Update {virtual,override} to follow C++11 style in sync.

sync/internal_api/sync_backup_manager_unittest.cc

 // Copyright 2014 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.
 
 #include "sync/internal_api/sync_backup_manager.h"
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/run_loop.h"
 #include "sync/internal_api/public/read_node.h"
 #include "sync/internal_api/public/read_transaction.h"
@@ skipping 27 matching lines @@
   MOCK_METHOD1(OnConnectionStatusChange, void(ConnectionStatus));
   MOCK_METHOD1(OnActionableError, void(const SyncProtocolError&));
   MOCK_METHOD1(OnMigrationRequested, void(ModelTypeSet));;
   MOCK_METHOD1(OnProtocolEvent, void(const ProtocolEvent&));
   MOCK_METHOD4(OnInitializationComplete,
                void(const WeakHandle<JsBackend>&,
                     const WeakHandle<DataTypeDebugInfoListener>&,
                     bool, ModelTypeSet));
 
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     CHECK(temp_dir_.CreateUniqueTempDir());
   }
 
   void InitManager(SyncManager* manager,
                    InternalComponentsFactory::StorageOption storage_option) {
     manager_ = manager;
     EXPECT_CALL(*this, OnInitializationComplete(_, _, _, _))
         .WillOnce(WithArgs<2>(Invoke(this,
                                      &SyncBackupManagerTest::HandleInit)));
 
@@ skipping 117 matching lines @@
 
 TEST_F(SyncBackupManagerTest, FailToInitialize) {
   // Test graceful shutdown on initialization failure.
   scoped_ptr<SyncBackupManager> manager(new SyncBackupManager);
   InitManager(manager.get(), InternalComponentsFactory::STORAGE_INVALID);
 }
 
 }  // anonymous namespace
 
 }  // namespace syncer