arc: Create sync protos for Arc package.

components/sync_driver/model_association_manager.cc

 // Copyright 2014 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.
 
 #include "components/sync_driver/model_association_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 36 matching lines @@
   // UI thread data types.
   syncer::BOOKMARKS,
   syncer::SUPERVISED_USERS,     //  Syncing supervised users on initial login
                                 //  might block creating a new supervised user,
                                 //  so we want to do it early.
   syncer::PREFERENCES,
   syncer::PRIORITY_PREFERENCES,
   syncer::EXTENSIONS,
   syncer::APPS,
   syncer::APP_LIST,
+  syncer::ARC_PACKAGE,
   syncer::THEMES,
   syncer::SEARCH_ENGINES,
   syncer::SESSIONS,
   syncer::APP_NOTIFICATIONS,
   syncer::DICTIONARY,
   syncer::FAVICON_IMAGES,
   syncer::FAVICON_TRACKING,
   syncer::SUPERVISED_USER_SETTINGS,
   syncer::SUPERVISED_USER_SHARED_SETTINGS,
   syncer::SUPERVISED_USER_WHITELISTS,
@@ skipping 385 matching lines @@
       // At least one type is not ready.
       return;
     }
   }
 
   notified_about_ready_for_configure_ = true;
   delegate_->OnAllDataTypesReadyForConfigure();
 }
 
 }  // namespace sync_driver