C++11 override style change for athena

athena/wm/window_manager_impl.cc

Index: athena/wm/window_manager_impl.cc
diff --git a/athena/wm/window_manager_impl.cc b/athena/wm/window_manager_impl.cc
index f0020c47bc14f2917b393ef529fa78e96819cb0a..ab2d7b6545069838dc7d7b1fa3715248ae91e3cf 100644
--- a/athena/wm/window_manager_impl.cc
+++ b/athena/wm/window_manager_impl.cc
@@ -45,17 +45,17 @@ void SetWindowState(aura::Window* window,
 class AthenaContainerLayoutManager : public aura::LayoutManager {
  public:
   AthenaContainerLayoutManager();
-  virtual ~AthenaContainerLayoutManager();
+  ~AthenaContainerLayoutManager() override;
 
  private:
   // aura::LayoutManager:
-  virtual void OnWindowResized() override;
-  virtual void OnWindowAddedToLayout(aura::Window* child) override;
-  virtual void OnWillRemoveWindowFromLayout(aura::Window* child) override;
-  virtual void OnWindowRemovedFromLayout(aura::Window* child) override;
-  virtual void OnChildWindowVisibilityChanged(aura::Window* child,
+  void OnWindowResized() override;
+  void OnWindowAddedToLayout(aura::Window* child) override;
+  void OnWillRemoveWindowFromLayout(aura::Window* child) override;
+  void OnWindowRemovedFromLayout(aura::Window* child) override;
+  void OnChildWindowVisibilityChanged(aura::Window* child,
                                               bool visible) override;
-  virtual void SetChildBounds(aura::Window* child,
+  void SetChildBounds(aura::Window* child,
                               const gfx::Rect& requested_bounds) override;
 
   DISALLOW_COPY_AND_ASSIGN(AthenaContainerLayoutManager);