--- a/dom/html/HTMLMediaElement.h
+++ b/dom/html/HTMLMediaElement.h
@@ -216,19 +216,19 @@ public:
 
   // Called to indicate the download is progressing.
   virtual void DownloadProgressed() final override;
 
   // Called by the media decoder to indicate whether the media cache has
   // suspended the channel.
   virtual void NotifySuspendedByCache(bool aSuspendedByCache) final override;
 
-  virtual bool IsActive() const final override;
+  bool IsActive() const;
 
-  virtual bool IsHidden() const final override;
+  bool IsHidden() const;
 
   // Called by the media decoder and the video frame to get the
   // ImageContainer containing the video data.
   virtual VideoFrameContainer* GetVideoFrameContainer() final override;
   layers::ImageContainer* GetImageContainer();
 
   /**
    * Call this to reevaluate whether we should start/stop due to our owner

--- a/dom/media/MediaDecoderOwner.h
+++ b/dom/media/MediaDecoderOwner.h
@@ -113,22 +113,16 @@ public:
     // The next frame of audio/video is unavailable for the decoder is seeking.
     NEXT_FRAME_UNAVAILABLE_SEEKING,
     // The next frame of audio/video is unavailable for some other reasons
     NEXT_FRAME_UNAVAILABLE,
     // Sentinel value
     NEXT_FRAME_UNINITIALIZED
   };
 
-  // Check if the decoder owner is active.
-  virtual bool IsActive() const = 0;
-
-  // Check if the decoder owner is hidden.
-  virtual bool IsHidden() const = 0;
-
   // Called by media decoder when the audible state changed
   virtual void SetAudibleState(bool aAudible) = 0;
 
   // Notified by the decoder that XPCOM shutdown has begun.
   // The decoder owner should call Shutdown() on the decoder and drop the
   // reference to the decoder to prevent further calls into the decoder.
   virtual void NotifyXPCOMShutdown() = 0;
 

--- a/dom/media/gtest/MockMediaDecoderOwner.h
+++ b/dom/media/gtest/MockMediaDecoderOwner.h
@@ -31,18 +31,16 @@ public:
   void PlaybackEnded() override {}
   void SeekStarted() override {}
   void SeekCompleted() override {}
   void DownloadProgressed() override {}
   void UpdateReadyState() override {}
   void FirstFrameLoaded() override {}
   void DispatchEncrypted(const nsTArray<uint8_t>& aInitData,
                          const nsAString& aInitDataType) override {}
-  bool IsActive() const override { return true; }
-  bool IsHidden() const override { return false; }
   void DownloadSuspended() override {}
   void DownloadResumed(bool aForceNetworkLoading) override {}
   void NotifySuspendedByCache(bool aIsSuspended) override {}
   void NotifyDecoderPrincipalChanged() override {}
   void SetAudibleState(bool aAudible) override {}
   void NotifyXPCOMShutdown() override {}
   AbstractThread* AbstractMainThread() const override
   {