Issue #80 - De-unify dom/media part 1

This de-unifies up to and including dom/media/platforms with the exception of
dom/media/platforms/wmf, because that one throws weird errors in the Win
SDK which don't have a clear cause (yet)

dom/media/MediaStreamTrack.cpp

@@ -7,8 +7,10 @@
 
 #include "DOMMediaStream.h"
 #include "MediaStreamGraph.h"
+#include "nsContentUtils.h"
 #include "nsIUUIDGenerator.h"
 #include "nsServiceManagerUtils.h"
+#include "MediaStreamError.h"
 #include "MediaStreamListener.h"
 #include "systemservices/MediaUtils.h"
 
@@ -21,6 +23,8 @@
 static mozilla::LazyLogModule gMediaStreamTrackLog("MediaStreamTrack");
 #define LOG(type, msg) MOZ_LOG(gMediaStreamTrackLog, type, msg)
 
+using namespace mozilla::media;
+
 namespace mozilla {
 namespace dom {