Standardize usage of virtual/override/final in extensions/

extensions/browser/extension_host.h

Index: extensions/browser/extension_host.h
diff --git a/extensions/browser/extension_host.h b/extensions/browser/extension_host.h
index e732a25155f00739ae3925fcb94b5cad23d6937f..def200d3a1dca2e35a34660f152f967211702dc0 100644
--- a/extensions/browser/extension_host.h
+++ b/extensions/browser/extension_host.h
@@ -50,7 +50,7 @@ class ExtensionHost : public content::WebContentsDelegate,
   ExtensionHost(const Extension* extension,
                 content::SiteInstance* site_instance,
                 const GURL& url, ViewType host_type);
-  virtual ~ExtensionHost();
+  ~ExtensionHost() override;
 
   const Extension* extension() const { return extension_; }
   const std::string& extension_id() const { return extension_id_; }
@@ -76,41 +76,36 @@ class ExtensionHost : public content::WebContentsDelegate,
   void CreateRenderViewSoon();
 
   // content::WebContentsObserver
-  virtual bool OnMessageReceived(const IPC::Message& message) override;
-  virtual void RenderViewCreated(
-      content::RenderViewHost* render_view_host) override;
-  virtual void RenderViewDeleted(
-      content::RenderViewHost* render_view_host) override;
-  virtual void RenderViewReady() override;
-  virtual void RenderProcessGone(base::TerminationStatus status) override;
-  virtual void DocumentAvailableInMainFrame() override;
-  virtual void DidStopLoading(
-      content::RenderViewHost* render_view_host) override;
+  bool OnMessageReceived(const IPC::Message& message) override;
+  void RenderViewCreated(content::RenderViewHost* render_view_host) override;
+  void RenderViewDeleted(content::RenderViewHost* render_view_host) override;
+  void RenderViewReady() override;
+  void RenderProcessGone(base::TerminationStatus status) override;
+  void DocumentAvailableInMainFrame() override;
+  void DidStopLoading(content::RenderViewHost* render_view_host) override;
 
   // content::WebContentsDelegate
-  virtual content::JavaScriptDialogManager*
-      GetJavaScriptDialogManager() override;
-  virtual void AddNewContents(content::WebContents* source,
-                              content::WebContents* new_contents,
-                              WindowOpenDisposition disposition,
-                              const gfx::Rect& initial_pos,
-                              bool user_gesture,
-                              bool* was_blocked) override;
-  virtual void CloseContents(content::WebContents* contents) override;
-  virtual void RequestMediaAccessPermission(
+  content::JavaScriptDialogManager* GetJavaScriptDialogManager() override;
+  void AddNewContents(content::WebContents* source,
+                      content::WebContents* new_contents,
+                      WindowOpenDisposition disposition,
+                      const gfx::Rect& initial_pos,
+                      bool user_gesture,
+                      bool* was_blocked) override;
+  void CloseContents(content::WebContents* contents) override;
+  void RequestMediaAccessPermission(
       content::WebContents* web_contents,
       const content::MediaStreamRequest& request,
       const content::MediaResponseCallback& callback) override;
-  virtual bool CheckMediaAccessPermission(
-      content::WebContents* web_contents,
-      const GURL& security_origin,
-      content::MediaStreamType type) override;
-  virtual bool IsNeverVisible(content::WebContents* web_contents) override;
+  bool CheckMediaAccessPermission(content::WebContents* web_contents,
+                                  const GURL& security_origin,
+                                  content::MediaStreamType type) override;
+  bool IsNeverVisible(content::WebContents* web_contents) 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;
 
  protected:
   content::NotificationRegistrar* registrar() { return &registrar_; }