Add constructor for DataTransfer

third_party/WebKit/Source/core/clipboard/DataTransfer.cpp

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 91 matching lines @@
   if (cleanType == mimeTypeText || cleanType.startsWith(mimeTypeTextPlainEtc))
     return mimeTypeTextPlain;
   if (cleanType == mimeTypeURL) {
     if (convertToURL)
       *convertToURL = true;
     return mimeTypeTextURIList;
   }
   return cleanType;
 }
 
+DataTransfer* DataTransfer::create() {
+  DataTransfer* data =
+      create(CopyAndPaste, DataTransferWritable, DataObject::create());
+  data->m_dropEffect = "none";
+  data->m_effectAllowed = "none";
+  return data;
+}
+
 DataTransfer* DataTransfer::create(DataTransferType type,
                                    DataTransferAccessPolicy policy,
                                    DataObject* dataObject) {
   return new DataTransfer(type, policy, dataObject);
 }
 
 DataTransfer::~DataTransfer() {}
 
 void DataTransfer::setDropEffect(const String& effect) {
   if (!isForDragAndDrop())
@@ skipping 355 matching lines @@
   }
 }
 
 DEFINE_TRACE(DataTransfer) {
   visitor->trace(m_dataObject);
   visitor->trace(m_dragImage);
   visitor->trace(m_dragImageElement);
 }
 
 }  // namespace blink