[chromeos] Wait for initial page load after login

chrome/browser/automation/automation_event_observers_chromeos.cc

Index: chrome/browser/automation/automation_event_observers_chromeos.cc
diff --git a/chrome/browser/automation/automation_event_observers_chromeos.cc b/chrome/browser/automation/automation_event_observers_chromeos.cc
index e3da47d840fa0fe762c7990afa36611169e63006..6d45d0054b41f1811097ae8a71573cebf8271b6e 100644
--- a/chrome/browser/automation/automation_event_observers_chromeos.cc
+++ b/chrome/browser/automation/automation_event_observers_chromeos.cc
@@ -5,6 +5,7 @@
 #include "chrome/browser/automation/automation_event_observers.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/login/existing_user_controller.h"
+#include "content/public/browser/notification_service.h"
 
 LoginEventObserver::LoginEventObserver(
     AutomationEventQueue* event_queue,
@@ -32,7 +33,19 @@ void LoginEventObserver::OnLoginSuccess(const std::string& username,
     automation_->set_profile(
         g_browser_process->profile_manager()->GetLastUsedProfile());
   }
-  _NotifyLoginEvent(std::string());
+  VLOG(1) << "Successfully logged in. Waiting for a page to load";
+  registrar_.Add(this, content::NOTIFICATION_LOAD_STOP,
+                 content::NotificationService::AllBrowserContextsAndSources());
+}
+
+void LoginEventObserver::Observe(
+    int type,
+    const content::NotificationSource& source,
+    const content::NotificationDetails& details) {
+  if (type == content::NOTIFICATION_LOAD_STOP) {
+    VLOG(1) << "Page load done.";
+    _NotifyLoginEvent(std::string());
+  }
 }
 
 void LoginEventObserver::_NotifyLoginEvent(const std::string& error_string) {