A11y: Add the option to always show the a11y tray menu regardless of the state of a11y features

ash/test/test_shell_delegate.cc

Index: ash/test/test_shell_delegate.cc
diff --git a/ash/test/test_shell_delegate.cc b/ash/test/test_shell_delegate.cc
index e3aac464b1ddcbcb2fed66c17444e06a69e38955..89d117a2bdba95e6a735b1f3ae9e2adce5ca711c 100644
--- a/ash/test/test_shell_delegate.cc
+++ b/ash/test/test_shell_delegate.cc
@@ -33,7 +33,7 @@ TestShellDelegate::TestShellDelegate()
 TestShellDelegate::~TestShellDelegate() {
 }
 
-bool TestShellDelegate::IsUserLoggedIn() {
+bool TestShellDelegate::IsUserLoggedIn() const {
   return user_logged_in_;
 }