Tray elements behave appropriately on the multiple signin screen (more like lock screen)

ash/test/shell_test_api.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 "ash/test/shell_test_api.h"
 
 #include "ash/root_window_controller.h"
+#include "ash/session/session_state_delegate.h"
 #include "ash/shelf/shelf_delegate.h"
 #include "ash/shell.h"
 
 #if defined(OS_CHROMEOS)
 #include "ash/display/display_configurator_animation.h"
 #include "ui/display/chromeos/display_configurator.h"
 #endif
 
 namespace ash {
 namespace test {
@@ skipping 44 matching lines @@
         shell_->display_configurator_animation_.get());
     shell_->display_configurator_animation_.reset();
   }
 #endif  // defined(OS_CHROMEOS)
 }
 
 void ShellTestApi::SetShelfDelegate(ShelfDelegate* delegate) {
   shell_->shelf_delegate_.reset(delegate);
 }
 
+void ShellTestApi::SetSessionStateDelegate(
+    SessionStateDelegate* session_state_delegate) {
+  shell_->session_state_delegate_.reset(session_state_delegate);
+}
+
 }  // namespace test
 }  // namespace ash