[Sync] Refactor sync manager into interface.

chrome/browser/sync/profile_sync_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_
 #define CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_
 
 #include <list>
 #include <string>
 
@@ skipping 16 matching lines @@
 #include "chrome/browser/sync/invalidations/invalidator_storage.h"
 #include "chrome/browser/sync/profile_sync_service_observer.h"
 #include "chrome/browser/sync/sync_prefs.h"
 #include "chrome/common/net/gaia/google_service_auth_error.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_types.h"
 #include "googleurl/src/gurl.h"
 #include "sync/internal_api/public/base/model_type.h"
 #include "sync/internal_api/public/engine/model_safe_worker.h"
+#include "sync/internal_api/public/sync_manager_factory.h"
 #include "sync/internal_api/public/util/experiments.h"
 #include "sync/internal_api/public/util/unrecoverable_error_handler.h"
 #include "sync/js/sync_js_controller.h"
 
 class Profile;
 class ProfileSyncComponentsFactory;
 class SigninManager;
 class SyncGlobalError;
 
 namespace browser_sync {
 class BackendMigrator;
 class ChangeProcessor;
 class DataTypeManager;
 class JsController;
 class SessionModelAssociator;
+
 namespace sessions { class SyncSessionSnapshot; }
 }
 
 namespace syncer {
 class BaseTransaction;
 struct SyncCredentials;
 struct UserShare;
 }
 
 namespace sync_pb {
@@ skipping 723 matching lines @@
 
   browser_sync::DataTypeManager::ConfigureStatus configure_status_;
 
   // If |true|, there is setup UI visible so we should not start downloading
   // data types.
   bool setup_in_progress_;
 
   // The set of currently enabled sync experiments.
   syncer::Experiments current_experiments;
 
+  // Factory the backend will use to build the SyncManager.
+  syncer::SyncManagerFactory sync_manager_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(ProfileSyncService);
 };
 
 bool ShouldShowActionOnUI(
     const syncer::SyncProtocolError& error);
 
 
 #endif  // CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_