Improve GaiaAuthFetcher's API for its subclasses.

google_apis/gaia/gaia_auth_fetcher.cc

Index: google_apis/gaia/gaia_auth_fetcher.cc
diff --git a/google_apis/gaia/gaia_auth_fetcher.cc b/google_apis/gaia/gaia_auth_fetcher.cc
index 42134bb5d4c475dec8b8b3c548d5c1d716fb48ec..eaae7159fdb3cb0d746273a12080109cc0099d56 100644
--- a/google_apis/gaia/gaia_auth_fetcher.cc
+++ b/google_apis/gaia/gaia_auth_fetcher.cc
@@ -224,6 +224,10 @@ bool GaiaAuthFetcher::HasPendingFetch() {
   return fetch_pending_;
 }
 
+void GaiaAuthFetcher::SetPendingFetch(bool pending_fetch) {
+  fetch_pending_ = pending_fetch;
+}
+
 void GaiaAuthFetcher::CancelRequest() {
   fetcher_.reset();
   fetch_pending_ = false;