bug 1138238 remove unused member variables from WMFVideoMFTManager r=cpearce

--HG--
extra : rebase_source : 019138f4e4ea5b80c795b8cc271410fa7b689ba1

dom/media/fmp4/wmf/WMFVideoMFTManager.h

@@ -61,8 +61,6 @@ private:
   RefPtr<MFTDecoder> mDecoder;
   RefPtr<layers::ImageContainer> mImageContainer;
   nsAutoPtr<DXVA2Manager> mDXVA2Manager;
-  RefPtr<FlushableMediaTaskQueue> mTaskQueue;
-  MediaDataDecoderCallback* mCallback;
 
   const bool mDXVAEnabled;
   const layers::LayersBackend mLayersBackend;