Standardize usage of virtual/override/final in components/

components/signin/core/browser/account_tracker_service_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 <algorithm>
 #include <vector>
 
 #include "base/message_loop/message_loop.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/testing_pref_service.h"
@@ skipping 80 matching lines @@
     needs_comma = true;
     str += it->ToString();
   }
   str += "]";
   return str;
 }
 
 class AccountTrackerObserver : public AccountTrackerService::Observer {
  public:
   AccountTrackerObserver() {}
-  virtual ~AccountTrackerObserver() {}
+  ~AccountTrackerObserver() override {}
 
   void Clear();
   void SortEventsByUser();
 
   testing::AssertionResult CheckEvents();
   testing::AssertionResult CheckEvents(const TrackingEvent& e1);
   testing::AssertionResult CheckEvents(const TrackingEvent& e1,
                                        const TrackingEvent& e2);
   testing::AssertionResult CheckEvents(const TrackingEvent& e1,
                                        const TrackingEvent& e2,
                                        const TrackingEvent& e3);
 
  private:
   // AccountTrackerService::Observer implementation
-  virtual void OnAccountUpdated(
-      const AccountTrackerService::AccountInfo& ids) override;
-  virtual void OnAccountRemoved(
-      const AccountTrackerService::AccountInfo& ids) override;
+  void OnAccountUpdated(const AccountTrackerService::AccountInfo& ids) override;
+  void OnAccountRemoved(const AccountTrackerService::AccountInfo& ids) override;
 
   testing::AssertionResult CheckEvents(
       const std::vector<TrackingEvent>& events);
 
   std::vector<TrackingEvent> events_;
 };
 
 void AccountTrackerObserver::OnAccountUpdated(
     const AccountTrackerService::AccountInfo& ids) {
   events_.push_back(TrackingEvent(UPDATED, ids.account_id, ids.gaia));
@@ skipping 370 matching lines @@
 
     std::vector<AccountTrackerService::AccountInfo> infos =
         tracker.GetAccounts();
     ASSERT_EQ(1u, infos.size());
     EXPECT_EQ("beta", infos[0].account_id);
     EXPECT_EQ(AccountIdToGaiaId("beta"), infos[0].gaia);
     EXPECT_EQ(AccountIdToEmail("beta"), infos[0].email);
     tracker.Shutdown();
   }
 }