Improve GaiaAuthFetcher's API for its subclasses.

google_apis/gaia/gaia_auth_fetcher.h

Index: google_apis/gaia/gaia_auth_fetcher.h
diff --git a/google_apis/gaia/gaia_auth_fetcher.h b/google_apis/gaia/gaia_auth_fetcher.h
index 8910cfd6a10a42d620063c507dcaf61d6133498f..163db748f73c3fd160c497b858cbfa3de3ff0313 100644
--- a/google_apis/gaia/gaia_auth_fetcher.h
+++ b/google_apis/gaia/gaia_auth_fetcher.h
@@ -224,7 +224,7 @@ class GaiaAuthFetcher : public net::URLFetcherDelegate {
   bool HasPendingFetch();
 
   // Stop any URL fetches in progress.
-  void CancelRequest();
+  virtual void CancelRequest();
 
   // From a URLFetcher result, generate an appropriate error.
   // From the API documentation, both IssueAuthToken and ClientLogin have
@@ -255,6 +255,8 @@ class GaiaAuthFetcher : public net::URLFetcherDelegate {
                               const net::URLRequestStatus& status,
                               int response_code);
 
+  void SetPendingFetch(bool pending_fetch);
+
  private:
   // ClientLogin body constants that don't change
   static const char kCookiePersistence[];