chromeos: fix focus for mushrome

ui/aura/test/mus/window_tree_client_private.cc

 // Copyright 2016 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.
 
 #include "ui/aura/test/mus/window_tree_client_private.h"
 
 #include "ui/aura/mus/window_port_mus.h"
 #include "ui/aura/mus/window_tree_client.h"
 #include "ui/aura/mus/window_tree_host_mus_init_params.h"
 #include "ui/aura/window.h"
@@ skipping 81 matching lines @@
   return tree_client_impl_->CreateInitParamsForNewDisplay();
 }
 
 void WindowTreeClientPrivate::SetTreeAndClientId(
     ui::mojom::WindowTree* window_tree,
     ClientSpecificId client_id) {
   tree_client_impl_->WindowTreeConnectionEstablished(window_tree);
   tree_client_impl_->client_id_ = client_id;
 }
 
+void WindowTreeClientPrivate::SetWindowManagerClient(
+    ui::mojom::WindowManagerClient* client) {
+  tree_client_impl_->window_manager_client_ = client;
+}
+
 bool WindowTreeClientPrivate::HasPointerWatcher() {
   return tree_client_impl_->has_pointer_watcher_;
 }
 
 Window* WindowTreeClientPrivate::GetWindowByServerId(Id id) {
   WindowMus* window = tree_client_impl_->GetWindowByServerId(id);
   return window ? window->GetWindow() : nullptr;
 }
 
 }  // namespace aura