Remove the checksum/HMAC code from the decryptor.

media/mp4/mp4_stream_parser.cc

 // 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.
 
 #include "media/mp4/mp4_stream_parser.h"
 
 #include "base/callback.h"
 #include "base/callback_helpers.h"
 #include "base/logging.h"
 #include "base/time.h"
@@ skipping 396 matching lines @@
       DLOG(ERROR) << "Failed to prepare AAC sample for decode";
       *err = true;
       return false;
     }
   }
 
   if (decrypt_config.get() != NULL && !subsamples.empty()) {
     decrypt_config.reset(new DecryptConfig(
         decrypt_config->key_id(),
         decrypt_config->iv(),
-        decrypt_config->checksum(),
         decrypt_config->data_offset(),
         subsamples));
   }
 
   scoped_refptr<StreamParserBuffer> stream_buf =
     StreamParserBuffer::CopyFrom(&frame_buf[0], frame_buf.size(),
                                  runs_->is_keyframe());
 
   if (runs_->is_encrypted())
     stream_buf->SetDecryptConfig(decrypt_config.Pass());
@@ skipping 55 matching lines @@
   return !err;
 }
 
 void MP4StreamParser::ChangeState(State new_state) {
   DVLOG(2) << "Changing state: " << new_state;
   state_ = new_state;
 }
 
 }  // namespace mp4
 }  // namespace media