dbus: Add ObjectProxy::WaitForServiceToBeAvailable()

dbus/dbus.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 85 matching lines @@
         'dbus_test_support',
       ],
       'sources': [
         'bus_unittest.cc',
         'dbus_statistics_unittest.cc',
         'end_to_end_async_unittest.cc',
         'end_to_end_sync_unittest.cc',
         'message_unittest.cc',
         'mock_unittest.cc',
         'object_manager_unittest.cc',
+        'object_proxy_unittest.cc',
         'property_unittest.cc',
         'signal_sender_verification_unittest.cc',
         'string_util_unittest.cc',
         'test_service.cc',
         'test_service.h',
         'values_util_unittest.cc',
       ],
       'include_dirs': [
         '..',
       ],
@@ skipping 11 matching lines @@
         'test_server.cc',
         'test_service.cc',
         'test_service.h',
       ],
       'include_dirs': [
         '..',
       ],
     },
   ],
 }