--- a/dom/media/GraphDriver.cpp
+++ b/dom/media/GraphDriver.cpp
@@ -233,22 +233,16 @@ ThreadedDriver::Start()
     if (NS_SUCCEEDED(rv)) {
       rv = mThread->EventTarget()->Dispatch(event.forget(), NS_DISPATCH_NORMAL);
       mScheduled = NS_SUCCEEDED(rv);
     }
   }
 }
 
 void
-ThreadedDriver::Resume()
-{
-  Start();
-}
-
-void
 ThreadedDriver::Revive()
 {
   // Note: only called on MainThread, without monitor
   // We know were weren't in a running state
   LOG(LogLevel::Debug, ("AudioCallbackDriver reviving."));
   // If we were switching, switch now. Otherwise, tell thread to run the main
   // loop again.
   MonitorAutoLock mon(mGraphImpl->GetMonitor());
@@ -768,26 +762,16 @@ void
 AudioCallbackDriver::Destroy()
 {
   LOG(LogLevel::Debug, ("AudioCallbackDriver destroyed."));
   mAudioInput = nullptr;
   mAudioStream.reset();
 }
 
 void
-AudioCallbackDriver::Resume()
-{
-  LOG(LogLevel::Debug,
-      ("Resuming audio threads for MediaStreamGraph %p", mGraphImpl));
-  if (cubeb_stream_start(mAudioStream) != CUBEB_OK) {
-    NS_WARNING("Could not start cubeb stream for MSG.");
-  }
-}
-
-void
 AudioCallbackDriver::Start()
 {
   if (mPreviousDriver) {
     if (mPreviousDriver->AsAudioCallbackDriver()) {
       LOG(LogLevel::Debug, ("Releasing audio driver off main thread."));
       RefPtr<AsyncCubebTask> releaseEvent =
         new AsyncCubebTask(mPreviousDriver->AsAudioCallbackDriver(),
                            AsyncCubebOperation::SHUTDOWN);

--- a/dom/media/GraphDriver.h
+++ b/dom/media/GraphDriver.h
@@ -119,18 +119,16 @@ public:
   virtual void WaitForNextIteration() = 0;
   /* Wakes up the graph if it is waiting. */
   virtual void WakeUp() = 0;
   virtual void Destroy() {}
   /* Start the graph, init the driver, start the thread. */
   virtual void Start() = 0;
   /* Stop the graph, shutting down the thread. */
   virtual void Stop() = 0;
-  /* Resume after a stop */
-  virtual void Resume() = 0;
   /* Revive this driver, as more messages just arrived. */
   virtual void Revive() = 0;
   /* Remove Mixer callbacks when switching */
   virtual void RemoveCallback() = 0;
   /* Shutdown GraphDriver (synchronously) */
   void Shutdown();
   /* Rate at which the GraphDriver runs, in ms. This can either be user
    * controlled (because we are using a {System,Offline}ClockDriver, and decide
@@ -270,17 +268,16 @@ class MediaStreamGraphInitThreadRunnable
  */
 class ThreadedDriver : public GraphDriver
 {
 public:
   explicit ThreadedDriver(MediaStreamGraphImpl* aGraphImpl);
   virtual ~ThreadedDriver();
   void Start() override;
   void Stop() override;
-  void Resume() override;
   void Revive() override;
   void RemoveCallback() override;
   /**
    * Runs main control loop on the graph thread. Normally a single invocation
    * of this runs for the entire lifetime of the graph thread.
    */
   void RunThread();
   friend class MediaStreamGraphInitThreadRunnable;
@@ -392,17 +389,16 @@ class AudioCallbackDriver : public Graph
 {
 public:
   explicit AudioCallbackDriver(MediaStreamGraphImpl* aGraphImpl);
   virtual ~AudioCallbackDriver();
 
   void Destroy() override;
   void Start() override;
   void Stop() override;
-  void Resume() override;
   void Revive() override;
   void RemoveCallback() override;
   void WaitForNextIteration() override;
   void WakeUp() override;
 #if defined(XP_WIN)
   void ResetDefaultDevice() override;
 #endif