It is time.

ui/base/dragdrop/download_file_interface.h

-// Copyright (c) 2011 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 UI_BASE_DRAGDROP_DOWNLOAD_FILE_INTERFACE_H_
-#define UI_BASE_DRAGDROP_DOWNLOAD_FILE_INTERFACE_H_
-
-#include "build/build_config.h"
-
-#include "base/basictypes.h"
-#include "base/memory/ref_counted.h"
-
-#include "ui/base/ui_base_export.h"
-
-#if defined(OS_WIN)
-#include <objidl.h>
-#endif
-
-namespace base {
-class FilePath;
-}
-
-namespace ui {
-
-// TODO(benjhayden, anybody): Do these need to be RefCountedThreadSafe?
-
-// Defines the interface to observe the status of file download.
-class UI_BASE_EXPORT DownloadFileObserver
-    : public base::RefCountedThreadSafe<DownloadFileObserver> {
- public:
-  virtual void OnDownloadCompleted(const base::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 UI_BASE_EXPORT DownloadFileProvider
-    : public base::RefCountedThreadSafe<DownloadFileProvider> {
- public:
-  // Starts the download asynchronously and returns immediately.
-  virtual void Start(DownloadFileObserver* observer) = 0;
-
-  // Returns true if the download succeeded and false otherwise. Waits until the
-  // download is completed/cancelled/interrupted before returning.
-  virtual bool Wait() = 0;
-
-  // Cancels the download.
-  virtual void Stop() = 0;
-
- protected:
-  friend class base::RefCountedThreadSafe<DownloadFileProvider>;
-  virtual ~DownloadFileProvider() {}
-};
-
-}  // namespace ui
-
-#endif  // UI_BASE_DRAGDROP_DOWNLOAD_FILE_INTERFACE_H_