Routes calls to WM through WS

components/mus/public/interfaces/window_tree_host.mojom

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module mus.mojom;
 
+import "components/mus/public/interfaces/window_manager.mojom";
 import "components/mus/public/interfaces/window_tree.mojom";
 import "ui/mojo/events/input_event_constants.mojom";
 import "ui/mojo/events/input_event_matcher.mojom";
 import "ui/mojo/events/input_events.mojom";
 import "ui/mojo/events/input_key_codes.mojom";
 import "ui/mojo/geometry/geometry.mojom";
 
 // WindowTreeHost encapsulates a unique underlying platform window, with a tree
 // of windows.
 interface WindowTreeHost {
@@ skipping 18 matching lines @@
 };
 
 interface WindowTreeHostClient {
   // An accelerator registered via AddAccelerator() has been triggered.
   OnAccelerator(uint32 id, mojo.Event event);
 };
 
 interface WindowTreeHostFactory {
   CreateWindowTreeHost(WindowTreeHost& window_tree_host,
                        WindowTreeHostClient? host_client,
-                       WindowTreeClient tree_client);
+                       WindowTreeClient tree_client,
+                       WindowManager? window_manager);
 };