Update {virtual,override,final} to follow C++11 style in ui.

ui/chromeos/touch_exploration_controller.h

Index: ui/chromeos/touch_exploration_controller.h
diff --git a/ui/chromeos/touch_exploration_controller.h b/ui/chromeos/touch_exploration_controller.h
index 2f428a56a7d271fae0425cb19f02a2e45cb3bd91..ea46fd5647e9c5aef4067e6277aadf228070d421 100644
--- a/ui/chromeos/touch_exploration_controller.h
+++ b/ui/chromeos/touch_exploration_controller.h
@@ -169,17 +169,18 @@ class UI_CHROMEOS_EXPORT TouchExplorationController
   explicit TouchExplorationController(
       aura::Window* root_window,
       ui::TouchExplorationControllerDelegate* delegate);
-  virtual ~TouchExplorationController();
+  ~TouchExplorationController() override;
 
  private:
   friend class TouchExplorationControllerTestApi;
 
   // Overridden from ui::EventRewriter
-  virtual ui::EventRewriteStatus RewriteEvent(
+  ui::EventRewriteStatus RewriteEvent(
       const ui::Event& event,
       scoped_ptr<ui::Event>* rewritten_event) override;
-  virtual ui::EventRewriteStatus NextDispatchEvent(
-      const ui::Event& last_event, scoped_ptr<ui::Event>* new_event) override;
+  ui::EventRewriteStatus NextDispatchEvent(
+      const ui::Event& last_event,
+      scoped_ptr<ui::Event>* new_event) override;
 
   // Event handlers based on the current state - see State, below.
   ui::EventRewriteStatus InNoFingersDown(
@@ -235,7 +236,7 @@ class UI_CHROMEOS_EXPORT TouchExplorationController
   // the user moves fast enough to trigger a gesture. After the user
   // completes their gesture, this method will decide what keyboard
   // input their gesture corresponded to.
-  virtual void OnGestureEvent(ui::GestureEvent* gesture) override;
+  void OnGestureEvent(ui::GestureEvent* gesture) override;
 
   // Process the gesture events that have been created.
   void ProcessGestureEvents();