Add ShellDelegate, MediaDelegate and KeyboardUI stubs to mus ash

ash/mus/root_window_controller.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 "ash/mus/root_window_controller.h"
 
 #include <stdint.h>
 
+#include <algorithm>
 #include <map>
 #include <sstream>
 
 #include "ash/common/root_window_controller_common.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/wm/always_on_top_controller.h"
 #include "ash/common/wm/container_finder.h"
 #include "ash/common/wm/dock/docked_window_layout_manager.h"
 #include "ash/common/wm/panels/panel_layout_manager.h"
 #include "ash/common/wm/root_window_layout_manager.h"
@@ skipping 235 matching lines @@
       base::WrapUnique(new DockedWindowLayoutManager(docked_container)));
 
   WmWindowMus* panel_container =
       GetWindowByShellWindowId(kShellWindowId_PanelContainer);
   panel_container->SetLayoutManager(
       base::WrapUnique(new PanelLayoutManager(panel_container)));
 }
 
 }  // namespace mus
 }  // namespace ash