node: implemented bypassing

app/node/node.h

@@ -896,9 +896,6 @@ public:
     cache_result_ = e;
   }
 
-  bool IsBypassed() const { return bypass_; }
-  void SetBypassed(bool e) { bypass_ = e; }
-
   class ArrayRemoveCommand : public UndoCommand
   {
   public:
@@ -959,6 +956,8 @@ public:
 
   static void SetValueAtTime(const NodeInput &input, const rational &time, const QVariant &value, int track, MultiUndoCommand *command, bool insert_on_all_tracks_if_no_key);
 
+  static const QString kEnabledInput;
+
 protected:
   virtual void Hash(QCryptographicHash& hash, const NodeGlobals &globals, const VideoParams& video_params) const;
 
@@ -1361,8 +1360,6 @@ private:
   QString effect_input_;
   int effect_element_;
 
-  bool bypass_;
-
 private slots:
   /**
    * @brief Slot when a keyframe's time changes to keep the keyframes correctly sorted by time