Fix to enable the cached credentials login test

chrome/browser/automation/testing_automation_provider_chromeos.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/automation/testing_automation_provider.h"
 
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "base/command_line.h"
@@ skipping 343 matching lines @@
   // Return immediately, since we're going to die before the login is finished.
   AutomationJSONReply(this, reply_message).SendSuccess(NULL);
   controller->LoginAsGuest();
 }
 
 void TestingAutomationProvider::SubmitLoginForm(DictionaryValue* args,
                                                 IPC::Message* reply_message) {
   AutomationJSONReply reply(this, reply_message);
 
   std::string username, password;
+  bool use_cached_credentials;
   if (!args->GetString("username", &username) ||
-      !args->GetString("password", &password)) {
+      !args->GetString("password", &password) ||
+      !args->GetBoolean("use_cached_credentials", &use_cached_credentials)) {
     reply.SendError("Invalid or missing args.");
     return;
   }
 
   chromeos::ExistingUserController* controller =
       chromeos::ExistingUserController::current_controller();
   if (!controller) {
     reply.SendError("Unable to access ExistingUserController");
     return;
   }
 
   // WebUI login.
   chromeos::WebUILoginDisplay* webui_login_display =
       static_cast<chromeos::WebUILoginDisplay*>(controller->login_display());
   VLOG(2) << "TestingAutomationProvider::SubmitLoginForm "
           << "ShowSigninScreenForCreds(" << username << ", " << password << ")";
 
-  webui_login_display->ShowSigninScreenForCreds(username, password);
+  if (use_cached_credentials) {
+    webui_login_display->Login(username, password);
+  } else {
+    webui_login_display->ShowSigninScreenForCreds(username, password);
+  }
   reply.SendSuccess(NULL);
 }
 
 void TestingAutomationProvider::AddLoginEventObserver(
     DictionaryValue* args, IPC::Message* reply_message) {
   ExistingUserController* controller =
       ExistingUserController::current_controller();
   AutomationJSONReply reply(this, reply_message);
   if (!controller) {
     // This may happen due to SkipToLogin not being called.
@@ skipping 1118 matching lines @@
   chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
       AddObserver(power_manager_observer_);
 }
 
 void TestingAutomationProvider::RemoveChromeosObservers() {
   chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
       RemoveObserver(power_manager_observer_);
   delete power_manager_observer_;
   power_manager_observer_ = NULL;
 }