wm: Update namespace and header define guards.

src/platform/window_manager/window_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_WINDOW_MANAGER_H__
-#define __PLATFORM_WINDOW_MANAGER_WINDOW_MANAGER_H__
+#ifndef WINDOW_MANAGER_WINDOW_MANAGER_H_
+#define WINDOW_MANAGER_WINDOW_MANAGER_H_
 
 #include <map>
 #include <set>
 #include <vector>
 #include <tr1/memory>
 
 extern "C" {
 #include <X11/Xlib.h>
 #include <X11/extensions/shape.h>
 #include <X11/extensions/Xrandr.h>
 }
 
 #include <gtest/gtest_prod.h>  // for FRIEND_TEST() macro
 
 #include "base/scoped_ptr.h"
 #include "window_manager/atom_cache.h"  // for Atom enum
 #include "window_manager/clutter_interface.h"
 
 typedef ::Atom XAtom;
 typedef ::Window XWindow;
 
-namespace chromeos {
+namespace window_manager {
 
 class EventConsumer;
 class HotkeyOverlay;
 class KeyBindings;
 class LayoutManager;
 class MetricsReporter;
 class PanelBar;
 class StackingManager;
 class Window;
 class WmIpc;
@@ skipping 252 matching lines @@
 
   // Is the hotkey overlay currently being shown?
   bool showing_hotkey_overlay_;
 
   // Shows overlayed images containing hotkeys.
   scoped_ptr<HotkeyOverlay> hotkey_overlay_;
 
   DISALLOW_COPY_AND_ASSIGN(WindowManager);
 };
 
-}  // namespace chromeos
+}  // namespace window_manager
 
 #endif