Add PyAuto test for DeviceGuestModeEnabled policy

chrome/browser/automation/automation_provider_observers_chromeos.cc

Index: chrome/browser/automation/automation_provider_observers_chromeos.cc
diff --git a/chrome/browser/automation/automation_provider_observers_chromeos.cc b/chrome/browser/automation/automation_provider_observers_chromeos.cc
index ead07cbf90d4fa253ec0a41e64c956a118bbbae0..33c8a2f2fe48ee346881c21606418ab1d206b962 100644
--- a/chrome/browser/automation/automation_provider_observers_chromeos.cc
+++ b/chrome/browser/automation/automation_provider_observers_chromeos.cc
@@ -53,16 +53,16 @@ LoginWebuiReadyObserver::LoginWebuiReadyObserver(
     : automation_(automation->AsWeakPtr()) {
   registrar_.Add(this, chrome::NOTIFICATION_LOGIN_WEBUI_READY,
                  content::NotificationService::AllSources());
-}
-
-LoginWebuiReadyObserver::~LoginWebuiReadyObserver() {
+  registrar_.Add(this, chrome::NOTIFICATION_ACCOUNT_PICKER_WEBUI_READY,

[Nikita (slow), 2012/05/16 15:56:13]

Should add these instead:
NOTIFICATION_LOGIN_USER_IMAGES_LOADED
NOTIFICATION_WIZARD_FIRST_SCREEN_SHOWN

http://code.google.com/codesearch#OAMlx_jo-ck/src/chrome/browser/chromeos/log...

[bartfab (slow), 2012/05/16 18:07:10]

Thanks. I had seen that code but did not realize that these are the four
notifications that a browser start into the login manager can end with. Done.

+                 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_ACCOUNT_PICKER_WEBUI_READY);
   if (automation_)
     automation_->OnLoginWebuiReady();
   delete this;