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

chrome/renderer/net/net_error_page_controller.h

Index: chrome/renderer/net/net_error_page_controller.h
diff --git a/chrome/renderer/net/net_error_page_controller.h b/chrome/renderer/net/net_error_page_controller.h
index f77538293291037c25b0fe44790cdc6d52671963..d28ea14a8c31a717e41c777708bcd0d12c5278a2 100644
--- a/chrome/renderer/net/net_error_page_controller.h
+++ b/chrome/renderer/net/net_error_page_controller.h
@@ -28,7 +28,7 @@ class NetErrorPageController
 
  private:
   explicit NetErrorPageController(content::RenderFrame* render_frame);
-  virtual ~NetErrorPageController();
+  ~NetErrorPageController() override;
 
   // Execute a "Load Stale" button click.
   bool LoadStaleButtonClick();
@@ -44,13 +44,13 @@ class NetErrorPageController
   bool TrackClick(const gin::Arguments& args);
 
   // gin::WrappableBase
-  virtual gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
+  gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
       v8::Isolate* isolate) override;
 
   // RenderFrameObserver.  Overridden to avoid being destroyed when RenderFrame
   // goes away; NetErrorPageController objects are owned by the JS
   // garbage collector.
-  virtual void OnDestruct() override;
+  void OnDestruct() override;
 
   DISALLOW_COPY_AND_ASSIGN(NetErrorPageController);
 };