Handle birthday errors by disabling sync and deleting sync data.

chrome/browser/sync/profile_sync_service.h

 // Copyright (c) 2010 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 <map>
 
@@ skipping 138 matching lines @@
   virtual void DisableForUser();
 
   // Whether sync is enabled by user or not.
   virtual bool HasSyncSetupCompleted() const;
   void SetSyncSetupCompleted();
 
   // SyncFrontend implementation.
   virtual void OnBackendInitialized();
   virtual void OnSyncCycleCompleted();
   virtual void OnAuthError();
+  virtual void OnStopSyncingPermanently();
 
   // Called when a user enters credentials through UI.
   virtual void OnUserSubmittedAuth(const std::string& username,
                                    const std::string& password,
                                    const std::string& captcha);
 
   // Called when a user chooses which data types to sync as part of the sync
   // setup wizard.  |sync_everything| represents whether they chose the
   // "keep everything synced" option; if true, |chosen_types| will be ignored
   // and all data types will be synced.  |sync_everything| means "sync all
@@ skipping 273 matching lines @@
 
   NotificationRegistrar registrar_;
 
   ScopedRunnableMethodFactory<ProfileSyncService>
     scoped_runnable_method_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileSyncService);
 };
 
 #endif  // CHROME_BROWSER_SYNC_PROFILE_SYNC_SERVICE_H_