Standardize usage of virtual/override/final in chrome/

chrome/test/chromedriver/performance_logger.h

 // 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.
 
 #ifndef CHROME_TEST_CHROMEDRIVER_PERFORMANCE_LOGGER_H_
 #define CHROME_TEST_CHROMEDRIVER_PERFORMANCE_LOGGER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 21 matching lines @@
   // Creates a |PerformanceLogger| with default preferences that creates entries
   // in the given Log object. The log is owned elsewhere and must not be null.
   PerformanceLogger(Log* log, const Session* session);
 
   // Creates a |PerformanceLogger| with specific preferences.
   PerformanceLogger(Log* log,
                     const Session* session,
                     const PerfLoggingPrefs& prefs);
 
   // PerformanceLogger subscribes to browser-wide |DevToolsClient| for tracing.
-  virtual bool subscribes_to_browser() override;
+  bool subscribes_to_browser() override;
 
   // For browser-wide client: enables tracing if trace categories are specified,
   // sets |browser_client_|. For other clients: calls EnableInspectorDomains.
-  virtual Status OnConnected(DevToolsClient* client) override;
+  Status OnConnected(DevToolsClient* client) override;
 
   // Calls HandleInspectorEvents or HandleTraceEvents depending on client type.
-  virtual Status OnEvent(DevToolsClient* client,
-                         const std::string& method,
-                         const base::DictionaryValue& params) override;
+  Status OnEvent(DevToolsClient* client,
+                 const std::string& method,
+                 const base::DictionaryValue& params) override;
 
   // Before whitelisted commands, if tracing enabled, calls CollectTraceEvents.
-  virtual Status BeforeCommand(const std::string& command_name) override;
+  Status BeforeCommand(const std::string& command_name) override;
 
  private:
   void AddLogEntry(Log::Level level,
                    const std::string& webview,
                    const std::string& method,
                    const base::DictionaryValue& params);
 
   void AddLogEntry(const std::string& webview,
                    const std::string& method,
                    const base::DictionaryValue& params);
@@ skipping 19 matching lines @@
   Log* log_;  // The log where to create entries.
   const Session* session_;
   PerfLoggingPrefs prefs_;
   DevToolsClient* browser_client_; // Pointer to browser-wide |DevToolsClient|.
   bool trace_buffering_;  // True unless trace stopped and all events received.
 
   DISALLOW_COPY_AND_ASSIGN(PerformanceLogger);
 };
 
 #endif  // CHROME_TEST_CHROMEDRIVER_PERFORMANCE_LOGGER_H_