Issue 5013 - Use const JsValue and pass reference where applicable

include/AdblockPlus/FilterEngine.h

Index: include/AdblockPlus/FilterEngine.h
===================================================================
--- a/include/AdblockPlus/FilterEngine.h
+++ b/include/AdblockPlus/FilterEngine.h
@@ -529,22 +529,22 @@
     int updateCheckId;
     static const std::map<ContentType, std::string> contentTypes;
 
     explicit FilterEngine(const JsEnginePtr& jsEngine);
 
     FilterPtr CheckFilterMatch(const std::string& url,
                                ContentTypeMask contentTypeMask,
                                const std::string& documentUrl) const;
-    void UpdateAvailable(const UpdateAvailableCallback& callback, const JsValueList& params) const;
+    void UpdateAvailable(const UpdateAvailableCallback& callback, const JsConstValueList& params) const;
     void UpdateCheckDone(const std::string& eventName,
-                         const UpdateCheckDoneCallback& callback, const JsValueList& params);
-    void FilterChanged(const FilterChangeCallback& callback, const JsValueList& params) const;
+                         const UpdateCheckDoneCallback& callback, const JsConstValueList& params);
+    void FilterChanged(const FilterChangeCallback& callback, const JsConstValueList& params) const;
     void ShowNotification(const ShowNotificationCallback& callback,
-      const JsValueList& params) const;
+      const JsConstValueList& param) const;
     FilterPtr GetWhitelistingFilter(const std::string& url,
       ContentTypeMask contentTypeMask, const std::string& documentUrl) const;
     FilterPtr GetWhitelistingFilter(const std::string& url,
       ContentTypeMask contentTypeMask,
       const std::vector<std::string>& documentUrls) const;
   };
 }