wm: Update namespace and header define guards.

src/platform/window_manager/real_x_connection.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_REAL_X_CONNECTION_H__
-#define __PLATFORM_WINDOW_MANAGER_REAL_X_CONNECTION_H__
+#ifndef WINDOW_MANAGER_REAL_X_CONNECTION_H_
+#define WINDOW_MANAGER_REAL_X_CONNECTION_H_
 
 #include "window_manager/x_connection.h"
 
-namespace chromeos {
+namespace window_manager {
 
 // This wraps an actual connection to an X server.
 class RealXConnection : public XConnection {
  public:
   explicit RealXConnection(Display* display);
 
   bool GetWindowGeometry(
       XWindow xid, int* x, int* y, int* width, int* height);
   bool MapWindow(XWindow xid);
   bool UnmapWindow(XWindow xid);
@@ skipping 77 matching lines @@
   // The root window.
   XWindow root_;
 
   // ID for the UTF8_STRING atom (we look this up ourselves so as to avoid
   // a circular dependency with AtomCache).
   XAtom utf8_string_atom_;
 
   DISALLOW_COPY_AND_ASSIGN(RealXConnection);
 };
 
-}  // namespace chromeos
+}  // namespace window_manager
 
 #endif