Standardize usage of virtual/override/final in chrome/browser/

chrome/browser/chrome_net_benchmarking_message_filter.h

Index: chrome/browser/chrome_net_benchmarking_message_filter.h
diff --git a/chrome/browser/chrome_net_benchmarking_message_filter.h b/chrome/browser/chrome_net_benchmarking_message_filter.h
index 0c4c4bb6e50faf3e0227d8c460952581c594168d..2921d44891269def81ebba27cda0cffa38e934ae 100644
--- a/chrome/browser/chrome_net_benchmarking_message_filter.h
+++ b/chrome/browser/chrome_net_benchmarking_message_filter.h
@@ -23,10 +23,10 @@ class ChromeNetBenchmarkingMessageFilter
       net::URLRequestContextGetter* request_context);
 
   // content::BrowserMessageFilter methods:
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
+  bool OnMessageReceived(const IPC::Message& message) override;
 
  private:
-  virtual ~ChromeNetBenchmarkingMessageFilter();
+  ~ChromeNetBenchmarkingMessageFilter() override;
 
   // Message handlers.
   void OnCloseCurrentConnections();