--- a/dom/media/MediaDecoderStateMachine.cpp
+++ b/dom/media/MediaDecoderStateMachine.cpp
@@ -1161,23 +1161,23 @@ MediaDecoderStateMachine::SetDormant(boo
   mPendingDormant.reset();
 
   DECODER_LOG("SetDormant=%d", aDormant);
 
   if (aDormant) {
     if (mState == DECODER_STATE_SEEKING) {
       if (mQueuedSeek.Exists()) {
         // Keep latest seek target
-      } else if (mSeekTask && mSeekTask->Exists()) {
+      } else if (mCurrentSeek.Exists()) {
         // Because both audio and video decoders are going to be reset in this
         // method later, we treat a VideoOnly seek task as a normal Accurate
         // seek task so that while it is resumed, both audio and video playback
         // are handled.
-        if (mSeekTask->GetSeekTarget().IsVideoOnly()) {
-          mSeekTask->GetSeekTarget().SetType(SeekTarget::Accurate);
+        if (mCurrentSeek.mTarget.IsVideoOnly()) {
+          mCurrentSeek.mTarget.SetType(SeekTarget::Accurate);
         }
         mQueuedSeek = Move(mCurrentSeek);
         mSeekTaskRequest.DisconnectIfExists();
       } else {
         mQueuedSeek.mTarget = SeekTarget(mCurrentPosition,
                                          SeekTarget::Accurate,
                                          MediaDecoderEventVisibility::Suppressed);
         // XXXbholley - Nobody is listening to this promise. Do we need to pass it

--- a/dom/media/SeekTask.cpp
+++ b/dom/media/SeekTask.cpp
@@ -79,20 +79,9 @@ SeekTask::OwnerThread() const
 
 SeekTarget&
 SeekTask::GetSeekTarget()
 {
   AssertOwnerThread();
   return mTarget;
 }
 
-bool
-SeekTask::Exists() const
-{
-  AssertOwnerThread();
-
-  // mSeekTaskPromise communicates SeekTask and MDSM;
-  // mSeekJob communicates MDSM and MediaDecoder;
-  // Either one exists means the current seek task has yet finished.
-  return !mSeekTaskPromise.IsEmpty() || mSeekJob.Exists();
-}
-
 } // namespace mozilla

--- a/dom/media/SeekTask.h
+++ b/dom/media/SeekTask.h
@@ -53,18 +53,16 @@ public:
   virtual void Discard() = 0;
 
   virtual RefPtr<SeekTaskPromise> Seek(const media::TimeUnit& aDuration) = 0;
 
   virtual bool NeedToResetMDSM() const = 0;
 
   SeekTarget& GetSeekTarget();
 
-  bool Exists() const;
-
 protected:
   SeekTask(const void* aDecoderID,
            AbstractThread* aThread,
            MediaDecoderReaderWrapper* aReader,
            SeekJob& aSeekJob);
 
   virtual ~SeekTask();