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

chrome/browser/sync/glue/sync_backend_host_impl_unittest.cc

 // 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.
 
 #include "chrome/browser/sync/glue/sync_backend_host_impl.h"
 
 #include <cstddef>
 
 #include "base/files/file_util.h"
 #include "base/location.h"
@@ skipping 133 matching lines @@
   FakeSyncManager** fake_manager_;
 };
 
 class SyncBackendHostTest : public testing::Test {
  protected:
   SyncBackendHostTest()
       : thread_bundle_(content::TestBrowserThreadBundle::REAL_IO_THREAD),
         profile_manager_(TestingBrowserProcess::GetGlobal()),
         fake_manager_(NULL) {}
 
-  virtual ~SyncBackendHostTest() {}
+  ~SyncBackendHostTest() override {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     ASSERT_TRUE(profile_manager_.SetUp());
     profile_ = profile_manager_.CreateTestingProfile(kTestProfileName);
     sync_prefs_.reset(new sync_driver::SyncPrefs(profile_->GetPrefs()));
     backend_.reset(new SyncBackendHostImpl(
         profile_->GetDebugName(),
         profile_,
         invalidation::ProfileInvalidationProviderFactory::GetForProfile(
             profile_)->GetInvalidationService(),
         sync_prefs_->AsWeakPtr(),
         base::FilePath(kTestSyncDir)));
@@ skipping 10 matching lines @@
     // Registrar removing them if it can't find their model workers.
     enabled_types_.Put(syncer::BOOKMARKS);
     enabled_types_.Put(syncer::PREFERENCES);
     enabled_types_.Put(syncer::SESSIONS);
     enabled_types_.Put(syncer::SEARCH_ENGINES);
     enabled_types_.Put(syncer::AUTOFILL);
 
     network_resources_.reset(new syncer::HttpBridgeNetworkResources());
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     if (backend_) {
       backend_->StopSyncingForShutdown();
       backend_->Shutdown(syncer::STOP_SYNC);
     }
     backend_.reset();
     sync_prefs_.reset();
     profile_ = NULL;
     profile_manager_.DeleteTestingProfile(kTestProfileName);
     // Pump messages posted by the sync thread (which may end up
     // posting on the IO thread).
@@ skipping 590 matching lines @@
       syncer::ModelTypeSet());
   EXPECT_TRUE(
       ready_types.Equals(syncer::Difference(enabled_types_, error_types)));
   EXPECT_FALSE(fake_manager_->GetTypesWithEmptyProgressMarkerToken(
       error_types).Empty());
 }
 
 }  // namespace
 
 }  // namespace browser_sync