Set up new desktop classes.

ui/views/widget/desktop_root_window_host_linux.h

Index: ui/views/widget/desktop_root_window_host_linux.h
===================================================================
--- ui/views/widget/desktop_root_window_host_linux.h	(revision 0)
+++ ui/views/widget/desktop_root_window_host_linux.h	(revision 0)
@@ -0,0 +1,26 @@
+// 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 UI_VIEWS_WIDGET_DESKTOP_ROOT_WINDOW_HOST_LINUX_H_
+#define UI_VIEWS_WIDGET_DESKTOP_ROOT_WINDOW_HOST_LINUX_H_
+
+#include "base/basictypes.h"
+#include "ui/views/widget/desktop_root_window_host.h"
+
+namespace views {
+
+class DesktopRootWindowHostLinux : public DesktopRootWindowHost {
+ public:
+  DesktopRootWindowHostLinux();
+  virtual ~DesktopRootWindowHostLinux();
+
+ private:
+  // Overridden from DesktopRootWindowHost:
+
+  DISALLOW_COPY_AND_ASSIGN(DesktopRootWindowHostLinux);
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_WIDGET_DESKTOP_ROOT_WINDOW_HOST_LINUX_H_