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diff --git a/Source/WebCore/dom/DataTransfer.h b/Source/WebCore/dom/DataTransfer.h
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+++ b/Source/WebCore/dom/DataTransfer.h
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+/*
+ * Copyright (C) 2001 Peter Kelly (pmk@post.com)
+ * Copyright (C) 2001 Tobias Anton (anton@stud.fbi.fh-darmstadt.de)
+ * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
+ * Copyright (C) 2003-2016 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#pragma once
+
+#include "CachedResourceHandle.h"
+#include "DataTransferAccessPolicy.h"
+#include "DragActions.h"
+#include "DragImage.h"
+#include "IntPoint.h"
+#include <wtf/text/WTFString.h>
+
+namespace WebCore {
+
+class CachedImage;
+class DragData;
+class DragImageLoader;
+class Element;
+class FileList;
+class Pasteboard;
+
+class DataTransfer : public RefCounted<DataTransfer> {
+public:
+    static Ref<DataTransfer> createForCopyAndPaste(DataTransferAccessPolicy);
+    static Ref<DataTransfer> createForInputEvent(const String& plainText, const String& htmlText);
+
+    WEBCORE_EXPORT ~DataTransfer();
+
+    String dropEffect() const;
+    void setDropEffect(const String&);
+
+    String effectAllowed() const;
+    void setEffectAllowed(const String&);
+
+    Vector<String> types() const;
+
+    FileList& files() const;
+
+    void clearData(const String& type = String());
+
+    String getData(const String& type) const;
+
+    void setData(const String& type, const String& data);
+
+    void setDragImage(Element*, int x, int y);
+
+    void setAccessPolicy(DataTransferAccessPolicy);
+    bool canReadTypes() const;
+    bool canReadData() const;
+    bool canWriteData() const;
+
+    bool hasFileOfType(const String&);
+    bool hasStringOfType(const String&);
+
+    Pasteboard& pasteboard() { return *m_pasteboard; }
+
+#if ENABLE(DRAG_SUPPORT)
+    static Ref<DataTransfer> createForDrag();
+    static Ref<DataTransfer> createForDrop(DataTransferAccessPolicy, const DragData&);
+
+    bool dropEffectIsUninitialized() const { return m_dropEffect == "uninitialized"; }
+
+    DragOperation sourceOperation() const;
+    DragOperation destinationOperation() const;
+    void setSourceOperation(DragOperation);
+    void setDestinationOperation(DragOperation);
+
+    void setDragHasStarted() { m_shouldUpdateDragImage = true; }
+    DragImageRef createDragImage(IntPoint& dragLocation) const;
+    void updateDragImage();
+#endif
+
+private:
+    enum Type { CopyAndPaste, DragAndDrop, InputEvent };
+    DataTransfer(DataTransferAccessPolicy, std::unique_ptr<Pasteboard>, Type = CopyAndPaste, bool forFileDrag = false);
+
+#if ENABLE(DRAG_SUPPORT)
+    bool canSetDragImage() const;
+#endif
+
+    DataTransferAccessPolicy m_policy;
+    std::unique_ptr<Pasteboard> m_pasteboard;
+
+    mutable RefPtr<FileList> m_fileList;
+
+#if ENABLE(DRAG_SUPPORT)
+    bool m_forDrag;
+    bool m_forFileDrag;
+    String m_dropEffect;
+    String m_effectAllowed;
+    bool m_shouldUpdateDragImage;
+    IntPoint m_dragLocation;
+    CachedResourceHandle<CachedImage> m_dragImage;
+    RefPtr<Element> m_dragImageElement;
+    std::unique_ptr<DragImageLoader> m_dragImageLoader;
+#endif
+};
+
+} // namespace WebCore