Move more dnd related files to ui/base

app/download_file_interface.h

-// Copyright (c) 2009 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 APP_DOWNLOAD_FILE_INTERFACE_H_
-#define APP_DOWNLOAD_FILE_INTERFACE_H_
-#pragma once
-
-#include "build/build_config.h"
-
-#include "base/basictypes.h"
-#include "base/ref_counted.h"
-
-#if defined(OS_WIN)
-#include <objidl.h>
-#endif
-
-class FilePath;
-
-// Defines the interface to observe the status of file download.
-class DownloadFileObserver
-    : public base::RefCountedThreadSafe<DownloadFileObserver> {
- public:
-  virtual void OnDownloadCompleted(const FilePath& file_path) = 0;
-  virtual void OnDownloadAborted() = 0;
-
- protected:
-  friend class base::RefCountedThreadSafe<DownloadFileObserver>;
-  virtual ~DownloadFileObserver() {}
-};
-
-// Defines the interface to control how a file is downloaded.
-class DownloadFileProvider
-    : public base::RefCountedThreadSafe<DownloadFileProvider> {
- public:
-  virtual bool Start(DownloadFileObserver* observer) = 0;
-  virtual void Stop() = 0;
-#if defined(OS_WIN)
-  virtual IStream* GetStream() = 0;
-#endif
-
- protected:
-  friend class base::RefCountedThreadSafe<DownloadFileProvider>;
-  virtual ~DownloadFileProvider() {}
-};
-
-#endif  // APP_DOWNLOAD_FILE_INTERFACE_H_