Mojify demuxers and allow running {Chunk/FFmpeg}Demuxer in a Utility Process

media/mojo/services/BUILD.gn

Index: media/mojo/services/BUILD.gn
diff --git a/media/mojo/services/BUILD.gn b/media/mojo/services/BUILD.gn
index 68e6adee0f4bb7de76ba3445a3dacc2ff1809252..3db3f7f5e13a5f420be2380cb16118c73e1ac9d9 100644
--- a/media/mojo/services/BUILD.gn
+++ b/media/mojo/services/BUILD.gn
@@ -29,6 +29,8 @@ config("mojo_media_config") {
         defines += [ "ENABLE_MOJO_AUDIO_DECODER" ]
       } else if (service == "video_decoder") {
         defines += [ "ENABLE_MOJO_VIDEO_DECODER" ]
+      } else if (service == "demuxer") {
+        defines += [ "ENABLE_MOJO_DEMUXER" ]
       } else {
         assert(false, "Invalid mojo media service: $service")
       }
@@ -89,8 +91,14 @@ source_set("lib") {
     "mojo_cdm_service.h",
     "mojo_cdm_service_context.cc",
     "mojo_cdm_service_context.h",
+    "mojo_data_source_adapter.cc",
+    "mojo_data_source_adapter.h",
     "mojo_decryptor_service.cc",
     "mojo_decryptor_service.h",
+    "mojo_demuxer_service.cc",
+    "mojo_demuxer_service.h",
+    "mojo_demuxer_service_context.cc",
+    "mojo_demuxer_service_context.h",
     "mojo_demuxer_stream_adapter.cc",
     "mojo_demuxer_stream_adapter.h",
     "mojo_media_client.cc",
@@ -99,6 +107,8 @@ source_set("lib") {
     "mojo_provision_fetcher.h",
     "mojo_renderer_service.cc",
     "mojo_renderer_service.h",
+    "mojo_source_buffer_service.cc",
+    "mojo_source_buffer_service.h",
     "mojo_video_decoder_service.cc",
     "mojo_video_decoder_service.h",
     "mojo_video_renderer_sink_adapter.cc",