replace OVERRIDE and FINAL with override and final in ash/

ash/shelf/shelf_window_watcher_unittest.cc

Index: ash/shelf/shelf_window_watcher_unittest.cc
diff --git a/ash/shelf/shelf_window_watcher_unittest.cc b/ash/shelf/shelf_window_watcher_unittest.cc
index 588db3b4bcdac7b2f4e3d303988b426c0da92b28..c5d1b728b8a9b2a9d8c0013c593e2aa70779619e 100644
--- a/ash/shelf/shelf_window_watcher_unittest.cc
+++ b/ash/shelf/shelf_window_watcher_unittest.cc
@@ -27,12 +27,12 @@ class ShelfWindowWatcherTest : public test::AshTestBase {
   ShelfWindowWatcherTest() : model_(NULL) {}
   virtual ~ShelfWindowWatcherTest() {}
 
-  virtual void SetUp() OVERRIDE {
+  virtual void SetUp() override {
     test::AshTestBase::SetUp();
     model_ = test::ShellTestApi(Shell::GetInstance()).shelf_model();
   }
 
-  virtual void TearDown() OVERRIDE {
+  virtual void TearDown() override {
     model_ = NULL;
     test::AshTestBase::TearDown();
   }