Implemented HEVC video demuxing and parsing

media/BUILD.gn

Index: media/BUILD.gn
diff --git a/media/BUILD.gn b/media/BUILD.gn
index 264bdd0c3855498a845c8dcd38e6841066d65421..7ed09b942f059e7e119d0b0232ce6af3defedd71 100644
--- a/media/BUILD.gn
+++ b/media/BUILD.gn
@@ -306,10 +306,21 @@ component("media") {
         "filters/ffmpeg_aac_bitstream_converter.h",
         "filters/ffmpeg_h264_to_annex_b_bitstream_converter.cc",
         "filters/ffmpeg_h264_to_annex_b_bitstream_converter.h",
+        "filters/ffmpeg_h265_to_annex_b_bitstream_converter.cc",
+        "filters/ffmpeg_h265_to_annex_b_bitstream_converter.h",
       ]
     }
   }
 
+  if (proprietary_codecs) {
+    sources += [
+      "filters/h265_parser.cc",
+      "filters/h265_parser.h",
+      "formats/mp4/hevc.cc",
+      "formats/mp4/hevc.h",
+    ]
+  }
+
   if (current_cpu == "arm" && arm_use_neon) {
     defines += [ "USE_NEON" ]
   }
@@ -649,6 +660,7 @@ test("media_unittests") {
       "filters/ffmpeg_aac_bitstream_converter_unittest.cc",
       "filters/ffmpeg_h264_to_annex_b_bitstream_converter_unittest.cc",
       "filters/h264_to_annex_b_bitstream_converter_unittest.cc",
+      "filters/h265_parser_unittest.cc",
       "formats/common/stream_parser_test_base.cc",
       "formats/common/stream_parser_test_base.h",
       "formats/mp2t/es_adapter_video_unittest.cc",