replace OVERRIDE and FINAL with override and final in ash/

ash/test/ash_test_base.cc

Index: ash/test/ash_test_base.cc
diff --git a/ash/test/ash_test_base.cc b/ash/test/ash_test_base.cc
index e6ddbcf5f302a7300ede819a2203514d394afc8b..50d18b7b1dc73e26fdeb4f2f3aafb375bec1b75e 100644
--- a/ash/test/ash_test_base.cc
+++ b/ash/test/ash_test_base.cc
@@ -63,7 +63,7 @@ class AshEventGeneratorDelegate
 
   // aura::test::EventGeneratorDelegateAura overrides:
   virtual aura::WindowTreeHost* GetHostAt(
-      const gfx::Point& point_in_screen) const OVERRIDE {
+      const gfx::Point& point_in_screen) const override {
     gfx::Screen* screen = Shell::GetScreen();
     gfx::Display display = screen->GetDisplayNearestPoint(point_in_screen);
     return Shell::GetInstance()->display_controller()->
@@ -71,7 +71,7 @@ class AshEventGeneratorDelegate
   }
 
   virtual aura::client::ScreenPositionClient* GetScreenPositionClient(
-      const aura::Window* window) const OVERRIDE {
+      const aura::Window* window) const override {
     return aura::client::GetScreenPositionClient(window->GetRootWindow());
   }