Add WebDragData to blink::WebView::dragtargetDrop

third_party/WebKit/Source/core/page/DragData.cpp

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2013 Google Inc.
  *
  * 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
@@ skipping 65 matching lines @@
 
 int DragData::modifiers() const
 {
     return m_platformDragData->modifiers();
 }
 
 void DragData::asFilePaths(Vector<String>& result) const
 {
     const Vector<String>& filenames = m_platformDragData->filenames();
     for (size_t i = 0; i < filenames.size(); ++i) {
-        if (!filenames[i].isEmpty())
+        // When the content cannot be read, the filenames will all be empty.
+        if (!m_platformDragData->canReadContent() || !filenames[i].isEmpty())
             result.append(filenames[i]);
     }
 }
 
 bool DragData::containsPlainText() const
 {
     return m_platformDragData->types().contains(mimeTypeTextPlain);
 }
 
 String DragData::asPlainText() const
@@ skipping 47 matching lines @@
 
     return nullptr;
 }
 
 String DragData::droppedFileSystemId() const
 {
     return m_platformDragData->filesystemId();
 }
 
 } // namespace blink