Get AcceleratorControllerTest working with mash

ash/mus/bridge/wm_shell_mus_test_api.h

+// 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.
+
+#ifndef ASH_MUS_BRIDGE_WM_SHELL_MUS_TEST_API_H_
+#define ASH_MUS_BRIDGE_WM_SHELL_MUS_TEST_API_H_
+
+#include "ash/mus/bridge/wm_shell_mus.h"
+
+namespace ash {
+namespace mus {
+
+// Use to get at internal state of WmShellMus.
+class WmShellMusTestApi {
+ public:
+  WmShellMusTestApi() {}
+  ~WmShellMusTestApi() {}
+
+  AcceleratorControllerRegistrar* accelerator_controller_registrar() {
+    return WmShellMus::Get()->accelerator_controller_registrar_.get();
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(WmShellMusTestApi);
+};
+
+}  // namespace mus
+}  // namespace ash
+
+#endif  // ASH_MUS_BRIDGE_WM_SHELL_MUS_TEST_API_H_