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

chrome/chrome_browser_extensions.gypi

 # Copyright (c) 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': 'browser_extensions',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 44 matching lines @@
         # tests and mocks.
         '../extensions/browser/extension_prefs_scope.h',
         '../extensions/browser/extension_error.cc',
         '../extensions/browser/extension_error.h',
         '../extensions/browser/file_reader.cc',
         '../extensions/browser/file_reader.h',
         '../extensions/browser/pref_names.cc',
         '../extensions/browser/pref_names.h',
         '../extensions/browser/view_type_utils.cc',
         '../extensions/browser/view_type_utils.h',
+        'browser/apps/chrome_apps_client.cc',
+        'browser/apps/chrome_apps_client.h',
         'browser/apps/shortcut_manager.cc',
         'browser/apps/shortcut_manager.h',
         'browser/apps/shortcut_manager_factory.cc',
         'browser/apps/shortcut_manager_factory.h',
         'browser/extensions/active_tab_permission_granter.cc',
         'browser/extensions/active_tab_permission_granter.h',
         'browser/extensions/activity_log/activity_action_constants.cc',
         'browser/extensions/activity_log/activity_action_constants.h',
         'browser/extensions/activity_log/activity_actions.cc',
         'browser/extensions/activity_log/activity_actions.h',
@@ skipping 964 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/chromeos/contacts',
             'proto_out_dir': 'chrome/browser/chromeos/contacts',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],  # 'chromeos=1'
   ],  # 'conditions'
 }