Some refactoring of global JavaScript objects

include/AdblockPlus/JsEngine.h

 #ifndef ADBLOCKPLUS_JS_ENGINE_H
 #define ADBLOCKPLUS_JS_ENGINE_H
 
 #include <stdexcept>
 #include <string>
 #include <v8.h>
 #include <AdblockPlus/JsValue.h>
 
 namespace AdblockPlus
 {
@@ skipping 24 matching lines @@
     JsValuePtr NewValue(int64_t val);
     JsValuePtr NewValue(bool val);
     inline JsValuePtr NewValue(const char* val)
     {
       return NewValue(std::string(val));
     }
     inline JsValuePtr NewValue(int val)
     {
       return NewValue((int64_t)val);
     }
+    JsValuePtr NewObject();
+    static JsEngine& FromArguments(const v8::Arguments& arguments);
+    JsValueList ConvertArguments(const v8::Arguments& arguments);
+
+    inline FileSystem& GetFileSystem()
+    {
+      return fileSystem;
+    }
+    inline WebRequest& GetWebRequest()
+    {
+      return webRequest;
+    }
+    inline ErrorCallback& GetErrorCallback()
+    {
+      return errorCallback;
+    }
 
     class Context
     {
     public:
       Context(const JsEngine& jsEngine);
       virtual inline ~Context() {};
 
     private:
       const v8::Locker locker;
       const v8::HandleScope handleScope;
       const v8::Context::Scope contextScope;
     };
 
   private:
-    const FileSystem* const fileSystem;
+    FileSystem& fileSystem;
+    WebRequest& webRequest;
+    ErrorCallback& errorCallback;
     v8::Isolate* isolate;
     v8::Persistent<v8::Context> context;
   };
 }
 
 #endif