--- a/dom/media/webaudio/AudioContext.cpp
+++ b/dom/media/webaudio/AudioContext.cpp
@@ -23,16 +23,17 @@
 #include "mozilla/dom/ConvolverNodeBinding.h"
 #include "mozilla/dom/DelayNodeBinding.h"
 #include "mozilla/dom/DynamicsCompressorNodeBinding.h"
 #include "mozilla/dom/GainNodeBinding.h"
 #include "mozilla/dom/IIRFilterNodeBinding.h"
 #include "mozilla/dom/HTMLMediaElement.h"
 #include "mozilla/dom/MediaElementAudioSourceNodeBinding.h"
 #include "mozilla/dom/MediaStreamAudioSourceNodeBinding.h"
+#include "mozilla/dom/MediaStreamTrackAudioSourceNodeBinding.h"
 #include "mozilla/dom/OfflineAudioContextBinding.h"
 #include "mozilla/dom/OscillatorNodeBinding.h"
 #include "mozilla/dom/PannerNodeBinding.h"
 #include "mozilla/dom/PeriodicWaveBinding.h"
 #include "mozilla/dom/Promise.h"
 #include "mozilla/dom/StereoPannerNodeBinding.h"
 #include "mozilla/dom/WaveShaperNodeBinding.h"
 
@@ -50,16 +51,17 @@
 #include "ConvolverNode.h"
 #include "DelayNode.h"
 #include "DynamicsCompressorNode.h"
 #include "GainNode.h"
 #include "IIRFilterNode.h"
 #include "MediaElementAudioSourceNode.h"
 #include "MediaStreamAudioDestinationNode.h"
 #include "MediaStreamAudioSourceNode.h"
+#include "MediaStreamTrackAudioSourceNode.h"
 #include "MediaStreamGraph.h"
 #include "nsContentUtils.h"
 #include "nsNetCID.h"
 #include "nsNetUtil.h"
 #include "nsPIDOMWindow.h"
 #include "nsPrintfCString.h"
 #include "nsRFPService.h"
 #include "OscillatorNode.h"
@@ -388,16 +390,26 @@ AudioContext::CreateMediaStreamSource(DO
                                       ErrorResult& aRv)
 {
   MediaStreamAudioSourceOptions options;
   options.mMediaStream = aMediaStream;
 
   return MediaStreamAudioSourceNode::Create(*this, options, aRv);
 }
 
+already_AddRefed<MediaStreamTrackAudioSourceNode>
+AudioContext::CreateMediaStreamTrackSource(MediaStreamTrack& aMediaStreamTrack,
+                                           ErrorResult& aRv)
+{
+  MediaStreamTrackAudioSourceOptions options;
+  options.mMediaStreamTrack = aMediaStreamTrack;
+
+  return MediaStreamTrackAudioSourceNode::Create(*this, options, aRv);
+}
+
 already_AddRefed<GainNode>
 AudioContext::CreateGain(ErrorResult& aRv)
 {
   return GainNode::Create(*this, GainOptions(), aRv);
 }
 
 already_AddRefed<WaveShaperNode>
 AudioContext::CreateWaveShaper(ErrorResult& aRv)

--- a/dom/media/webaudio/AudioContext.h
+++ b/dom/media/webaudio/AudioContext.h
@@ -59,16 +59,18 @@ class DelayNode;
 class DynamicsCompressorNode;
 class GainNode;
 class GlobalObject;
 class HTMLMediaElement;
 class IIRFilterNode;
 class MediaElementAudioSourceNode;
 class MediaStreamAudioDestinationNode;
 class MediaStreamAudioSourceNode;
+class MediaStreamTrack;
+class MediaStreamTrackAudioSourceNode;
 class OscillatorNode;
 class PannerNode;
 class ScriptProcessorNode;
 class StereoPannerNode;
 class WaveShaperNode;
 class PeriodicWave;
 struct PeriodicWaveConstraints;
 class Promise;
@@ -230,16 +232,18 @@ public:
 
   already_AddRefed<WaveShaperNode>
   CreateWaveShaper(ErrorResult& aRv);
 
   already_AddRefed<MediaElementAudioSourceNode>
   CreateMediaElementSource(HTMLMediaElement& aMediaElement, ErrorResult& aRv);
   already_AddRefed<MediaStreamAudioSourceNode>
   CreateMediaStreamSource(DOMMediaStream& aMediaStream, ErrorResult& aRv);
+  already_AddRefed<MediaStreamTrackAudioSourceNode>
+  CreateMediaStreamTrackSource(MediaStreamTrack& aMediaStreamTrack, ErrorResult& aRv);
 
   already_AddRefed<DelayNode>
   CreateDelay(double aMaxDelayTime, ErrorResult& aRv);
 
   already_AddRefed<PannerNode>
   CreatePanner(ErrorResult& aRv);
 
   already_AddRefed<ConvolverNode>
@@ -373,9 +377,8 @@ private:
 };
 
 static const dom::AudioContext::AudioContextId NO_AUDIO_CONTEXT = 0;
 
 } // namespace dom
 } // namespace mozilla
 
 #endif
-

--- a/dom/webidl/AudioContext.webidl
+++ b/dom/webidl/AudioContext.webidl
@@ -23,13 +23,14 @@ interface AudioContext : BaseAudioContex
     Promise<void> close();
 
     [NewObject, Throws, UnsafeInPrerendering]
     MediaElementAudioSourceNode createMediaElementSource(HTMLMediaElement mediaElement);
 
     [NewObject, Throws, UnsafeInPrerendering]
     MediaStreamAudioSourceNode createMediaStreamSource(MediaStream mediaStream);
 
-    // Bug 1324548: MediaStreamTrackAudioSourceNode createMediaStreamTrackSource (AudioMediaStreamTrack mediaStreamTrack);
+	[NewObject, Throws, UnsafeInPrerendering]
+    MediaStreamTrackAudioSourceNode createMediaStreamTrackSource(MediaStreamTrack mediaStreamTrack);
 
     [NewObject, Throws]
     MediaStreamAudioDestinationNode createMediaStreamDestination();
 };