Add HE AAC support to ISO BMFF.

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index d8de37a0b0824030cf0762faf8c476da2a01568f..fdfc072ff3840a97fe311a654a1efa3db8684984 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -135,6 +135,8 @@
         'base/audio_renderer_mixer.h',
         'base/audio_renderer_mixer_input.cc',
         'base/audio_renderer_mixer_input.h',
+        'base/bit_reader.cc',
+        'base/bit_reader.h',
         'base/bitstream_buffer.h',
         'base/buffers.cc',
         'base/buffers.h',
@@ -456,6 +458,8 @@
         }],
         ['proprietary_codecs==1 or branding=="Chrome"', {
           'sources': [
+            'mp4/aac.cc',
+            'mp4/aac.h',
             'mp4/avc.cc',
             'mp4/avc.h',
             'mp4/box_definitions.cc',
@@ -464,6 +468,8 @@
             'mp4/box_reader.h',
             'mp4/cenc.cc',
             'mp4/cenc.h',
+            'mp4/es_descriptor.cc',
+            'mp4/es_descriptor.h',
             'mp4/mp4_stream_parser.cc',
             'mp4/mp4_stream_parser.h',
             'mp4/offset_byte_queue.cc',
@@ -669,6 +675,7 @@
         'audio/win/audio_output_win_unittest.cc',
         'base/audio_renderer_mixer_unittest.cc',
         'base/audio_renderer_mixer_input_unittest.cc',
+        'base/bit_reader_unittest.cc',
         'base/buffers_unittest.cc',
         'base/clock_unittest.cc',
         'base/composite_filter_unittest.cc',
@@ -771,8 +778,10 @@
         }],
         ['proprietary_codecs==1 or branding=="Chrome"', {
           'sources': [
+            'mp4/aac_unittest.cc',
             'mp4/avc_unittest.cc',
             'mp4/box_reader_unittest.cc',
+            'mp4/es_descriptor_unittest.cc',
             'mp4/mp4_stream_parser_unittest.cc',
             'mp4/offset_byte_queue_unittest.cc',
             'mp4/track_run_iterator_unittest.cc',