mash: Update LoginStatus with session state updates

ash/common/wm_shell.cc

Index: ash/common/wm_shell.cc
diff --git a/ash/common/wm_shell.cc b/ash/common/wm_shell.cc
index a9b44633f32e323e32530557ea88302b0ed5a957..08ef8c000944ce10b6e043f84a5d5e4cf19b86a6 100644
--- a/ash/common/wm_shell.cc
+++ b/ash/common/wm_shell.cc
@@ -303,6 +303,13 @@ void WmShell::SessionStateChanged(session_manager::SessionState state) {
   // multiple times (e.g. initial login vs. multiprofile add session).
   if (state == session_manager::SessionState::ACTIVE)
     CreateShelfView();
+
+  // Only trigger an update in mash because with classic ash chrome calls
+  // UpdateAfterLoginStatusChange() directly.
+  if (IsRunningInMash()) {
+    // TODO(jamescook): Should this call Shell::OnLoginStatusChanged() too?
+    UpdateAfterLoginStatusChange(session_controller_->GetLoginStatus());
+  }
 }
 
 }  // namespace ash