Call CDMWrapper from PpapiDecryptor.

ppapi/api/dev/ppp_content_decryptor_dev.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>PPP_ContentDecryptor_Dev</code>
  * interface.
  */
 label Chrome {
@@ skipping 31 matching lines @@
   PP_Bool CancelKeyRequest(
       [in] PP_Instance instance,
       [in] PP_Var session_id);  /* String. */
 
   /**
    * Decrypts the block and returns the unencrypted block. In the case of
    * media, the block contains encoded data.
    */
   PP_Bool Decrypt(
       [in] PP_Instance instance,
-      [in] PP_Resource encrypted_block,  /* PPB_Buffer. */
-      [in] PP_CompletionCallback callback);
+      [in] PP_DecryptionBuffer_Dev encrypted_buffer);
 
   /**
    * Decrypts the block then decodes it and returns the unencrypted raw
    * (decoded) frame.
    */
   PP_Bool DecryptAndDecode(
       [in] PP_Instance instance,
       [in] PP_Resource encrypted_block,  /* PPB_Buffer. */
       [in] PP_CompletionCallback callback);
 };