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 8c14c59344044d192440b860ba10996e5536e6aa..d907794cee4d8c4d36436c53232f20ae6da1c2d9 100644
--- a/media/media.gyp
+++ b/media/media.gyp
@@ -46,6 +46,11 @@
         'enable_hevc_demuxing%': 0,
         'enable_mse_mpeg2ts_stream_parser%': 0,
       }],
+      ['proprietary_codecs==1 and is_cast_desktop_build==1', {
+        'enable_hls_sample_aes%': 1,
+      }, {
+        'enable_hls_sample_aes%': 0,
+      }],
     ],
   },
   'includes': [
@@ -66,6 +71,7 @@
           "ENABLE_HEVC_DEMUXING=<(enable_hevc_demuxing)",
           "ENABLE_MSE_MPEG2TS_STREAM_PARSER=<(enable_mse_mpeg2ts_stream_parser)",
           "ENABLE_MP4_VP9_DEMUXING=0",
+          "ENABLE_HLS_SAMPLE_AES=<(enable_hls_sample_aes)",
         ],
       },
     },
@@ -1020,6 +1026,8 @@
         }],
         ['proprietary_codecs==1 and enable_mse_mpeg2ts_stream_parser==1', {
           'sources': [
+            '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',
@@ -1062,6 +1070,16 @@
             'filters/ffmpeg_h265_to_annex_b_bitstream_converter.h',
           ],
         }],
+        ['proprietary_codecs==1 and enable_hls_sample_aes==1', {
+          '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',
@@ -1138,6 +1156,7 @@
         '../skia/skia.gyp:skia',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
+        '../third_party/boringssl/boringssl.gyp:boringssl',
         '../third_party/libwebm/libwebm.gyp:libwebm',
         '../third_party/libyuv/libyuv.gyp:libyuv',
         '../third_party/widevine/cdm/widevine_cdm.gyp:widevine_cdm_version_h',