Extract abstract base to API directory for ProfileSyncService.

chrome/chrome_browser.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': 'static_library',
@@ skipping 125 matching lines @@
         'browser/api/infobars/infobar_delegate.h',
         'browser/api/infobars/infobar_service.h',
         'browser/api/infobars/link_infobar_delegate.cc',
         'browser/api/infobars/link_infobar_delegate.h',
         'browser/api/infobars/simple_alert_infobar_delegate.cc',
         'browser/api/infobars/simple_alert_infobar_delegate.h',
         'browser/api/prefs/pref_change_registrar.cc',
         'browser/api/prefs/pref_change_registrar.h',
         'browser/api/prefs/pref_member.cc',
         'browser/api/prefs/pref_member.h',
+        'browser/api/sync/profile_sync_service_base.h',
+        'browser/api/sync/profile_sync_service_observer.h',
         'browser/api/webdata/autofill_web_data.h',
         'browser/api/webdata/web_data_results.h',
         'browser/api/webdata/web_data_service_base.cc',
         'browser/api/webdata/web_data_service_base.h',
         'browser/api/webdata/web_data_consumer.h',
         'browser/app_controller_mac.h',
         'browser/app_controller_mac.mm',
         'browser/app_icon_win.cc',
         'browser/app_icon_win.h',
         'browser/autocomplete/autocomplete_classifier.cc',
@@ skipping 1695 matching lines @@
         'browser/sync/invalidation_frontend.h',
         'browser/sync/profile_sync_components_factory.h',
         'browser/sync/profile_sync_components_factory_impl.cc',
         'browser/sync/profile_sync_components_factory_impl.h',
         'browser/sync/profile_sync_service.cc',
         'browser/sync/profile_sync_service.h',
         'browser/sync/profile_sync_service_factory.cc',
         'browser/sync/profile_sync_service_factory.h',
         'browser/sync/profile_sync_service_harness.cc',
         'browser/sync/profile_sync_service_harness.h',
-        'browser/sync/profile_sync_service_observer.h',
         'browser/sync/retry_verifier.cc',
         'browser/sync/retry_verifier.h',
         'browser/sync/sync_global_error.cc',
         'browser/sync/sync_global_error.h',
         'browser/sync/sync_prefs.cc',
         'browser/sync/sync_prefs.h',
         'browser/sync/sync_ui_util.cc',
         'browser/sync/sync_ui_util.h',
         'browser/sync/sync_ui_util_mac.h',
         'browser/sync/sync_ui_util_mac.mm',
@@ skipping 3197 matching lines @@
           'includes': [ '../build/jni_generator.gypi' ],
           'dependencies': [
             'android_jar_jni_headers',
           ],
         },
       ],
      },
     ],
   ],
 }