Added support for multiple parameters to Extension API callbacks.

chrome/browser/extensions/extension_chrome_auth_private_api.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/extension_chrome_auth_private_api.h"
 
 #include <string>
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/printing/cloud_print/cloud_print_proxy_service.h"
@@ skipping 16 matching lines @@
   std::string user_email;
   EXTENSION_FUNCTION_VALIDATE(args_->GetString(0, &user_email));
   std::string robot_email;
   EXTENSION_FUNCTION_VALIDATE(args_->GetString(1, &robot_email));
   std::string credentials;
   EXTENSION_FUNCTION_VALIDATE(args_->GetString(2, &credentials));
   if (test_mode) {
     std::string test_response = user_email;
     test_response.append(robot_email);
     test_response.append(credentials);
-    result_.reset(Value::CreateStringValue(test_response));
+    SetResult(Value::CreateStringValue(test_response));
   } else {
     CloudPrintProxyServiceFactory::GetForProfile(profile_)->
         EnableForUserWithRobot(credentials, robot_email, user_email);
   }
   SendResponse(true);
   return true;
 }
 
 // static
 void SetCloudPrintCredentialsFunction::SetTestMode(bool test_mode_enabled) {
   test_mode = test_mode_enabled;
 }