Support MPEG1 audio in the MPEG2-TS stream parser.

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index 197c153d7fd084d7fb4c399259b6f23ffffea600..6781efb5ed34f7348f4be20e502971ffcea12e65 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -931,6 +931,8 @@
             'formats/mp2t/es_parser_adts.h',
             'formats/mp2t/es_parser_h264.cc',
             'formats/mp2t/es_parser_h264.h',
+            'formats/mp2t/es_parser_mpeg1audio.cc',
+            'formats/mp2t/es_parser_mpeg1audio.h',
             'formats/mp2t/mp2t_common.h',
             'formats/mp2t/mp2t_stream_parser.cc',
             'formats/mp2t/mp2t_stream_parser.h',
@@ -967,10 +969,10 @@
             'formats/mpeg/adts_constants.h',
             'formats/mpeg/adts_stream_parser.cc',
             'formats/mpeg/adts_stream_parser.h',
-            'formats/mpeg/mp3_stream_parser.cc',
-            'formats/mpeg/mp3_stream_parser.h',
             'formats/mpeg/mpeg_audio_stream_parser_base.cc',
             'formats/mpeg/mpeg_audio_stream_parser_base.h',
+            'formats/mpeg/mpeg1_audio_stream_parser.cc',
+            'formats/mpeg/mpeg1_audio_stream_parser.h',
           ],
         }],
         ['target_arch=="ia32" or target_arch=="x64"', {
@@ -1304,6 +1306,7 @@
             'formats/mp2t/es_adapter_video_unittest.cc',
             'formats/mp2t/es_parser_adts_unittest.cc',
             'formats/mp2t/es_parser_h264_unittest.cc',
+            'formats/mp2t/es_parser_mpeg1audio_unittest.cc',
             'formats/mp2t/es_parser_test_base.cc',
             'formats/mp2t/es_parser_test_base.h',
             'formats/mp2t/mp2t_stream_parser_unittest.cc',
@@ -1315,7 +1318,7 @@
             'formats/mp4/sample_to_group_iterator_unittest.cc',
             'formats/mp4/track_run_iterator_unittest.cc',
             'formats/mpeg/adts_stream_parser_unittest.cc',
-            'formats/mpeg/mp3_stream_parser_unittest.cc',
+            'formats/mpeg/mpeg1_audio_stream_parser_unittest.cc',
           ],
         }],
         # TODO(wolenetz): Fix size_t to int truncations in win64. See