Standardize usage of virtual/override/final in components/

components/metrics/metrics_log_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/metrics/metrics_log.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/basictypes.h"
@@ skipping 35 matching lines @@
   TestMetricsLog(const std::string& client_id,
                  int session_id,
                  LogType log_type,
                  MetricsServiceClient* client,
                  TestingPrefServiceSimple* prefs)
       : MetricsLog(client_id, session_id, log_type, client, prefs),
         prefs_(prefs) {
     InitPrefs();
   }
 
-  virtual ~TestMetricsLog() {}
+  ~TestMetricsLog() override {}
 
   const ChromeUserMetricsExtension& uma_proto() const {
     return *MetricsLog::uma_proto();
   }
 
   const SystemProfileProto& system_profile() const {
     return uma_proto().system_profile();
   }
 
  private:
   void InitPrefs() {
     prefs_->SetString(prefs::kMetricsReportingEnabledTimestamp,
                       base::Int64ToString(kEnabledDate));
   }
 
-  virtual void GetFieldTrialIds(
-      std::vector<variations::ActiveGroupId>* field_trial_ids) const
-      override {
+  void GetFieldTrialIds(
+      std::vector<variations::ActiveGroupId>* field_trial_ids) const override {
     ASSERT_TRUE(field_trial_ids->empty());
 
     for (size_t i = 0; i < arraysize(kFieldTrialIds); ++i) {
       field_trial_ids->push_back(kFieldTrialIds[i]);
     }
   }
 
   // Weak pointer to the PrefsService used by this log.
   TestingPrefServiceSimple* prefs_;
 
@@ skipping 315 matching lines @@
   TestMetricsServiceClient client;
   client.set_product(kTestProduct);
   TestMetricsLog log(
       kClientId, kSessionId, MetricsLog::ONGOING_LOG, &client, &prefs_);
   // Check that the product is set to |kTestProduct|.
   EXPECT_TRUE(log.uma_proto().has_product());
   EXPECT_EQ(kTestProduct, log.uma_proto().product());
 }
 
 }  // namespace metrics