webRequest.onAuthRequired listeners can provide authentication credentials.

net/url_request/url_request_test_util.h

Index: net/url_request/url_request_test_util.h
diff --git a/net/url_request/url_request_test_util.h b/net/url_request/url_request_test_util.h
index cac7a72179a68516d87ec6858b66c5783dc57492..e390c5b069d75fde232d399b9fa5b251c1e01a52 100644
--- a/net/url_request/url_request_test_util.h
+++ b/net/url_request/url_request_test_util.h
@@ -207,8 +207,10 @@ class TestNetworkDelegate : public net::NetworkDelegate {
   virtual net::URLRequestJob* OnMaybeCreateURLRequestJob(
       net::URLRequest* request);
   virtual void OnPACScriptError(int line_number, const string16& error);
-  virtual void OnAuthRequired(net::URLRequest* request,
-                              const net::AuthChallengeInfo& auth_info);
+  virtual int OnAuthRequired(net::URLRequest* request,
+                             const net::AuthChallengeInfo& auth_info,
+                             net::CompletionCallback* callback,
+                             net::AuthCredentials* credentials);
 
   void InitRequestStatesIfNew(int request_id);