Issue 5013 - Use const JsValue and pass reference where applicable

include/AdblockPlus/JsEngine.h

Index: include/AdblockPlus/JsEngine.h
===================================================================
--- a/include/AdblockPlus/JsEngine.h
+++ b/include/AdblockPlus/JsEngine.h
@@ -88,17 +88,17 @@
   {
     friend class JsValue;
     friend class JsContext;
 
   public:
     /**
      * Event callback function.
      */
-    typedef std::function<void(const JsValueList& params)> EventCallback;
+    typedef std::function<void(const JsConstValueList& params)> EventCallback;
 
     /**
     * Callback function returning false when current connection is not allowed
     * e.g. because it is a metered connection.
     */
     typedef std::function<bool()> IsConnectionAllowedCallback;
 
     /**
@@ -132,17 +132,17 @@
      */
     void RemoveEventCallback(const std::string& eventName);
 
     /**
      * Triggers an event.
      * @param eventName Event name.
      * @param params Event parameters.
      */
-    void TriggerEvent(const std::string& eventName, const JsValueList& params);
+    void TriggerEvent(const std::string& eventName, const JsConstValueList& 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.
      */
@@ -210,19 +210,19 @@
      * callback associated for global setTimeout method.
      */
     static void ScheduleTimer(const v8::Arguments& arguments);
 
     /**
      * Converts v8 arguments to `JsValue` objects.
      * @param arguments `v8::Arguments` object containing the arguments to
      *        convert.
-     * @return List of arguments converted to `JsValue` objects.
+     * @return List of arguments converted to `const JsValue` objects.
      */
-    JsValueList ConvertArguments(const v8::Arguments& arguments);
+    JsConstValueList ConvertArguments(const v8::Arguments& arguments);
 
     /**
      * @see `SetFileSystem()`.
      */
     FileSystemPtr GetFileSystem() const;
 
     /**
      * Sets the `FileSystem` implementation used for all file I/O.