Add integraton test for sync backup/rollback.

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 <string>
 #include <utility>
 #include <vector>
@@ skipping 748 matching lines @@
       scoped_ptr<syncer::NetworkResources> network_resources);
 
   virtual bool IsSessionsDataTypeControllerRunning() const;
 
   void SetBackupStartDelayForTest(base::TimeDelta delay);
 
   BackendMode backend_mode() const {
     return backend_mode_;
   }
 
+  bool is_syncing() const {

[rlarocque, 2014/06/03 22:59:48]

How does this differ from ShouldPushChanges()?

[haitaol1, 2014/06/04 18:21:30]

That should work too. Removed this.

On 2014/06/03 22:59:48, rlarocque wrote:

+    return is_syncing_;
+  }
+
  protected:
   // Helper to configure the priority data types.
   void ConfigurePriorityDataTypes();
 
   // Helper to install and configure a data type manager.
   void ConfigureDataTypeManager();
 
   // Shuts down the backend sync components.
   // |option| indicates if syncing is being disabled or not, and whether
   // to claim ownership of sync thread from backend.
@@ skipping 182 matching lines @@
   // Indicates if this is the first time sync is being configured.  This value
   // is equal to !HasSyncSetupCompleted() at the time of OnBackendInitialized().
   bool is_first_time_sync_configure_;
 
   // List of available data type controllers for directory types.
   browser_sync::DataTypeController::TypeMap directory_data_type_controllers_;
 
   // Whether the SyncBackendHost has been initialized.
   bool backend_initialized_;
 
+  // Whether StartSyncingWithServer() has been called.
+  bool is_syncing_;
+
   // Set when sync receives DISABLED_BY_ADMIN error from server. Prevents
   // ProfileSyncService from starting backend till browser restarted or user
   // signed out.
   bool sync_disabled_by_admin_;
 
   // Set to true if a signin has completed but we're still waiting for the
   // backend to refresh its credentials.
   bool is_auth_in_progress_;
 
   // Encapsulates user signin - used to set/get the user's authenticated
@@ skipping 119 matching lines @@
   base::TimeDelta backup_start_delay_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileSyncService);
 };
 
 bool ShouldShowActionOnUI(
     const syncer::SyncProtocolError& error);
 
 
 #endif  // CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_