Providing more information on why certain users can't be added to multi-profile

ash/test/test_session_state_delegate.cc

Index: ash/test/test_session_state_delegate.cc
diff --git a/ash/test/test_session_state_delegate.cc b/ash/test/test_session_state_delegate.cc
index 4c7614341ee324be21d8929f38753d143ea67a87..eac5576997fe62cd2aad553ff7b3d06881f79e25 100644
--- a/ash/test/test_session_state_delegate.cc
+++ b/ash/test/test_session_state_delegate.cc
@@ -227,6 +227,11 @@ void TestSessionStateDelegate::CycleActiveUser(CycleUser cycle_user) {
   SwitchActiveUser("someone@tray");
 }
 
+bool TestSessionStateDelegate::IsMultiProfileAllowedByPrimaryUserPolicy()
+    const {
+  return true;
+}
+
 void TestSessionStateDelegate::AddSessionStateObserver(
     SessionStateObserver* observer) {
 }