Standardize usage of virtual/override/final specifiers.

ash/test/child_modal_window.h

Index: ash/test/child_modal_window.h
diff --git a/ash/test/child_modal_window.h b/ash/test/child_modal_window.h
index 5521b4f7c3236e2eb65f12c57439bbb50f39fd09..f0c6f014adf85cf90009edebde049b40a6265fb2 100644
--- a/ash/test/child_modal_window.h
+++ b/ash/test/child_modal_window.h
@@ -27,7 +27,7 @@ class ChildModalParent : public views::WidgetDelegateView,
                          public views::WidgetObserver {
  public:
   ChildModalParent(gfx::NativeView context);
-  virtual ~ChildModalParent();
+  ~ChildModalParent() override;
 
   void ShowChild();
   gfx::NativeWindow GetModalParent() const;
@@ -37,22 +37,21 @@ class ChildModalParent : public views::WidgetDelegateView,
   views::Widget* CreateChild();
 
   // Overridden from views::WidgetDelegate:
-  virtual View* GetContentsView() override;
-  virtual base::string16 GetWindowTitle() const override;
-  virtual bool CanResize() const override;
-  virtual void DeleteDelegate() override;
+  View* GetContentsView() override;
+  base::string16 GetWindowTitle() const override;
+  bool CanResize() const override;
+  void DeleteDelegate() override;
 
   // Overridden from views::View:
-  virtual void Layout() override;
-  virtual void ViewHierarchyChanged(
+  void Layout() override;
+  void ViewHierarchyChanged(
       const ViewHierarchyChangedDetails& details) override;
 
   // Overridden from ButtonListener:
-  virtual void ButtonPressed(views::Button* sender,
-                             const ui::Event& event) override;
+  void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
   // Overridden from WidgetObserver:
-  virtual void OnWidgetDestroying(views::Widget* widget) override;
+  void OnWidgetDestroying(views::Widget* widget) override;
 
   // The button to toggle showing and hiding the child window. The child window
   // does not block input to this button.