replace OVERRIDE and FINAL with override and final in athena/

athena/wm/overview_toolbar.cc

Index: athena/wm/overview_toolbar.cc
diff --git a/athena/wm/overview_toolbar.cc b/athena/wm/overview_toolbar.cc
index 1b55c2a29752ad3971fd107254ba94ab9bde4a44..abd08487c1980cca1318c2a6d45910bc92463066 100644
--- a/athena/wm/overview_toolbar.cc
+++ b/athena/wm/overview_toolbar.cc
@@ -64,7 +64,7 @@ class ActionButton : public ui::LayerDelegate {
   }
 
   // ui::LayerDelegate:
-  virtual void OnPaintLayer(gfx::Canvas* canvas) OVERRIDE {
+  virtual void OnPaintLayer(gfx::Canvas* canvas) override {
     ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
     canvas->DrawImageInt(*bundle.GetImageSkiaNamed(resource_id_), 0, 0);
     gfx::ShadowValues shadow;
@@ -83,10 +83,10 @@ class ActionButton : public ui::LayerDelegate {
   }
 
   virtual void OnDelegatedFrameDamage(
-      const gfx::Rect& damage_rect_in_dip) OVERRIDE {}
+      const gfx::Rect& damage_rect_in_dip) override {}
 
-  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE {}
-  virtual base::Closure PrepareForLayerBoundsChange() OVERRIDE {
+  virtual void OnDeviceScaleFactorChanged(float device_scale_factor) override {}
+  virtual base::Closure PrepareForLayerBoundsChange() override {
     return base::Closure();
   }