webRequest.onAuthRequired listeners can provide authentication credentials.

net/base/network_delegate.h

Index: net/base/network_delegate.h
diff --git a/net/base/network_delegate.h b/net/base/network_delegate.h
index 2506788c548ba1296e673381f2798ec492913cc7..93833aced826f074e5e1ca7691dff315c1c58739 100644
--- a/net/base/network_delegate.h
+++ b/net/base/network_delegate.h
@@ -25,6 +25,7 @@ namespace net {
 // of net/base here, because we have a net_base library. Forward declarations
 // are ok.
 class AuthChallengeInfo;
+class AuthCredentials;
 class HostPortPair;
 class HttpRequestHeaders;
 class URLRequest;
@@ -53,8 +54,10 @@ class NetworkDelegate : public base::NonThreadSafe {
   void NotifyCompleted(URLRequest* request);
   void NotifyURLRequestDestroyed(URLRequest* request);
   void NotifyPACScriptError(int line_number, const string16& error);
-  void NotifyAuthRequired(URLRequest* request,
-                          const AuthChallengeInfo& auth_info);
+  int NotifyAuthRequired(URLRequest* request,
+                         const AuthChallengeInfo& auth_info,
+                         CompletionCallback* callback,
+                         AuthCredentials* credentials);
 
  private:
   // This is the interface for subclasses of NetworkDelegate to implement. This
@@ -104,8 +107,10 @@ class NetworkDelegate : public base::NonThreadSafe {
   virtual void OnPACScriptError(int line_number, const string16& error) = 0;
 
   // Corresponds to URLRequest::Delegate::OnAuthRequired.
-  virtual void OnAuthRequired(URLRequest* reqest,
-                              const AuthChallengeInfo& auth_info) = 0;
+  virtual int OnAuthRequired(URLRequest* reqest,
+                             const AuthChallengeInfo& auth_info,
+                             CompletionCallback* callback,
+                             AuthCredentials* credentials) = 0;
 };
 
 }  // namespace net