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

ash/test/shell_test_api.cc

Index: ash/test/shell_test_api.cc
diff --git a/ash/test/shell_test_api.cc b/ash/test/shell_test_api.cc
index 94d93e545fe07ad3048454d763c4619658e07697..c24fa1794b00c0e5d93cdb9a189e97a611f5d611 100644
--- a/ash/test/shell_test_api.cc
+++ b/ash/test/shell_test_api.cc
@@ -5,6 +5,7 @@
 #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"
 
@@ -69,5 +70,10 @@ 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