Fix compile with Aura/Mac ash_shell and workspace controller

ash/wm/workspace_controller.h

 // Copyright (c) 2012 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_WM_WORKSPACE_CONTROLLER_H_
 #define ASH_WM_WORKSPACE_CONTROLLER_H_
 #pragma once
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
@@ skipping 69 matching lines @@
   aura::Window* viewport_;
 
   scoped_ptr<WorkspaceManager> workspace_manager_;
 
   // Owned by the window its attached to.
   WorkspaceLayoutManager* layout_manager_;
 
   // Owned the window set on.
   WorkspaceEventFilter* event_filter_;
 
+#if !defined(OS_MACOSX)
   scoped_ptr<views::MenuRunner> menu_runner_;
+#endif
 
   DISALLOW_COPY_AND_ASSIGN(WorkspaceController);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_CONTROLLER_H_