Google codestyle prescribes sorting #include filenames within a section....

chrome/browser/chromeos/wm_ipc.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/browser/chromeos/wm_ipc.h"
 
 #include <gdk/gdkx.h>
 extern "C" {
 #include <X11/Xlib.h>
 }
 
 #include "app/x11_util.h"
 #include "base/logging.h"
+#include "base/scoped_ptr.h"
 #include "base/singleton.h"
-#include "base/scoped_ptr.h"
 
 namespace chromeos {
 
 namespace {
 
 // A value from the Atom enum and the actual name that should be used to
 // look up its ID on the X server.
 struct AtomInfo {
   WmIpc::AtomType atom;
   const char* name;
@@ skipping 175 matching lines @@
   // Let the window manager know which version of the IPC messages we support.
   Message msg(chromeos::WM_IPC_MESSAGE_WM_NOTIFY_IPC_VERSION);
   // TODO: The version number is the latest listed in wm_ipc.h --
   // ideally, once this header is shared between Chrome and the Chrome OS window
   // manager, we'll just define the version statically in the header.
   msg.set_param(0, 1);
   SendMessage(msg);
 }
 
 }  // namespace chromeos