Refactor blocking network delegates

net/url_request/url_request_test_util.cc

Index: net/url_request/url_request_test_util.cc
diff --git a/net/url_request/url_request_test_util.cc b/net/url_request/url_request_test_util.cc
index 822cecc8768e0099c5255de9070f6521750c8cd9..eabdbd7325a0b9670dcf10697f64b13ad13534ee 100644
--- a/net/url_request/url_request_test_util.cc
+++ b/net/url_request/url_request_test_util.cc
@@ -455,7 +455,8 @@ net::NetworkDelegate::AuthRequiredResponse TestNetworkDelegate::OnAuthRequired(
       kStageHeadersReceived |  // Request canceled by delegate simulates empty
                                // response.
       kStageResponseStarted |  // data: URLs do not trigger sending headers
-      kStageBeforeRedirect;  // a delegate can trigger a redirection
+      kStageBeforeRedirect |   // a delegate can trigger a redirection
+      kStageCompletedError;    // request cancelled before callback
   return net::NetworkDelegate::AUTH_REQUIRED_RESPONSE_NO_ACTION;
 }