Replace OVERRIDE and FINAL with override and final in content/public/[a-s]*

content/public/test/mock_download_item.h

Index: content/public/test/mock_download_item.h
diff --git a/content/public/test/mock_download_item.h b/content/public/test/mock_download_item.h
index f027a919550ef8bcd71542b648f999bba0a4b0be..19ebe62b5f8411be8b63626c87621f98e775a394 100644
--- a/content/public/test/mock_download_item.h
+++ b/content/public/test/mock_download_item.h
@@ -24,8 +24,8 @@ class MockDownloadItem : public DownloadItem {
   // Management of observer lists is common in tests. So Add/RemoveObserver
   // methods are not mocks. In addition, any registered observers will receive a
   // OnDownloadDestroyed() notification when the mock is destroyed.
-  virtual void AddObserver(Observer* observer) OVERRIDE;
-  virtual void RemoveObserver(Observer* observer) OVERRIDE;
+  virtual void AddObserver(Observer* observer) override;
+  virtual void RemoveObserver(Observer* observer) override;
 
   // Dispatches an OnDownloadOpened() notification to observers.
   void NotifyObserversDownloadOpened();