webRequest.onAuthRequired listeners can provide authentication credentials.

net/base/network_delegate.cc

Index: net/base/network_delegate.cc
diff --git a/net/base/network_delegate.cc b/net/base/network_delegate.cc
index 28d0b318702c8444be751c194603f2b81473d3f3..0c7b4151c359d40d9717cd5fa36dbade644dfc8d 100644
--- a/net/base/network_delegate.cc
+++ b/net/base/network_delegate.cc
@@ -69,10 +69,12 @@ void NetworkDelegate::NotifyPACScriptError(int line_number,
   OnPACScriptError(line_number, error);
 }
 
-void NetworkDelegate::NotifyAuthRequired(URLRequest* request,
-                                         const AuthChallengeInfo& auth_info) {
+int NetworkDelegate::NotifyAuthRequired(URLRequest* request,
+                                        const AuthChallengeInfo& auth_info,
+                                        CompletionCallback* callback,
+                                        AuthCredentials* credentials) {
   DCHECK(CalledOnValidThread());
-  OnAuthRequired(request, auth_info);
+  return OnAuthRequired(request, auth_info, callback, credentials);
 }
 
 }  // namespace net