Add OVERRIDE to chrome/browser/.

chrome/browser/metrics/metrics_log.h

 // Copyright (c) 2011 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.
 
 // This file defines a set of user experience metrics data recorded by
 // the MetricsService.  This is the unit of data that is sent to the server.
 
 #ifndef CHROME_BROWSER_METRICS_METRICS_LOG_H_
 #define CHROME_BROWSER_METRICS_METRICS_LOG_H_
 #pragma once
@@ skipping 45 matching lines @@
   // uma log upload, just as we send histogram data.
   void RecordIncrementalStabilityElements();
 
   // Get the amount of uptime in seconds since this function was last called.
   // This updates the cumulative uptime metric for uninstall as a side effect.
   static int64 GetIncrementalUptime(PrefService* pref);
 
   // Get the current version of the application as a string.
   static std::string GetVersionString();
 
-  virtual MetricsLog* AsMetricsLog();
+  virtual MetricsLog* AsMetricsLog() OVERRIDE;
 
   // Use |extension| in all uploaded appversions in addition to the standard
   // version string.
   static void set_version_extension(const std::string& extension);
   static const std::string& version_extension();
 
  private:
   FRIEND_TEST_ALL_PREFIXES(MetricsLogTest, ChromeOSStabilityData);
 
   // Returns the date at which the current metrics client ID was created as
@@ skipping 31 matching lines @@
 
   // Writes metrics for the profile identified by key. This writes all
   // key/value pairs in profile_metrics.
   void WriteProfileMetrics(const std::string& key,
                            const base::DictionaryValue& profile_metrics);
 
   DISALLOW_COPY_AND_ASSIGN(MetricsLog);
 };
 
 #endif  // CHROME_BROWSER_METRICS_METRICS_LOG_H_