Enable AudioDecoder unit tests on Android

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index ca93b36091dcb352d03d691a55c806ba4748b210..29f86273aa9f9030a0aa3aa21348e0e9f19aa7c2 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -1304,7 +1304,10 @@
         'ffmpeg/ffmpeg_common_unittest.cc',
         'filters/audio_clock_unittest.cc',
         'filters/audio_decoder_selector_unittest.cc',
+        'filters/audio_decoder_test.h',
         'filters/audio_decoder_unittest.cc',
+        'filters/audio_decoder_unittest_chromium.cc',
+        'filters/audio_decoder_unittest_ffmpeg.cc',
         'filters/audio_file_reader_unittest.cc',
         'filters/audio_renderer_algorithm_unittest.cc',
         'filters/blocking_url_protocol_unittest.cc',
@@ -1378,7 +1381,7 @@
         }, {  # media_use_ffmpeg==0
           'sources!': [
             'ffmpeg/ffmpeg_common_unittest.cc',
-            'filters/audio_decoder_unittest.cc',
+            'filters/audio_decoder_unittest_ffmpeg.cc',
             'filters/ffmpeg_aac_bitstream_converter_unittest.cc',
             'filters/ffmpeg_demuxer_unittest.cc',
             'filters/ffmpeg_glue_unittest.cc',
@@ -1399,7 +1402,7 @@
             # These tests are confused by Android always having proprietary
             # codecs enabled, but ffmpeg_branding=Chromium. These should be
             # fixed, see http://crbug.com/570762.
-            'filters/audio_decoder_unittest.cc',
+            'filters/audio_decoder_unittest_ffmpeg.cc',
             'filters/audio_file_reader_unittest.cc',
             'filters/ffmpeg_demuxer_unittest.cc',
           ],