Bug 1310140. Part 11 - make StateObject::HandleVideoSuspendTimeout() pure virtual for all sub-classes override it. r=kaku,kamidphish

MozReview-Commit-ID: 2uZHm3NZIFV

--HG--
extra : rebase_source : a6896a66d27a5ec79d9b0ef947d21d4a4d68e540
extra : source : c6f485abfafe186ac2ebf098e1079700e5c9ae8f

dom/media/MediaDecoderStateMachine.cpp

@@ -215,12 +215,7 @@ public:
 
   virtual RefPtr<ShutdownPromise> HandleShutdown();
 
-  virtual void HandleVideoSuspendTimeout()
-  {
-    mMaster->mVideoDecodeSuspended = true;
-    mMaster->mOnPlaybackEvent.Notify(MediaEventType::EnterVideoSuspend);
-    Reader()->SetVideoBlankDecode(true);
-  }
+  virtual void HandleVideoSuspendTimeout() = 0;
 
   virtual void DumpDebugInfo() {}