Created optional multiprofiles introduction dialog.

chrome/browser/chromeos/system/ash_system_tray_delegate.cc

Index: chrome/browser/chromeos/system/ash_system_tray_delegate.cc
diff --git a/chrome/browser/chromeos/system/ash_system_tray_delegate.cc b/chrome/browser/chromeos/system/ash_system_tray_delegate.cc
index 5a49a4dadfd9a04de98a879194be14a14295badd..008c4c69c5ed628e84e0c67900b4238efc021aaa 100644
--- a/chrome/browser/chromeos/system/ash_system_tray_delegate.cc
+++ b/chrome/browser/chromeos/system/ash_system_tray_delegate.cc
@@ -65,6 +65,7 @@
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/chromeos/options/network_config_view.h"
 #include "chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h"
+#include "chrome/browser/chromeos/profiles/multiprofiles_intro_view.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
 #include "chrome/browser/chromeos/sim_dialog_delegate.h"
 #include "chrome/browser/chromeos/system_key_event_listener.h"
@@ -629,8 +630,14 @@ class SystemTrayDelegate : public ash::SystemTrayDelegate,
       return;
 
     // Launch sign in screen to add another user to current session.
-    if (UserManager::Get()->GetUsersAdmittedForMultiProfile().size())
-      UserAddingScreen::Get()->Start();
+    if (UserManager::Get()->GetUsersAdmittedForMultiProfile().size()) {
+      bool show_intro = !ProfileManager::GetActiveUserProfile()->
+          GetPrefs()->GetBoolean(prefs::kMultiProfileIntroShowDismissed);
+      if (show_intro)
+        multiprofiles::IntroDialog();
+      else
+        UserAddingScreen::Get()->Start();
+    }
   }
 
   virtual void ShowSpringChargerReplacementDialog() OVERRIDE {