Add WebDragData to blink::WebView::dragtargetDrop

third_party/WebKit/Source/core/clipboard/DataObject.h

 /*
  * Copyright (c) 2008, 2009, Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 78 matching lines @@
     // Used for dragging in filesystem from the desktop.
     void setFilesystemId(const String& fileSystemId) { m_filesystemId = fileSystemId; }
     const String& filesystemId() const { ASSERT(!m_filesystemId.isEmpty()); return m_filesystemId; }
 
     // Used to handle files (images) being dragged out.
     void addSharedBuffer(const String& name, PassRefPtr<SharedBuffer>);
 
     int modifiers() const { return m_modifiers; }
     void setModifiers(int modifiers) { m_modifiers = modifiers; }
 
+    bool canReadContent() const { return m_canReadContent; }
+
     DECLARE_TRACE();
 
     WebDragData toWebDragData();
 
 private:
     DataObject();
 
     DataObjectItem* findStringItem(const String& type) const;
     bool internalAddStringItem(DataObjectItem*);
     void internalAddFileItem(DataObjectItem*);
 
     HeapVector<Member<DataObjectItem>> m_itemList;
 
     // State of Shift/Ctrl/Alt/Meta keys and Left/Right/Middle mouse buttons
     int m_modifiers;
     String m_filesystemId;
+
+    bool m_canReadContent;

[dcheng, 2016/03/30 08:40:02]

This shouldn't be necessary, DataTransfer/DataTransferItemList/DataTransferItem
already have an access policy enum:
https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit...

which enforces that only types can be read in dragenter / dragover, etc.

[hush (inactive), 2016/04/06 22:47:51]

Yeah. Removed.

 };
 
 } // namespace blink
 
 #endif