Add unit tests for OpusAudioDecoder.

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 cras (ChromeOS audio) library.
     'use_cras%': 0,
     # Option e.g. for Linux distributions to link pulseaudio directly
@@ skipping 983 matching lines @@
         'filters/fake_video_decoder.cc',
         'filters/fake_video_decoder.h',
         'filters/fake_video_decoder_unittest.cc',
         'filters/ffmpeg_audio_decoder_unittest.cc',
         'filters/ffmpeg_demuxer_unittest.cc',
         'filters/ffmpeg_glue_unittest.cc',
         'filters/ffmpeg_h264_to_annex_b_bitstream_converter_unittest.cc',
         'filters/ffmpeg_video_decoder_unittest.cc',
         'filters/file_data_source_unittest.cc',
         'filters/h264_to_annex_b_bitstream_converter_unittest.cc',
+        'filters/opus_audio_decoder_unittest.cc',
         'filters/pipeline_integration_test.cc',
         'filters/pipeline_integration_test_base.cc',
         'filters/skcanvas_video_renderer_unittest.cc',
         'filters/source_buffer_stream_unittest.cc',
         'filters/video_decoder_selector_unittest.cc',
         'filters/video_frame_stream_unittest.cc',
         'filters/video_renderer_impl_unittest.cc',
         'midi/midi_message_queue_unittest.cc',
         'midi/midi_message_util_unittest.cc',
         'video/capture/video_capture_device_unittest.cc',
@@ skipping 629 matching lines @@
                   ],
                 }],
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }