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

chrome/browser/ui/webui/voicesearch_ui.cc

Index: chrome/browser/ui/webui/voicesearch_ui.cc
diff --git a/chrome/browser/ui/webui/voicesearch_ui.cc b/chrome/browser/ui/webui/voicesearch_ui.cc
index a0ea3ba33a09aae29d790642a6ffdaf0bedeba2c..dd5cc2e066c8401d3aef132f20a9013c4a9a2caf 100644
--- a/chrome/browser/ui/webui/voicesearch_ui.cc
+++ b/chrome/browser/ui/webui/voicesearch_ui.cc
@@ -93,10 +93,10 @@ class VoiceSearchDomHandler : public WebUIMessageHandler {
  public:
   explicit VoiceSearchDomHandler(Profile* profile) : profile_(profile) {}
 
-  virtual ~VoiceSearchDomHandler() {}
+  ~VoiceSearchDomHandler() override {}
 
   // WebUIMessageHandler implementation.
-  virtual void RegisterMessages() override {
+  void RegisterMessages() override {
     web_ui()->RegisterMessageCallback(
         "requestVoiceSearchInfo",
         base::Bind(&VoiceSearchDomHandler::HandleRequestVoiceSearchInfo,