Add type argument to pepper content decryptor method GenerateKeyRequest().

ppapi/api/private/ppb_content_decryptor_private.idl

 /* 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>PPB_ContentDecryptor_Private</code>
  * interface. Note: This is a special interface, only to be used for Content
  * Decryption Modules, not normal plugins.
  */
 label Chrome {
-  M24 = 0.5
+  M24 = 0.6
 };
 
 /**
  * <code>PPB_ContentDecryptor_Private</code> structure contains the function
  * pointers the browser must implement to support plugins implementing the
  * <code>PPP_ContentDecryptor_Private</code> interface. This interface provides
  * browser side support for the Content Decryption Module (CDM) for v0.1 of the
  * proposed Encrypted Media Extensions: http://goo.gl/rbdnR
  */
 interface PPB_ContentDecryptor_Private {
@@ skipping 219 matching lines @@
    *
    * @param[in] decrypted_block_info A <code>PP_DecryptedBlockInfo</code> that
    * contains the tracking info and result code associated with the
    * <code>decrypted_block</code>.
    */
   void DeliverSamples(
       [in] PP_Instance instance,
       [in] PP_Resource audio_frames,
       [in] PP_DecryptedBlockInfo decrypted_block_info);
 };