Standardize usage of virtual/override/final in google_apis/

google_apis/gcm/engine/registration_request.h

Index: google_apis/gcm/engine/registration_request.h
diff --git a/google_apis/gcm/engine/registration_request.h b/google_apis/gcm/engine/registration_request.h
index 736f4b447a7ad2b9357175189fe78dd8caac61ff..1f707b9dd9ee276fd6ddb34609f8f4ddc9fb9595 100644
--- a/google_apis/gcm/engine/registration_request.h
+++ b/google_apis/gcm/engine/registration_request.h
@@ -89,12 +89,12 @@ class GCM_EXPORT RegistrationRequest : public net::URLFetcherDelegate {
       int max_retry_count,
       scoped_refptr<net::URLRequestContextGetter> request_context_getter,
       GCMStatsRecorder* recorder);
-  virtual ~RegistrationRequest();
+  ~RegistrationRequest() override;
 
   void Start();
 
   // URLFetcherDelegate implementation.
-  virtual void OnURLFetchComplete(const net::URLFetcher* source) override;
+  void OnURLFetchComplete(const net::URLFetcher* source) override;
 
  private:
   // Schedules a retry attempt, informs the backoff of a previous request's