Support HLS MPEG2 TS with SAMPLE-AES encryption.

media/media.gyp

Index: media/media.gyp
diff --git a/media/media.gyp b/media/media.gyp
index a5ea8fb4a86dbaf11a65eda00679a695c0e9326d..a82bcf5203f9685255b2f28fcbd3a4fdf979085a 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -37,8 +37,10 @@
         # Enable HEVC/H265 demuxing. Actual decoding must be provided by the
         # platform.
         'enable_hevc_demuxing%': 1,
+        'enable_hls_sample_aes%': 1,
       }, {
         'enable_hevc_demuxing%': 0,
+        'enable_hls_sample_aes%': 0,
       }],
     ],
   },
@@ -1054,6 +1056,8 @@
             'filters/ffmpeg_h264_to_annex_b_bitstream_converter.h',
             'filters/h264_to_annex_b_bitstream_converter.cc',
             'filters/h264_to_annex_b_bitstream_converter.h',
+            'formats/mp2t/descriptors.cc',
+            'formats/mp2t/descriptors.h',
             'formats/mp2t/es_adapter_video.cc',
             'formats/mp2t/es_adapter_video.h',
             'formats/mp2t/es_parser.cc',
@@ -1127,6 +1131,19 @@
             'filters/ffmpeg_h265_to_annex_b_bitstream_converter.h',
           ],
         }],
+        ['proprietary_codecs==1 and enable_hls_sample_aes==1', {
+          'defines': [
+            'ENABLE_HLS_SAMPLE_AES'
+          ],
+          'sources': [
+            'formats/mp2t/ts_section_cat.cc',
+            'formats/mp2t/ts_section_cat.h',
+            'formats/mp2t/ts_section_cets_ecm.cc',
+            'formats/mp2t/ts_section_cets_ecm.h',
+            'formats/mp2t/ts_section_cets_pssh.cc',
+            'formats/mp2t/ts_section_cets_pssh.h',
+          ],
+        }],
         ['target_arch=="ia32" or target_arch=="x64"', {
           'dependencies': [
             'media_asm',
@@ -1189,6 +1206,7 @@
         '../skia/skia.gyp:skia',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
+        '../third_party/boringssl/boringssl.gyp:boringssl',
         '../third_party/libyuv/libyuv.gyp:libyuv',
         '../third_party/widevine/cdm/widevine_cdm.gyp:widevine_cdm_version_h',
         '../ui/gfx/gfx.gyp:gfx',
@@ -1447,6 +1465,11 @@
             'formats/mpeg/mpeg1_audio_stream_parser_unittest.cc',
           ],
         }],
+        ['proprietary_codecs==1 and enable_hls_sample_aes==1', {
+          'defines': [
+            'ENABLE_HLS_SAMPLE_AES'
+          ]
+        }],
         ['OS=="mac"', {
           'sources': [
             'capture/video/mac/video_capture_device_factory_mac_unittest.mm',