binidngs: Make callInternalFunction return MaybeLocal

Source/bindings/core/v8/NPV8Object.cpp

 /*
  * Copyright (C) 2004, 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2007, 2008, 2009 Google, Inc.  All rights reserved.
  * Copyright (C) 2014 Opera Software ASA. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 543 matching lines @@
             "  }"
             "  return props;"
             "});";
         v8::Local<v8::String> source = v8AtomicString(isolate, enumeratorCode);
         v8::Local<v8::Value> result;
         if (!V8ScriptRunner::compileAndRunInternalScript(source, isolate).ToLocal(&result))
             return false;
         ASSERT(result->IsFunction());
         v8::Local<v8::Function> enumerator = v8::Local<v8::Function>::Cast(result);
         v8::Local<v8::Value> argv[] = { obj };
-        v8::Local<v8::Value> propsObj = V8ScriptRunner::callInternalFunction(enumerator, v8::Local<v8::Object>::Cast(result), WTF_ARRAY_LENGTH(argv), argv, isolate);
-        if (propsObj.IsEmpty())
+        v8::Local<v8::Value> propsObj;
+        if (!V8ScriptRunner::callInternalFunction(enumerator, v8::Local<v8::Object>::Cast(result), WTF_ARRAY_LENGTH(argv), argv, isolate).ToLocal(&propsObj))
             return false;
 
         // Convert the results into an array of NPIdentifiers.
         v8::Local<v8::Array> props = v8::Local<v8::Array>::Cast(propsObj);
         *count = props->Length();
         *identifier = static_cast<NPIdentifier*>(calloc(*count, sizeof(NPIdentifier)));
         for (uint32_t i = 0; i < *count; ++i) {
             v8::Local<v8::Value> name = props->Get(v8::Integer::New(isolate, i));
             (*identifier)[i] = getStringIdentifier(v8::Local<v8::String>::Cast(name));
         }
@@ skipping 40 matching lines @@
 
         convertV8ObjectToNPVariant(isolate, resultObject, npObject, result);
         return true;
     }
 
     if (NP_CLASS_STRUCT_VERSION_HAS_CTOR(npObject->_class) && npObject->_class->construct)
         return npObject->_class->construct(npObject, arguments, argumentCount, result);
 
     return false;
 }