Standardize usage of virtual/override/final in google_apis/

google_apis/gaia/mock_url_fetcher_factory.h

Index: google_apis/gaia/mock_url_fetcher_factory.h
diff --git a/google_apis/gaia/mock_url_fetcher_factory.h b/google_apis/gaia/mock_url_fetcher_factory.h
index ca61dc7b336e003e4aeff2eb496ba7a5389d7878..68e30aa63f927c21cdb3880a96e80a7ed70b6d74 100644
--- a/google_apis/gaia/mock_url_fetcher_factory.h
+++ b/google_apis/gaia/mock_url_fetcher_factory.h
@@ -31,9 +31,9 @@ class MockFetcher : public net::TestURLFetcher {
               net::URLFetcher::RequestType request_type,
               net::URLFetcherDelegate* d);
 
-  virtual ~MockFetcher();
+  ~MockFetcher() override;
 
-  virtual void Start() override;
+  void Start() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MockFetcher);