[Sync] Update SyncBackendHost to forward ClearServerData to SyncManager

chrome/browser/sync/glue/sync_backend_host_impl.h

 // Copyright 2013 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_GLUE_SYNC_BACKEND_HOST_IMPL_H_
 #define CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_IMPL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 117 matching lines @@
   void RequestBufferedProtocolEventsAndEnableForwarding() override;
   void DisableProtocolEventForwarding() override;
   void EnableDirectoryTypeDebugInfoForwarding() override;
   void DisableDirectoryTypeDebugInfoForwarding() override;
   void GetAllNodesForTypes(
       syncer::ModelTypeSet types,
       base::Callback<void(const std::vector<syncer::ModelType>&,
                           ScopedVector<base::ListValue>)> type) override;
   base::MessageLoop* GetSyncLoopForTesting() override;
   void RefreshTypesForTest(syncer::ModelTypeSet types) override;
+  void ClearServerData(
+      const syncer::SyncManager::ClearServerDataCallback& callback) override;
 
  protected:
   // The types and functions below are protected so that test
   // subclasses can use them.
 
   // Allows tests to perform alternate core initialization work.
   virtual void InitCore(scoped_ptr<DoInitializeOptions> options);
 
   // Request the syncer to reconfigure with the specfied params.
   // Virtual for testing.
@@ skipping 146 matching lines @@
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
   // InvalidationHandler implementation.
   void OnInvalidatorStateChange(syncer::InvalidatorState state) override;
   void OnIncomingInvalidation(
       const syncer::ObjectIdInvalidationMap& invalidation_map) override;
   std::string GetOwnerName() const override;
 
+  void ClearServerDataDoneOnFrontendLoop(
+      const syncer::SyncManager::ClearServerDataCallback& frontend_callback);
+
   content::NotificationRegistrar notification_registrar_;
 
   // A reference to the MessageLoop used to construct |this|, so we know how
   // to safely talk back to the SyncFrontend.
   base::MessageLoop* const frontend_loop_;
 
   Profile* const profile_;
 
   // Name used for debugging (set from profile_->GetDebugName()).
   const std::string name_;
@@ skipping 44 matching lines @@
   bool invalidation_handler_registered_;
 
   base::WeakPtrFactory<SyncBackendHostImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncBackendHostImpl);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_GLUE_SYNC_BACKEND_HOST_IMPL_H_