Issue 5034 - Part 4: JsEngine::Evaluate() return a JsValue

include/AdblockPlus/JsEngine.h

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 128 matching lines @@
      */
     void TriggerEvent(const std::string& eventName, const JsValueList& params);
 
     /**
      * Evaluates a JavaScript expression.
      * @param source JavaScript expression to evaluate.
      * @param filename Optional file name for the expression, used in error
      *        messages.
      * @return Result of the evaluated expression.
      */
-    JsValuePtr Evaluate(const std::string& source,
+    JsValue Evaluate(const std::string& source,
         const std::string& filename = "");
 
     /**
      * Initiates a garbage collection.
      */
     void Gc();
 
     //@{
     /**
      * Creates a new JavaScript value.
@@ skipping 151 matching lines @@
     EventMap eventCallbacks;
     std::mutex eventCallbacksMutex;
     mutable std::mutex isConnectionAllowedMutex;
     IsConnectionAllowedCallback isConnectionAllowed;
     TimerTasks timerTasks;
     TimerPtr timer;
   };
 }
 
 #endif