--- a/dom/media/Benchmark.h
+++ b/dom/media/Benchmark.h
@@ -38,18 +38,17 @@ public:
   bool OnReaderTaskQueue() override;
 
 private:
   Atomic<Benchmark*> mMainThreadState;
 
   RefPtr<FlushableTaskQueue> mDecoderTaskQueue;
   RefPtr<MediaDataDecoder> mDecoder;
 
-  RefPtr<TaskQueue> mTaskQueue;
-  // Object only accessed on mTaskQueue
+  // Object only accessed on Thread()
   RefPtr<MediaDataDemuxer> mDemuxer;
   RefPtr<MediaTrackDemuxer> mTrackDemuxer;
   nsTArray<RefPtr<MediaRawData>> mSamples;
   size_t mSampleIndex;
   TimeStamp mDecodeStartTime;
   uint32_t mFrameCount;
   bool mFinished;
 };