ppapi: Support up to 32 subsamples in PP_EncryptedBlockInfo.

ppapi/api/private/ppp_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>PPP_ContentDecryptor_Private</code>
  * interface. Note: This is a special interface, only to be used for Content
  * Decryption Modules, not normal plugins.
  */
 label Chrome {
-  M44 = 0.15
+  M48 = 0.16

[xhwang, 2015/10/19 20:47:26]

There's no direct change in PPP_ContentDecryptor_Private interface, but
PPP_ContentDecryptor_Private interface uses PP_EncryptedBlockInfo which has been
changed. So I think we should still bump the label here. Is this correct?

[bbudge, 2015/10/20 17:38:15]

I'm not that familiar with content decryption, but if plugins that use it aren't
released in sync with Chrome, then you need to keep the old version and support
the older struct. See my comment on PP_EncryptedBlockInfo.

[xhwang, 2015/10/20 18:30:54]

See above.

 };
 
 /**
  * <code>PPP_ContentDecryptor_Private</code> structure contains the function
  * pointers the decryption plugin must implement to provide services needed by
  * the browser. This interface provides the plugin side support for the Content
  * Decryption Module (CDM) for Encrypted Media Extensions:
  * http://www.w3.org/TR/encrypted-media/
  */
 interface PPP_ContentDecryptor_Private {
@@ skipping 272 matching lines @@
    * @param[in] encrypted_block_info A <code>PP_EncryptedBlockInfo</code> that
    * contains all auxiliary information needed for decryption of the
    * <code>encrypted_block</code>.
    */
   void DecryptAndDecode(
       [in] PP_Instance instance,
       [in] PP_DecryptorStreamType decoder_type,
       [in] PP_Resource encrypted_buffer,
       [in] PP_EncryptedBlockInfo encrypted_block_info);
 };