Standardize usage of virtual/override/final specifiers.

components/invalidation/registration_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 "components/invalidation/registration_manager.h"
 
 #include <algorithm>
 #include <cmath>
 #include <cstddef>
 #include <deque>
@@ skipping 130 matching lines @@
     }
   }
   EXPECT_EQ(expected_pending_ids, pending_ids);
 }
 
 class RegistrationManagerTest : public testing::Test {
  protected:
   RegistrationManagerTest()
       : fake_registration_manager_(&fake_invalidation_client_) {}
 
-  virtual ~RegistrationManagerTest() {}
+  ~RegistrationManagerTest() override {}
 
   void LoseRegistrations(const ObjectIdSet& oids) {
     for (ObjectIdSet::const_iterator it = oids.begin(); it != oids.end();
          ++it) {
       fake_invalidation_client_.LoseRegistration(*it);
       fake_registration_manager_.MarkRegistrationLost(*it);
     }
   }
 
   void DisableIds(const ObjectIdSet& oids) {
@@ skipping 258 matching lines @@
       fake_registration_manager_.GetPendingRegistrationsForTest());
 
   fake_registration_manager_.MarkAllRegistrationsLost();
   ExpectPendingRegistrations(
       enabled_ids, 0.0,
       fake_registration_manager_.GetPendingRegistrationsForTest());
 }
 
 }  // namespace
 }  // namespace syncer