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diff --git a/chrome/browser/download/drag_download_util.h b/chrome/browser/download/drag_download_util.h
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+++ b/chrome/browser/download/drag_download_util.h
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+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_UTIL_H_
+#define CHROME_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_UTIL_H_
+
+#include "app/download_file_interface.h"
+#include "base/basictypes.h"
+#include "base/ref_counted.h"
+#include "base/string16.h"
+#include "chrome/browser/download/drag_download_file.h"
+
+class FilePath;
+class GURL;
+namespace net {
+class FileStream;
+}
+
+namespace drag_download_util {
+
+// Parse the download metadata set in DataTransfer.setData. The metadata
+// consists of a set of the following values separated by ":"
+// * MIME type
+// * File name
+// * URL
+// If the file name contains special characters, they need to be escaped
+// appropriately.
+// For example, we can have
+//   text/plain:example.txt:http://example.com/example.txt
+bool ParseDownloadMetadata(const string16& metadata,
+                           string16* mime_type,
+                           FilePath* file_name,
+                           GURL* url);
+
+// Create a new file at the specified path. If the file already exists, try to
+// insert the sequential unifier to produce a new file, like foo-01.txt.
+// Return a FileStream if successful.
+net::FileStream* CreateFileStreamForDrop(FilePath* file_path);
+
+// Implementation of DownloadFileObserver to finalize the download process.
+class PromiseFileFinalizer : public DownloadFileObserver {
+ public:
+  explicit PromiseFileFinalizer(DragDownloadFile* drag_file_downloader)
+      : drag_file_downloader_(drag_file_downloader) {
+  }
+  virtual ~PromiseFileFinalizer() { }
+
+  // DownloadFileObserver methods.
+  virtual void OnDownloadCompleted(const FilePath& file_path);
+  virtual void OnDownloadAborted();
+
+ private:
+  void Cleanup();
+
+  scoped_refptr<DragDownloadFile> drag_file_downloader_;
+
+  DISALLOW_COPY_AND_ASSIGN(PromiseFileFinalizer);
+};
+
+}  // namespace drag_download_util
+
+#endif  // CHROME_BROWSER_DOWNLOAD_DRAG_DOWNLOAD_UTIL_H_