replace OVERRIDE and FINAL with override and final in ash/

ash/shelf/shelf_model_unittest.cc

Index: ash/shelf/shelf_model_unittest.cc
diff --git a/ash/shelf/shelf_model_unittest.cc b/ash/shelf/shelf_model_unittest.cc
index 817f2010ef92a03db5849b077451ec2668dfd3f3..d430bfbe6d0d7c213ed15f98c45574bf8f14bcc2 100644
--- a/ash/shelf/shelf_model_unittest.cc
+++ b/ash/shelf/shelf_model_unittest.cc
@@ -40,20 +40,20 @@ class TestShelfModelObserver : public ShelfModelObserver {
   }
 
   // ShelfModelObserver overrides:
-  virtual void ShelfItemAdded(int index) OVERRIDE {
+  virtual void ShelfItemAdded(int index) override {
     added_count_++;
   }
-  virtual void ShelfItemRemoved(int index, ShelfID id) OVERRIDE {
+  virtual void ShelfItemRemoved(int index, ShelfID id) override {
     removed_count_++;
   }
   virtual void ShelfItemChanged(int index,
-                                const ShelfItem& old_item) OVERRIDE {
+                                const ShelfItem& old_item) override {
     changed_count_++;
   }
-  virtual void ShelfItemMoved(int start_index, int target_index) OVERRIDE {
+  virtual void ShelfItemMoved(int start_index, int target_index) override {
     moved_count_++;
   }
-  virtual void ShelfStatusChanged() OVERRIDE {
+  virtual void ShelfStatusChanged() override {
   }
 
  private: