Restructure login

ui/views/mus/window_manager_connection.cc

Index: ui/views/mus/window_manager_connection.cc
diff --git a/ui/views/mus/window_manager_connection.cc b/ui/views/mus/window_manager_connection.cc
index a7841fd470089b3379137d2c534d65dbe29a82f2..8b6398a3f15bea231362d3b064a6b1bd4a77daac 100644
--- a/ui/views/mus/window_manager_connection.cc
+++ b/ui/views/mus/window_manager_connection.cc
@@ -44,6 +44,11 @@ WindowManagerConnection* WindowManagerConnection::Get() {
 }
 
 // static
+bool WindowManagerConnection::Exists() {
+  return !!lazy_tls_ptr.Pointer()->Get();
+}
+
+// static
 void WindowManagerConnection::Reset() {
   delete Get();
   lazy_tls_ptr.Pointer()->Set(nullptr);