replace OVERRIDE and FINAL with override and final in ash/

ash/system/user/button_from_view.h

Index: ash/system/user/button_from_view.h
diff --git a/ash/system/user/button_from_view.h b/ash/system/user/button_from_view.h
index 23a632b1defdef2ecf57a4d11fb37863f753cdf0..e941c1ee13923030a1ebd0611869853b78f6129b 100644
--- a/ash/system/user/button_from_view.h
+++ b/ash/system/user/button_from_view.h
@@ -31,11 +31,11 @@ class ButtonFromView : public views::CustomButton {
   void ForceBorderVisible(bool show);
 
   // Overridden from views::View
-  virtual void OnMouseEntered(const ui::MouseEvent& event) OVERRIDE;
-  virtual void OnMouseExited(const ui::MouseEvent& event) OVERRIDE;
-  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
-  virtual void OnFocus() OVERRIDE;
-  virtual void OnBlur() OVERRIDE;
+  virtual void OnMouseEntered(const ui::MouseEvent& event) override;
+  virtual void OnMouseExited(const ui::MouseEvent& event) override;
+  virtual void OnPaint(gfx::Canvas* canvas) override;
+  virtual void OnFocus() override;
+  virtual void OnBlur() override;
 
   // Check if the item is hovered.
   bool is_hovered_for_test() { return button_hovered_; }