sync: Remove ClearUserData command.

sync/internal_api/js_sync_manager_observer.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 SYNC_INTERNAL_API_JS_SYNC_MANAGER_OBSERVER_H_
 #define SYNC_INTERNAL_API_JS_SYNC_MANAGER_OBSERVER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 32 matching lines @@
   virtual void OnPassphraseAccepted() OVERRIDE;
   virtual void OnBootstrapTokenUpdated(
       const std::string& bootstrap_token) OVERRIDE;
   virtual void OnEncryptedTypesChanged(
       syncable::ModelTypeSet encrypted_types,
       bool encrypt_everything) OVERRIDE;
   virtual void OnEncryptionComplete() OVERRIDE;
   virtual void OnInitializationComplete(
       const WeakHandle<JsBackend>& js_backend, bool success) OVERRIDE;
   virtual void OnStopSyncingPermanently() OVERRIDE;
-  virtual void OnClearServerDataSucceeded() OVERRIDE;
-  virtual void OnClearServerDataFailed() OVERRIDE;
   virtual void OnActionableError(
       const browser_sync::SyncProtocolError& sync_protocol_error) OVERRIDE;
 
  private:
   void HandleJsEvent(const tracked_objects::Location& from_here,
                     const std::string& name, const JsEventDetails& details);
 
   WeakHandle<JsEventHandler> event_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(JsSyncManagerObserver);
 };
 
 }  // namespace browser_sync
 
 #endif  // SYNC_INTERNAL_API_JS_SYNC_MANAGER_OBSERVER_H_