--- a/dom/media/MediaDecoderStateMachine.cpp
+++ b/dom/media/MediaDecoderStateMachine.cpp
@@ -190,21 +190,17 @@ public:
   virtual ~StateObject() {}
   virtual void Exit() {};  // Exit action.
   virtual void Step() {}   // Perform a 'cycle' of this state object.
   virtual State GetState() const = 0;
 
   // Event handlers for various events.
   virtual void HandleCDMProxyReady() {}
   virtual void HandleAudioDecoded(MediaData* aAudio) {}
-
-  virtual bool HandleVideoDecoded(MediaData* aVideo, TimeStamp aDecodeStart)
-  {
-    return false;
-  }
+  virtual void HandleVideoDecoded(MediaData* aVideo, TimeStamp aDecodeStart) {}
 
   virtual bool HandleEndOfStream() { return false; }
 
   virtual bool HandleWaitingForData() { return false; }
 
   virtual RefPtr<MediaDecoder::SeekPromise> HandleSeek(SeekTarget aTarget) = 0;
 
   virtual bool HandleAudioCaptured() { return false; }
@@ -479,21 +475,20 @@ public:
   }
 
   void HandleAudioDecoded(MediaData* aAudio) override
   {
     mMaster->Push(aAudio, MediaData::AUDIO_DATA);
     MaybeFinishDecodeFirstFrame();
   }
 
-  bool HandleVideoDecoded(MediaData* aVideo, TimeStamp aDecodeStart) override
+  void HandleVideoDecoded(MediaData* aVideo, TimeStamp aDecodeStart) override
   {
     mMaster->Push(aVideo, MediaData::VIDEO_DATA);
     MaybeFinishDecodeFirstFrame();
-    return true;
   }
 
   bool HandleEndOfStream() override
   {
     MaybeFinishDecodeFirstFrame();
     return true;
   }
 
@@ -578,22 +573,21 @@ public:
   }
 
   void HandleAudioDecoded(MediaData* aAudio) override
   {
     mMaster->Push(aAudio, MediaData::AUDIO_DATA);
     MaybeStopPrerolling();
   }
 
-  bool HandleVideoDecoded(MediaData* aVideo, TimeStamp aDecodeStart) override
+  void HandleVideoDecoded(MediaData* aVideo, TimeStamp aDecodeStart) override
   {
     mMaster->Push(aVideo, MediaData::VIDEO_DATA);
     MaybeStopPrerolling();
     CheckSlowDecoding(aDecodeStart);
-    return true;
   }
 
   RefPtr<MediaDecoder::SeekPromise> HandleSeek(SeekTarget aTarget) override;
 
   bool HandleEndOfStream() override;
 
   bool HandleWaitingForData() override
   {
@@ -850,20 +844,19 @@ public:
     return DECODER_STATE_SEEKING;
   }
 
   void HandleAudioDecoded(MediaData* aAudio) override
   {
     MOZ_ASSERT(false);
   }
 
-  bool HandleVideoDecoded(MediaData* aVideo, TimeStamp aDecodeStart) override
+  void HandleVideoDecoded(MediaData* aVideo, TimeStamp aDecodeStart) override
   {
     MOZ_ASSERT(false);
-    return true;
   }
 
   RefPtr<MediaDecoder::SeekPromise> HandleSeek(SeekTarget aTarget) override;
 
   void HandleVideoSuspendTimeout() override
   {
     // Do nothing since we want a valid video frame to show when seek is done.
   }
@@ -965,23 +958,22 @@ public:
   void HandleAudioDecoded(MediaData* aAudio) override
   {
     // This might be the sample we need to exit buffering.
     // Schedule Step() to check it.
     mMaster->Push(aAudio, MediaData::AUDIO_DATA);
     mMaster->ScheduleStateMachine();
   }
 
-  bool HandleVideoDecoded(MediaData* aVideo, TimeStamp aDecodeStart) override
+  void HandleVideoDecoded(MediaData* aVideo, TimeStamp aDecodeStart) override
   {
     // This might be the sample we need to exit buffering.
     // Schedule Step() to check it.
     mMaster->Push(aVideo, MediaData::VIDEO_DATA);
     mMaster->ScheduleStateMachine();
-    return true;
   }
 
   bool HandleEndOfStream() override;
 
   RefPtr<MediaDecoder::SeekPromise> HandleSeek(SeekTarget aTarget) override;
 
   void HandleVideoSuspendTimeout() override
   {