Remove the checksum/HMAC code from the decryptor.

webkit/media/crypto/ppapi/content_decryption_module.h

 // 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.
 
 #ifndef WEBKIT_MEDIA_CRYPTO_PPAPI_CONTENT_DECRYPTION_MODULE_H_
 #define WEBKIT_MEDIA_CRYPTO_PPAPI_CONTENT_DECRYPTION_MODULE_H_
 
 #if defined(_MSC_VER)
 typedef unsigned char uint8_t;
 typedef unsigned int uint32_t;
@@ skipping 79 matching lines @@
 // own any pointers in this struct.
 struct InputBuffer {
   InputBuffer()
       : data(NULL),
         data_size(0),
         data_offset(0),
         key_id(NULL),
         key_id_size(0),
         iv(NULL),
         iv_size(0),
-        checksum(NULL),
-        checksum_size(0),
         subsamples(NULL),
         num_subsamples(0),
         timestamp(0) {}
 
   const uint8_t* data;  // Pointer to the beginning of the input data.
   uint32_t data_size;  // Size (in bytes) of |data|.
 
   uint32_t data_offset;  // Number of bytes to be discarded before decryption.
 
   const uint8_t* key_id;  // Key ID to identify the decryption key.
   uint32_t key_id_size;  // Size (in bytes) of |key_id|.
 
   const uint8_t* iv;  // Initialization vector.
   uint32_t iv_size;  // Size (in bytes) of |iv|.
 
-  const uint8_t* checksum;
-  uint32_t checksum_size;  // Size (in bytes) of the |checksum|.
-
   const struct SubsampleEntry* subsamples;
   uint32_t num_subsamples;  // Number of subsamples in |subsamples|.
 
   int64_t timestamp;  // Presentation timestamp in microseconds.
 };
 
 // Represents an output decrypted buffer. It does not own |data|.
 struct OutputBuffer {
   OutputBuffer()
       : data(NULL),
@@ skipping 174 matching lines @@
   // re-initialize the video decoder. This can be used to reconfigure the
   // video decoder if the config changes.
   virtual void StopVideoDecoder() = 0;
 
   virtual ~ContentDecryptionModule() {}
 };
 
 }  // namespace cdm
 
 #endif  // WEBKIT_MEDIA_CRYPTO_PPAPI_CONTENT_DECRYPTION_MODULE_H_