Bug 1329891. Part 2 - default Handle{Audio,Video}Decoded to crash. r=kikuo

States expect this event should override this function.

MozReview-Commit-ID: 8Y4ngn4X7MS

--HG--
extra : rebase_source : 705affda97d3ee919f560a76c3858fa3564bfbe4
extra : intermediate-source : 9139df5e241af72bc75544ae3d1df27a7cc514aa
extra : source : b7c803ea73a1b1af0ee40a64d7710c52186c3c25

dom/media/MediaDecoderStateMachine.cpp

@@ -192,8 +192,14 @@ public:
 
   // Event handlers for various events.
   virtual void HandleCDMProxyReady() {}
-  virtual void HandleAudioDecoded(MediaData* aAudio) {}
-  virtual void HandleVideoDecoded(MediaData* aVideo, TimeStamp aDecodeStart) {}
+  virtual void HandleAudioDecoded(MediaData* aAudio)
+  {
+    Crash("Unexpected event!", __func__);
+  }
+  virtual void HandleVideoDecoded(MediaData* aVideo, TimeStamp aDecodeStart)
+  {
+    Crash("Unexpected event!", __func__);
+  }
   virtual void HandleAudioWaited(MediaData::Type aType);
   virtual void HandleVideoWaited(MediaData::Type aType);
   virtual void HandleNotWaited(const WaitForDataRejectValue& aRejection);