.cc',
+        'apps_client.h',
         'field_trial_names.cc',
         'field_trial_names.h',
         'launcher.cc',
         'launcher.h',
         'metrics_names.h',
         'native_app_window.h',
         'pref_names.cc',
         'pref_names.h',
         'prefs.cc',
         'prefs.h',
@@ skipping 24 matching lines @@
               ['exclude', '^apps/'],
             ],
           }
         ],
       ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
   ],
 }