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 7ac3890acbf0b90a0305b9b2094f06a7dc641313..818cfec39a9162fc0026790f072009d7df4eaf0d 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -129,6 +129,8 @@
         'base/audio_decoder_config.cc',
         'base/audio_decoder_config.h',
         'base/audio_renderer.h',
+        'base/bit_reader.cc',
+        'base/bit_reader.h',
         'base/bitstream_buffer.h',
         'base/buffers.cc',
         'base/buffers.h',
@@ -448,6 +450,8 @@
         }],
         ['proprietary_codecs==1 or branding=="Chrome"', {
           'sources': [
+            'mp4/aac.cc',
+            'mp4/aac.h',
             'mp4/avc.cc',
             'mp4/avc.h',
             'mp4/box_definitions.cc',
@@ -659,6 +663,7 @@
         'audio/win/audio_low_latency_input_win_unittest.cc',
         'audio/win/audio_low_latency_output_win_unittest.cc',
         'audio/win/audio_output_win_unittest.cc',
+        'base/bit_reader_unittest.cc',
         'base/buffers_unittest.cc',
         'base/clock_unittest.cc',
         'base/composite_filter_unittest.cc',
@@ -754,6 +759,7 @@
         }],
         ['proprietary_codecs==1 or branding=="Chrome"', {
           'sources': [
+            'mp4/aac_unittest.cc',
             'mp4/avc_unittest.cc',
             'mp4/box_reader_unittest.cc',
             'mp4/mp4_stream_parser_unittest.cc',