Add PyAuto test for DeviceGuestModeEnabled policy

chrome/browser/automation/automation_provider_observers_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/automation_provider_observers.h"
 
 #include "base/values.h"
 #include "chrome/browser/automation/automation_provider.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
 #include "chrome/browser/chromeos/login/authentication_notification_details.h"
@@ skipping 30 matching lines @@
 }
 
 void NetworkManagerInitObserver::OnNetworkManagerChanged(NetworkLibrary* obj) {
   if (!obj->wifi_scanning()) {
     if (automation_)
       automation_->OnNetworkLibraryInit();
     delete this;
   }
 }
 
-LoginWebuiReadyObserver::LoginWebuiReadyObserver(
-    AutomationProvider* automation)
+LoginWebuiReadyObserver::LoginWebuiReadyObserver(AutomationProvider* automation)
     : automation_(automation->AsWeakPtr()) {
   registrar_.Add(this, chrome::NOTIFICATION_LOGIN_WEBUI_READY,
                  content::NotificationService::AllSources());
-}
-
-LoginWebuiReadyObserver::~LoginWebuiReadyObserver() {
+  registrar_.Add(this, chrome::NOTIFICATION_LOGIN_USER_IMAGES_LOADED,
+                 content::NotificationService::AllSources());
+  registrar_.Add(this, chrome::NOTIFICATION_LOGIN_NETWORK_ERROR_SHOWN,

[Nirnimesh, 2012/05/16 19:48:26]

When is this raised?
It takes a while for the login dialog to show up, and the network error screen 
before that for a few seconds. Is that it?

[Nikita (slow), 2012/05/22 11:09:16]

Yes, it is that one. So in that case you'll see
NOTIFICATION_LOGIN_NETWORK_ERROR_SHOWN then
NOTIFICATION_LOGIN_WEBUI_READY

Now I've realized that for the purposes of autotest we probably don't want to
treat that as "LoginWebuiReady" as it is not ready but in fact in some error or
temporary (while network is connecting) state.

Sorry for confusion.

+                 content::NotificationService::AllSources());
+  registrar_.Add(this, chrome::NOTIFICATION_WIZARD_FIRST_SCREEN_SHOWN,
+                 content::NotificationService::AllSources());
 }
 
 void LoginWebuiReadyObserver::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
-  DCHECK(type == chrome::NOTIFICATION_LOGIN_WEBUI_READY);
+  DCHECK(type == chrome::NOTIFICATION_LOGIN_WEBUI_READY ||
+         type == chrome::NOTIFICATION_LOGIN_USER_IMAGES_LOADED ||
+         type == chrome::NOTIFICATION_LOGIN_NETWORK_ERROR_SHOWN ||
+         type == chrome::NOTIFICATION_WIZARD_FIRST_SCREEN_SHOWN);
   if (automation_)
     automation_->OnLoginWebuiReady();
   delete this;
 }
 
 LoginObserver::LoginObserver(chromeos::ExistingUserController* controller,
                              AutomationProvider* automation,
                              IPC::Message* reply_message)
     : controller_(controller),
       automation_(automation->AsWeakPtr()),
@@ skipping 377 matching lines @@
 
 void PhotoCaptureObserver::LocalStateChanged(
     chromeos::UserManager* user_manager) {
   user_manager->RemoveObserver(this);
   if (automation_) {
     AutomationJSONReply(
         automation_, reply_message_.release()).SendSuccess(NULL);
   }
   delete this;
 }