Properly handle initialization failure and following manager shutdown without

sync/internal_api/sync_rollback_manager_base.h

Index: sync/internal_api/sync_rollback_manager_base.h
diff --git a/sync/internal_api/sync_rollback_manager_base.h b/sync/internal_api/sync_rollback_manager_base.h
index 17892a8ed06eb9bc64fd2b9a772478cc97d06355..8d32d7db6c00f8fe6cee3de686116b72e1a6783b 100644
--- a/sync/internal_api/sync_rollback_manager_base.h
+++ b/sync/internal_api/sync_rollback_manager_base.h
@@ -123,6 +123,10 @@ class SYNC_EXPORT_PRIVATE SyncRollbackManagerBase :
       syncer::TypeDebugInfoObserver* observer) OVERRIDE;
   virtual void RequestEmitDebugInfo() OVERRIDE;
 
+  bool initialized() const {
+    return initialized_;
+  }
+
  private:
   void NotifyInitializationSuccess();
   void NotifyInitializationFailure();
@@ -144,6 +148,8 @@ class SYNC_EXPORT_PRIVATE SyncRollbackManagerBase :
 
   scoped_ptr<SyncEncryptionHandler> dummy_handler_;
 
+  bool initialized_;
+
   DISALLOW_COPY_AND_ASSIGN(SyncRollbackManagerBase);
 };