Standardize usage of virtual/override/final specifiers.

ash/ime/mode_indicator_view.h

Index: ash/ime/mode_indicator_view.h
diff --git a/ash/ime/mode_indicator_view.h b/ash/ime/mode_indicator_view.h
index b38997b8e0c4e2c2845a075485407376dbb95e2d..9e00ceb3b2122c67bee4be2fd57101a1e70364ee 100644
--- a/ash/ime/mode_indicator_view.h
+++ b/ash/ime/mode_indicator_view.h
@@ -25,20 +25,20 @@ class ASH_EXPORT ModeIndicatorView : public views::BubbleDelegateView {
   ModeIndicatorView(gfx::NativeView parent,
                     const gfx::Rect& cursor_bounds,
                     const base::string16& label);
-  virtual ~ModeIndicatorView();
+  ~ModeIndicatorView() override;
 
   // Show the mode indicator then hide with fading animation.
   void ShowAndFadeOut();
 
   // views::BubbleDelegateView override:
-  virtual gfx::Size GetPreferredSize() const override;
+  gfx::Size GetPreferredSize() const override;
 
  protected:
   // views::BubbleDelegateView override:
-  virtual void Init() override;
+  void Init() override;
 
   // views::WidgetDelegateView overrides:
-  virtual views::NonClientFrameView* CreateNonClientFrameView(
+  views::NonClientFrameView* CreateNonClientFrameView(
       views::Widget* widget) override;
 
  private: