Revert of Start of display management for mus

ui/views/mus/window_manager_connection.h

Index: ui/views/mus/window_manager_connection.h
diff --git a/ui/views/mus/window_manager_connection.h b/ui/views/mus/window_manager_connection.h
index af250037613a122d7b31c2e85b11298e6d65489c..ab12a03b05b1d16d1318688ebdf390a864154a79 100644
--- a/ui/views/mus/window_manager_connection.h
+++ b/ui/views/mus/window_manager_connection.h
@@ -18,9 +18,14 @@
 class ApplicationImpl;
 }
 
+namespace ui {
+namespace mojo {
+class UIInit;
+}
+}
+
 namespace views {
 class NativeWidget;
-class ScreenMus;
 namespace internal {
 class NativeWidgetDelegate;
 }
@@ -55,7 +60,7 @@
 
   mojo::ApplicationImpl* app_;
   mus::mojom::WindowManagerPtr window_manager_;
-  scoped_ptr<ScreenMus> screen_;
+  scoped_ptr<ui::mojo::UIInit> ui_init_;
   scoped_ptr<mus::WindowTreeConnection> window_tree_connection_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowManagerConnection);