Files.app: Treats HTTP_FORBIDDEN (403) as temporary error on authentication.

google_apis/gaia/oauth2_access_token_fetcher.cc

Index: google_apis/gaia/oauth2_access_token_fetcher.cc
diff --git a/google_apis/gaia/oauth2_access_token_fetcher.cc b/google_apis/gaia/oauth2_access_token_fetcher.cc
index edefa7e33bde8b26e7ddd97e6280bcd6b6667ef4..731dab8127817326918512cc5438df4319bfe24c 100644
--- a/google_apis/gaia/oauth2_access_token_fetcher.cc
+++ b/google_apis/gaia/oauth2_access_token_fetcher.cc
@@ -129,6 +129,15 @@ void OAuth2AccessTokenFetcher::EndGetAccessToken(
     return;
   }
 
+  // HTTP_FORBIDDEN (403) is treated as temporary error, because it may be
+  // '403 Rate Limit Exeeded.'
+  if (source->GetResponseCode() == net::HTTP_FORBIDDEN) {
+    OnGetTokenFailure(GoogleServiceAuthError(
+        GoogleServiceAuthError::SERVICE_UNAVAILABLE));
+    return;
+  }
+
+  // The other errors are treated as permanent error.
   if (source->GetResponseCode() != net::HTTP_OK) {
     OnGetTokenFailure(GoogleServiceAuthError(
         GoogleServiceAuthError::INVALID_GAIA_CREDENTIALS));