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

chrome/browser/ui/webui/extensions/install_extension_handler.h

Index: chrome/browser/ui/webui/extensions/install_extension_handler.h
diff --git a/chrome/browser/ui/webui/extensions/install_extension_handler.h b/chrome/browser/ui/webui/extensions/install_extension_handler.h
index a0bc6511bd44fb1aed4e2c1c73a1945c008966d6..eba03642fb6512221c7dd04bc7d17bede48917ed 100644
--- a/chrome/browser/ui/webui/extensions/install_extension_handler.h
+++ b/chrome/browser/ui/webui/extensions/install_extension_handler.h
@@ -20,12 +20,12 @@ namespace extensions {
 class InstallExtensionHandler : public content::WebUIMessageHandler {
  public:
   InstallExtensionHandler();
-  virtual ~InstallExtensionHandler();
+  ~InstallExtensionHandler() override;
 
   void GetLocalizedValues(content::WebUIDataSource* source);
 
   // WebUIMessageHandler implementation.
-  virtual void RegisterMessages() override;
+  void RegisterMessages() override;
 
  private:
   // Handles a notification from the JavaScript that a drag has started. This is