wm: Update namespace and header define guards.

src/platform/window_manager/stacking_manager.h

 // Copyright (c) 2009 The Chromium OS 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 __PLATFORM_WINDOW_MANAGER_STACKING_MANAGER_H__
-#define __PLATFORM_WINDOW_MANAGER_STACKING_MANAGER_H__
+#ifndef WINDOW_MANAGER_STACKING_MANAGER_H_
+#define WINDOW_MANAGER_STACKING_MANAGER_H_
 
 #include <map>
 #include <set>
 #include <tr1/memory>
 
 #include <gtest/gtest_prod.h>  // for FRIEND_TEST() macro
 
 #include "window_manager/clutter_interface.h"
 
 extern "C" {
 #include <X11/Xlib.h>
 }
 
 typedef ::Window XWindow;
 
-namespace chromeos {
+namespace window_manager {
 
 class Window;
 class XConnection;
 
 // Used to stack X11 client windows and Clutter actors.  StackingManager creates
 // a window and an actor to use as reference points for each logical stacking
 // layer and provides methods to move windows and actors between layers.
 class StackingManager {
  public:
   // The layer reference points will be created at the top of the current stack
@@ skipping 77 matching lines @@
   // windows and actors directly beneath the corresponding reference
   // points).
   std::map<Layer, XWindow> layer_to_xid_;
   std::map<Layer, std::tr1::shared_ptr<ClutterInterface::Actor> >
       layer_to_actor_;
 
   // Set we can use for quick lookup of whether an X window belongs to us.
   std::set<XWindow> xids_;
 };
 
-}  // namespace chromeos
+}  // namespace window_manager
 
 #endif