Issue 5013 - Use const JsValue and pass reference where applicable

src/WebRequestJsObject.cpp

Index: src/WebRequestJsObject.cpp
===================================================================
--- a/src/WebRequestJsObject.cpp
+++ b/src/WebRequestJsObject.cpp
@@ -24,24 +24,24 @@
 #include "Utils.h"
 #include "WebRequestJsObject.h"
 
 namespace
 {
   class WebRequestThread : public AdblockPlus::Thread
   {
   public:
-    WebRequestThread(const AdblockPlus::JsEnginePtr& jsEngine, const AdblockPlus::JsValueList& arguments)
+    WebRequestThread(const AdblockPlus::JsEnginePtr& jsEngine, const AdblockPlus::JsConstValueList& arguments)
         : Thread(true), jsEngine(jsEngine), url(arguments[0]->AsString())
     {
       if (!url.length())
         throw std::runtime_error("Invalid string passed as first argument to GET");
 
       {
-        AdblockPlus::JsValuePtr headersObj = arguments[1];
+        AdblockPlus::JsConstValuePtr headersObj = arguments[1];
         if (!headersObj->IsObject())
           throw std::runtime_error("Second argument to GET must be an object");
 
         std::vector<std::string> properties = headersObj->GetOwnPropertyNames();
         for (const auto& header : properties)
         {
           std::string headerValue = headersObj->GetProperty(header)->AsString();
           if (header.length() && headerValue.length())
@@ -85,26 +85,26 @@
       params.push_back(resultObject);
       callback->Call(params);
     }
 
   private:
     AdblockPlus::JsEnginePtr jsEngine;
     std::string url;
     AdblockPlus::HeaderList headers;
-    AdblockPlus::JsValuePtr callback;
+    AdblockPlus::JsConstValuePtr callback;
   };
 
   v8::Handle<v8::Value> GETCallback(const v8::Arguments& arguments)
   {
     WebRequestThread* thread;
     try
     {
       AdblockPlus::JsEnginePtr jsEngine = AdblockPlus::JsEngine::FromArguments(arguments);
-      AdblockPlus::JsValueList converted = jsEngine->ConvertArguments(arguments);
+      AdblockPlus::JsConstValueList converted = jsEngine->ConvertArguments(arguments);
       if (converted.size() != 3u)
         throw std::runtime_error("GET requires exactly 3 arguments");
       thread = new WebRequestThread(jsEngine, converted);
     }
     catch (const std::exception& e)
     {
       using AdblockPlus::Utils::ToV8String;
       v8::Isolate* isolate = arguments.GetIsolate();