Add support for encrypted WebM files as defined in the RFC.

media/media.gyp

 # 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.
 
 {
   'variables': {
     'chromium_code': 1,
     # Override to dynamically link the PulseAudio library.
     'use_pulseaudio%': 0,
     # Override to dynamically link the cras (ChromeOS audio) library.
@@ skipping 178 matching lines @@
         'base/video_decoder.h',
         'base/video_decoder_config.cc',
         'base/video_decoder_config.h',
         'base/video_frame.cc',
         'base/video_frame.h',
         'base/video_renderer.h',
         'base/video_util.cc',
         'base/video_util.h',
         'crypto/aes_decryptor.cc',
         'crypto/aes_decryptor.h',
+        'crypto/decryptor.cc',
+        'crypto/decryptor.h',
+        'crypto/hmac_aes_decryptor.cc',
+        'crypto/hmac_aes_decryptor.h',
         'ffmpeg/ffmpeg_common.cc',
         'ffmpeg/ffmpeg_common.h',
         'ffmpeg/file_protocol.cc',
         'ffmpeg/file_protocol.h',
         'filters/audio_file_reader.cc',
         'filters/audio_file_reader.h',
         'filters/audio_renderer_algorithm.cc',
         'filters/audio_renderer_algorithm.h',
         'filters/audio_renderer_impl.cc',
         'filters/audio_renderer_impl.h',
@@ skipping 466 matching lines @@
         'base/ranges_unittest.cc',
         'base/run_all_unittests.cc',
         'base/seekable_buffer_unittest.cc',
         'base/state_matrix_unittest.cc',
         'base/test_data_util.cc',
         'base/test_data_util.h',
         'base/video_frame_unittest.cc',
         'base/video_util_unittest.cc',
         'base/yuv_convert_unittest.cc',
         'crypto/aes_decryptor_unittest.cc',
+        'crypto/hmac_aes_decryptor_unittest.cc',
         'ffmpeg/ffmpeg_common_unittest.cc',
         'filters/audio_renderer_algorithm_unittest.cc',
         'filters/audio_renderer_impl_unittest.cc',
         'filters/bitstream_converter_unittest.cc',
         'filters/chunk_demuxer_unittest.cc',
         'filters/ffmpeg_audio_decoder_unittest.cc',
         'filters/ffmpeg_decoder_unittest.h',
         'filters/ffmpeg_demuxer_unittest.cc',
         'filters/ffmpeg_glue_unittest.cc',
         'filters/ffmpeg_h264_bitstream_converter_unittest.cc',
@@ skipping 389 matching lines @@
             '../third_party/ffmpeg/ffmpeg.gyp:ffmpeg',
           ],
           'sources': [
             'tools/media_bench/media_bench.cc',
           ],
         },
       ],
     }]
   ],
 }