Reduce usage of v8::Isolate::GetCurrent() in NPV8Object

Source/bindings/v8/V8NPObject.cpp

Index: Source/bindings/v8/V8NPObject.cpp
diff --git a/Source/bindings/v8/V8NPObject.cpp b/Source/bindings/v8/V8NPObject.cpp
index 200c40752d7abce556893a55f41e4d6e178b8c45..00eaed8137e1540de1b00541d9003b5aa5fe4afc 100644
--- a/Source/bindings/v8/V8NPObject.cpp
+++ b/Source/bindings/v8/V8NPObject.cpp
@@ -111,7 +111,7 @@ static void npObjectInvokeImpl(const v8::FunctionCallbackInfo<v8::Value>& args,
     OwnArrayPtr<NPVariant> npArgs = adoptArrayPtr(new NPVariant[numArgs]);
 
     for (int i = 0; i < numArgs; i++)
-        convertV8ObjectToNPVariant(args[i], npObject, &npArgs[i]);
+        convertV8ObjectToNPVariant(args[i], npObject, &npArgs[i], args.GetIsolate());
 
     NPVariant result;
     VOID_TO_NPVARIANT(result);
@@ -320,7 +320,7 @@ static v8::Handle<v8::Value> npObjectSetProperty(v8::Local<v8::Object> self, NPI
 
         NPVariant npValue;
         VOID_TO_NPVARIANT(npValue);
-        convertV8ObjectToNPVariant(value, npObject, &npValue);
+        convertV8ObjectToNPVariant(value, npObject, &npValue, isolate);
         bool success = npObject->_class->setProperty(npObject, identifier, &npValue);
         _NPN_ReleaseVariantValue(&npValue);
         if (success)