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

chrome/browser/search/hotword_service.h

Index: chrome/browser/search/hotword_service.h
diff --git a/chrome/browser/search/hotword_service.h b/chrome/browser/search/hotword_service.h
index b2b2188c9e1505725c9fbed6f158bc5d86e266bb..3a70003bdbfbf9323c690033ce4ed5518e1b8a71 100644
--- a/chrome/browser/search/hotword_service.h
+++ b/chrome/browser/search/hotword_service.h
@@ -43,22 +43,20 @@ class HotwordService : public content::NotificationObserver,
   static bool IsExperimentalHotwordingEnabled();
 
   explicit HotwordService(Profile* profile);
-  virtual ~HotwordService();
+  ~HotwordService() override;
 
   // Overridden from 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;
 
   // Overridden from ExtensionRegisterObserver:
-  virtual void OnExtensionInstalled(
-      content::BrowserContext* browser_context,
-      const extensions::Extension* extension,
-      bool is_update) override;
-  virtual void OnExtensionUninstalled(
-      content::BrowserContext* browser_context,
-      const extensions::Extension* extension,
-      extensions::UninstallReason reason) override;
+  void OnExtensionInstalled(content::BrowserContext* browser_context,
+                            const extensions::Extension* extension,
+                            bool is_update) override;
+  void OnExtensionUninstalled(content::BrowserContext* browser_context,
+                              const extensions::Extension* extension,
+                              extensions::UninstallReason reason) override;
 
   // Checks for whether all the necessary files have downloaded to allow for
   // using the extension.