wm: Update namespace and header define guards.

src/platform/window_manager/window.h

Index: src/platform/window_manager/window.h
diff --git a/src/platform/window_manager/window.h b/src/platform/window_manager/window.h
index d63e900d669d19b0582eb0c17b4574b96ab55467..496557a3ae5eca3a52a4b4ced2bc5c0c361b557e 100644
--- a/src/platform/window_manager/window.h
+++ b/src/platform/window_manager/window.h
@@ -2,8 +2,8 @@
 // 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_H__
-#define __PLATFORM_WINDOW_MANAGER_WINDOW_H__
+#ifndef WINDOW_MANAGER_WINDOW_H_
+#define WINDOW_MANAGER_WINDOW_H_
 
 extern "C" {
 #include <X11/Xlib.h>
@@ -23,7 +23,7 @@ extern "C" {
 
 typedef ::Window XWindow;
 
-namespace chromeos {
+namespace window_manager {
 
 class Shadow;
 template<class T> class Stacker;  // from util.h
@@ -349,6 +349,6 @@ class Window {
   DISALLOW_COPY_AND_ASSIGN(Window);
 };
 
-}  // namespace chromeos
+}  // namespace window_manager
 
 #endif