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

chrome/browser/ui/webui/metrics_handler.h

Index: chrome/browser/ui/webui/metrics_handler.h
diff --git a/chrome/browser/ui/webui/metrics_handler.h b/chrome/browser/ui/webui/metrics_handler.h
index f5331a2b2227e6730d3e582facfca2821e646e1d..7fe8db086910aeb8d19afd2b7d64c4ec0caa858d 100644
--- a/chrome/browser/ui/webui/metrics_handler.h
+++ b/chrome/browser/ui/webui/metrics_handler.h
@@ -25,10 +25,10 @@ class ListValue;
 class MetricsHandler : public content::WebUIMessageHandler {
  public:
   MetricsHandler();
-  virtual ~MetricsHandler();
+  ~MetricsHandler() override;
 
   // WebUIMessageHandler implementation.
-  virtual void RegisterMessages() override;
+  void RegisterMessages() override;
 
   // Callback for the "metricsHandler:recordAction" message. This records a
   // user action.