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

media/base/demuxer.h

Index: media/base/demuxer.h
diff --git a/media/base/demuxer.h b/media/base/demuxer.h
index 71cdc6d14a91518950aa7d1dc943568937dff761..350d87f0233fe899bc8ab446a0eda88594795a94 100644
--- a/media/base/demuxer.h
+++ b/media/base/demuxer.h
@@ -60,6 +60,13 @@ class MEDIA_EXPORT DemuxerHost {
 
 class MEDIA_EXPORT Demuxer : public MediaResource {
  public:
+  enum LoadType {
+    LoadTypeURL = 0,
+    LoadTypeMediaSource = 1,
+    LoadTypeMediaStream = 2,
+    LoadTypeMax = LoadTypeMediaStream,
+  };
+
   // A new potentially encrypted stream has been parsed.
   // First parameter - The type of initialization data.
   // Second parameter - The initialization data associated with the stream.