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

ppapi/api/trusted/ppb_image_data_trusted.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 trusted ImageData interface.
  */
 
 label Chrome {
   M14 = 0.4
 };
 
 /** Trusted interface */
 [macro="PPB_IMAGEDATA_TRUSTED_INTERFACE"]
 interface PPB_ImageDataTrusted {
   /**
    * Returns the internal shared memory pointer associated with the given
    * ImageData resource. Used for proxying. Returns PP_OK on success, or
    * PP_ERROR_* on failure.  On success, the size in bytes of the shared
    * memory region will be placed into |*byte_count|, and the handle for
    * the shared memory in |*handle|.
    */
   int32_t GetSharedMemory(
       [in] PP_Resource image_data,
       [out] handle_t handle,
       [out] uint32_t byte_count);
 };