Standardize usage of virtual/override/final specifiers.

ash/touch/touch_hud_projection.h

Index: ash/touch/touch_hud_projection.h
diff --git a/ash/touch/touch_hud_projection.h b/ash/touch/touch_hud_projection.h
index cde756d79c784b1ec3d39194b8d2498a8288b43a..239497624067fd1265377d27e77be3a8aaf3c01e 100644
--- a/ash/touch/touch_hud_projection.h
+++ b/ash/touch/touch_hud_projection.h
@@ -19,18 +19,17 @@ class TouchHudProjection : public TouchObserverHUD {
   explicit TouchHudProjection(aura::Window* initial_root);
 
   // Overriden from TouchObserverHUD.
-  virtual void Clear() override;
+  void Clear() override;
 
  private:
   friend class TouchHudProjectionTest;
 
-  virtual ~TouchHudProjection();
+  ~TouchHudProjection() override;
 
   // Overriden from TouchObserverHUD.
-  virtual void OnTouchEvent(ui::TouchEvent* event) override;
-  virtual void SetHudForRootWindowController(
-      RootWindowController* controller) override;
-  virtual void UnsetHudForRootWindowController(
+  void OnTouchEvent(ui::TouchEvent* event) override;
+  void SetHudForRootWindowController(RootWindowController* controller) override;
+  void UnsetHudForRootWindowController(
       RootWindowController* controller) override;
 
   std::map<int, TouchPointView*> points_;