Standardize usage of virtual/override/final specifiers.

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 75 matching lines @@
 
 }  // namespace
 
 class MetricsLogTest : public testing::Test {
  public:
   MetricsLogTest() {
     MetricsLog::RegisterPrefs(prefs_.registry());
     MetricsStateManager::RegisterPrefs(prefs_.registry());
   }
 
-  virtual ~MetricsLogTest() {
-  }
+  ~MetricsLogTest() override {}
 
  protected:
   // Check that the values in |system_values| correspond to the test data
   // defined at the top of this file.
   void CheckSystemProfile(const SystemProfileProto& system_profile) {
     EXPECT_EQ(kInstallDateExpected, system_profile.install_date());
     EXPECT_EQ(kEnabledDateExpected, system_profile.uma_enabled_date());
 
     ASSERT_EQ(arraysize(kFieldTrialIds) + arraysize(kSyntheticTrials),
               static_cast<size_t>(system_profile.field_trial_size()));
@@ skipping 291 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