Standardize usage of virtual/override/final specifiers.

ash/test/ash_test_views_delegate.h

Index: ash/test/ash_test_views_delegate.h
diff --git a/ash/test/ash_test_views_delegate.h b/ash/test/ash_test_views_delegate.h
index 9d711ecbce1425b83dfeb195a26c71e2825ddb66..1a23ea5dbfe5d6b5b9129b1cfba19ff2ebf3845e 100644
--- a/ash/test/ash_test_views_delegate.h
+++ b/ash/test/ash_test_views_delegate.h
@@ -16,13 +16,13 @@ namespace test {
 class AshTestViewsDelegate : public views::TestViewsDelegate {
  public:
   AshTestViewsDelegate();
-  virtual ~AshTestViewsDelegate();
+  ~AshTestViewsDelegate() override;
 
   // Overriden from TestViewsDelegate.
-  virtual content::WebContents* CreateWebContents(
+  content::WebContents* CreateWebContents(
       content::BrowserContext* browser_context,
       content::SiteInstance* site_instance) override;
-  virtual void OnBeforeWidgetInit(
+  void OnBeforeWidgetInit(
       views::Widget::InitParams* params,
       views::internal::NativeWidgetDelegate* delegate) override;