import changes from `dev' branch of rmottola/Arctic-Fox:

- Bug 1146086: use promise to Init() in PlatformDecoderModule. r=jya,r=cpearce (aed679865)
- partial of Bug 1128380: Add IsHardwareAccelerated implementation for AVCC and mac decoder. r=cpearce (8b376df05)
- Bug 1192675: P1. Ensure VDA/VT APIs are only ever accessed from the same thread. r=cpearce (fa9c8de6a)
- Bug 1178098 - Report why DXVA initialization failed to about:support. r=cpearce (0b06a28e9)
- Bug 1167690 - Part 1: Hook up NPPVpluginIsPlayingAudio to the plugin process; r=josh (30df04ca2)
- Bug 1167690 - Add NPAPI:AudioControl enums to npapi.h. r=josh (5369f6fa9)
- Bug 1167690 - Part 2: Integrate plugins which support the NPAPI audio extensions with the Audio Channel Service; r=BenWa (145cecdc4)
- Bug 1167690 - Part 3: Hook up NPNVmuteAudioBool to the plugin process; r=josh (36558b729)
- Bug 1167690 - Part 4: Add support for testing plugin audio channel integration to the test plugin; r=josh (04af51882)

dom/media/platforms/agnostic/BlankDecoderModule.cpp

@@ -25,15 +25,17 @@ public:
 
   BlankMediaDataDecoder(BlankMediaDataCreator* aCreator,
                         FlushableTaskQueue* aTaskQueue,
-                        MediaDataDecoderCallback* aCallback)
+                        MediaDataDecoderCallback* aCallback,
+                        TrackInfo::TrackType aType)
     : mCreator(aCreator)
     , mTaskQueue(aTaskQueue)
     , mCallback(aCallback)
+    , mType(aType)
   {
   }
 
-  virtual nsresult Init() override {
-    return NS_OK;
+  virtual nsRefPtr<InitPromise> Init() override {
+    return InitPromise::CreateAndResolve(mType, __func__);
   }
 
   virtual nsresult Shutdown() override {
@@ -89,6 +91,7 @@ private:
   nsAutoPtr<BlankMediaDataCreator> mCreator;
   RefPtr<FlushableTaskQueue> mTaskQueue;
   MediaDataDecoderCallback* mCallback;
+  TrackInfo::TrackType mType;
 };
 
 class BlankVideoDataCreator {
@@ -221,7 +224,8 @@ public:
     nsRefPtr<MediaDataDecoder> decoder =
       new BlankMediaDataDecoder<BlankVideoDataCreator>(creator,
                                                        aVideoTaskQueue,
-                                                       aCallback);
+                                                       aCallback,
+                                                       TrackInfo::kVideoTrack);
     return decoder.forget();
   }
 
@@ -236,7 +240,8 @@ public:
     nsRefPtr<MediaDataDecoder> decoder =
       new BlankMediaDataDecoder<BlankAudioDataCreator>(creator,
                                                        aAudioTaskQueue,
-                                                       aCallback);
+                                                       aCallback,
+                                                       TrackInfo::kAudioTrack);
     return decoder.forget();
   }