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

chrome/browser/ui/hung_plugin_tab_helper.h

Index: chrome/browser/ui/hung_plugin_tab_helper.h
diff --git a/chrome/browser/ui/hung_plugin_tab_helper.h b/chrome/browser/ui/hung_plugin_tab_helper.h
index 97b4f3aeb11adbb6c63495335bdbf1bdaf711d0b..14649fdecd53ac24a05da5646fc0dc53a024a7c7 100644
--- a/chrome/browser/ui/hung_plugin_tab_helper.h
+++ b/chrome/browser/ui/hung_plugin_tab_helper.h
@@ -41,19 +41,19 @@ class HungPluginTabHelper
       public content::NotificationObserver,
       public content::WebContentsUserData<HungPluginTabHelper> {
  public:
-  virtual ~HungPluginTabHelper();
+  ~HungPluginTabHelper() override;
 
   // content::WebContentsObserver:
-  virtual void PluginCrashed(const base::FilePath& plugin_path,
-                             base::ProcessId plugin_pid) override;
-  virtual void PluginHungStatusChanged(int plugin_child_id,
-                                       const base::FilePath& plugin_path,
-                                       bool is_hung) override;
+  void PluginCrashed(const base::FilePath& plugin_path,
+                     base::ProcessId plugin_pid) override;
+  void PluginHungStatusChanged(int plugin_child_id,
+                               const base::FilePath& plugin_path,
+                               bool is_hung) override;
 
   // content::NotificationObserver:
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) override;
+  void Observe(int type,
+               const content::NotificationSource& source,
+               const content::NotificationDetails& details) override;
 
   // Called by an infobar when the user selects to kill the plugin.
   void KillPlugin(int child_id);