sync: Refactor migration integration tests

chrome/chrome_tests.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.
 {
   'includes': [
     'js_unittest_vars.gypi',
   ],
   'targets': [
     {
       'target_name': 'interactive_ui_tests',
@@ skipping 2313 matching lines @@
         'browser/sync/test/integration/dictionary_helper.cc',
         'browser/sync/test/integration/dictionary_helper.h',
         'browser/sync/test/integration/dictionary_load_observer.cc',
         'browser/sync/test/integration/dictionary_load_observer.h',
         'browser/sync/test/integration/extension_settings_helper.cc',
         'browser/sync/test/integration/extension_settings_helper.h',
         'browser/sync/test/integration/extensions_helper.cc',
         'browser/sync/test/integration/extensions_helper.h',
         'browser/sync/test/integration/fake_server_invalidation_service.cc',
         'browser/sync/test/integration/fake_server_invalidation_service.h',
+        'browser/sync/test/integration/migration_waiter.cc',
+        'browser/sync/test/integration/migration_waiter.h',
+        'browser/sync/test/integration/migration_watcher.cc',
+        'browser/sync/test/integration/migration_watcher.h',
         'browser/sync/test/integration/multi_client_status_change_checker.cc',
         'browser/sync/test/integration/multi_client_status_change_checker.h',
         'browser/sync/test/integration/passwords_helper.cc',
         'browser/sync/test/integration/passwords_helper.h',
         'browser/sync/test/integration/p2p_invalidation_forwarder.cc',
         'browser/sync/test/integration/p2p_invalidation_forwarder.h',
         'browser/sync/test/integration/preferences_helper.cc',
         'browser/sync/test/integration/preferences_helper.h',
         'browser/sync/test/integration/profile_sync_service_harness.cc',
         'browser/sync/test/integration/profile_sync_service_harness.h',
@@ skipping 687 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }