Sort includes to follow WebKit style.

lib/dom/scripts/systemnative.py

 #!/usr/bin/python
 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """This module provides shared functionality for the systems to generate
 native binding from the IDL database."""
 
 import emitter
 import os
@@ skipping 1042 matching lines @@
 
     if 'ImplementedBy' in attributes:
       arguments.insert(0, 'receiver')
       self._cpp_impl_includes.add('"%s.h"' % attributes['ImplementedBy'])
 
     return emitter.Format(invocation_template,
         FUNCTION_CALL='%s(%s)' % (function_expression, ', '.join(arguments)))
 
 
 def _GenerateCPPIncludes(includes):
-  return ''.join(['#include %s\n' % include for include in includes])
+  return ''.join(['#include %s\n' % include for include in sorted(includes)])
 
 def _DOMWrapperType(database, interface):
   if interface.id == 'MessagePort':
     return 'MessagePort'
 
   type = 'Object'
   def is_node(interface):
     return interface.id == 'Node'
   if is_node(interface) or _FindParent(interface, database, is_node):
     type = 'Node'
@@ skipping 15 matching lines @@
 
 def _IsArgumentOptionalInWebCore(argument):
   return IsOptional(argument) and not 'Callback' in argument.ext_attrs
 
 def _ToWebKitName(name):
   name = name[0].lower() + name[1:]
   name = re.sub(r'^(hTML|uRL|jS|xML|xSLT)', lambda s: s.group(1).lower(),
                 name)
   return re.sub(r'^(create|exclusive)', lambda s: 'is' + s.group(1).capitalize(),
                 name)