Update PPAPI IDL generator to define versioned structs, and unversioned typedef.

ppapi/api/pp_resource.idl

-/* Copyright (c) 2011 The Chromium Authors. All rights reserved.
+/* Copyright (c) 2012 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.
  */
 
 /**
  * This file defines the <code>PP_Resource</code> type which represents data
  * associated with the module.
  */
 
 /**
  * This typdef represents an opaque handle assigned by the browser to the
  * resource. The handle is guaranteed never to be 0 for a valid resource, so a
  * module can initialize it to 0 to indicate a "NULL handle." Some interfaces
  * may return a NULL resource to indicate failure.
  *
  * While a Var represents something callable to JS or from the module to
  * the DOM, a resource has no meaning or visibility outside of the module
  * interface.
  *
  * Resources are reference counted. Use <code>AddRefResource()</code>
  * and <code>ReleaseResource()</code> in <code>ppb_core.h</code> to manage the
  * reference count of a resource. The data will be automatically destroyed when
  * the internal reference count reaches 0.
  */
 [assert_size(4)] typedef int32_t PP_Resource;