[Sync] Componentize ProfileSyncComponentsFactoryImpl

components/browser_sync/browser/profile_sync_service.h

Index: components/browser_sync/browser/profile_sync_service.h
diff --git a/components/browser_sync/browser/profile_sync_service.h b/components/browser_sync/browser/profile_sync_service.h
index 9909a296326d592f460adcc3c84e06fbbe082ade..32c998e08026bc32eee08834f9fe586819b7d450 100644
--- a/components/browser_sync/browser/profile_sync_service.h
+++ b/components/browser_sync/browser/profile_sync_service.h
@@ -230,7 +230,6 @@ class ProfileSyncService : public sync_driver::SyncService,
     ROLLBACK    // Backend for rollback.
   };
 
-  // Takes ownership of |factory| and |signin_wrapper|.
   ProfileSyncService(
       scoped_ptr<sync_driver::SyncClient> sync_client,
       scoped_ptr<SigninManagerWrapper> signin_wrapper,
@@ -948,6 +947,7 @@ class ProfileSyncService : public sync_driver::SyncService,
 
   scoped_ptr<syncer::NetworkResources> network_resources_;
 
+  browser_sync::ProfileSyncServiceStartBehavior start_behavior_;
   scoped_ptr<browser_sync::StartupController> startup_controller_;
 
   scoped_ptr<sync_driver::BackupRollbackController> backup_rollback_controller_;