Standardize usage of virtual/override/final specifiers.

ash/wm/default_window_resizer.h

Index: ash/wm/default_window_resizer.h
diff --git a/ash/wm/default_window_resizer.h b/ash/wm/default_window_resizer.h
index 49c701742a481e467aac69fb41be6d1711acbc61..3f7537e376f0d29e93a1fb35c8d30426e55b5577 100644
--- a/ash/wm/default_window_resizer.h
+++ b/ash/wm/default_window_resizer.h
@@ -15,7 +15,7 @@ namespace ash {
 // windows coordiantes.
 class ASH_EXPORT DefaultWindowResizer : public WindowResizer {
  public:
-  virtual ~DefaultWindowResizer();
+  ~DefaultWindowResizer() override;
 
   // Creates a new DefaultWindowResizer. The caller takes ownership of the
   // returned object.
@@ -29,9 +29,9 @@ class ASH_EXPORT DefaultWindowResizer : public WindowResizer {
   }
 
   // WindowResizer:
-  virtual void Drag(const gfx::Point& location, int event_flags) override;
-  virtual void CompleteDrag() override;
-  virtual void RevertDrag() override;
+  void Drag(const gfx::Point& location, int event_flags) override;
+  void CompleteDrag() override;
+  void RevertDrag() override;
 
  private:
   explicit DefaultWindowResizer(wm::WindowState* window_state);