Bug 1377370. P2 - simplify HLSDecoder::Clone() for HLSResource doesn't support clone at all. r=kikuo

MozReview-Commit-ID: FxebHdK4EmM

--HG--
extra : rebase_source : d1074b8e5edf646244922a734839c19f8a4fb1b4
extra : source : 418066ce151ef0e5dc4b817f8663c281fc5fcc0d

dom/media/hls/HLSDecoder.cpp

@@ -39,10 +39,8 @@ HLSDecoder::CreateStateMachine()
 ChannelMediaDecoder*
 HLSDecoder::Clone(MediaDecoderInit& aInit)
 {
-  if (!IsEnabled()) {
-    return nullptr;
-  }
-  return new HLSDecoder(aInit);
+  MOZ_CRASH("Clone is not supported");
+  return nullptr;
 }
 
 bool