Standardize usage of virtual/override/final specifiers.

ash/frame/default_header_painter.h

Index: ash/frame/default_header_painter.h
diff --git a/ash/frame/default_header_painter.h b/ash/frame/default_header_painter.h
index 63ee6465c59411af182530d75a6a4c855f16abdc..4c875c04978cc4d65fa992f27a85c4eb318918fd 100644
--- a/ash/frame/default_header_painter.h
+++ b/ash/frame/default_header_painter.h
@@ -32,7 +32,7 @@ class ASH_EXPORT DefaultHeaderPainter : public HeaderPainter,
                                         public gfx::AnimationDelegate {
  public:
   DefaultHeaderPainter();
-  virtual ~DefaultHeaderPainter();
+  ~DefaultHeaderPainter() override;
 
   // DefaultHeaderPainter does not take ownership of any of the parameters.
   void Init(views::Widget* frame,
@@ -40,13 +40,13 @@ class ASH_EXPORT DefaultHeaderPainter : public HeaderPainter,
             FrameCaptionButtonContainerView* caption_button_container);
 
   // HeaderPainter overrides:
-  virtual int GetMinimumHeaderWidth() const override;
-  virtual void PaintHeader(gfx::Canvas* canvas, Mode mode) override;
-  virtual void LayoutHeader() override;
-  virtual int GetHeaderHeightForPainting() const override;
-  virtual void SetHeaderHeightForPainting(int height) override;
-  virtual void SchedulePaintForTitle() override;
-  virtual void UpdateLeftViewXInset(int left_view_x_inset) override;
+  int GetMinimumHeaderWidth() const override;
+  void PaintHeader(gfx::Canvas* canvas, Mode mode) override;
+  void LayoutHeader() override;
+  int GetHeaderHeightForPainting() const override;
+  void SetHeaderHeightForPainting(int height) override;
+  void SchedulePaintForTitle() override;
+  void UpdateLeftViewXInset(int left_view_x_inset) override;
 
   // Sets the left header view for the header. Passing NULL removes the view.
   void UpdateLeftHeaderView(views::View* left_header_view);
@@ -59,7 +59,7 @@ class ASH_EXPORT DefaultHeaderPainter : public HeaderPainter,
   FRIEND_TEST_ALL_PREFIXES(DefaultHeaderPainterTest, TitleIconAlignment);
 
   // gfx::AnimationDelegate override:
-  virtual void AnimationProgressed(const gfx::Animation* animation) override;
+  void AnimationProgressed(const gfx::Animation* animation) override;
 
   // Paints highlight around the edge of the header for inactive restored
   // windows.