Move download filename determintion into a separate class.

chrome/browser/download/download_file_picker_chromeos.h

-// Copyright (c) 2012 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_DOWNLOAD_FILE_PICKER_CHROMEOS_H__
-#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_PICKER_CHROMEOS_H__
-
-#include "chrome/browser/download/download_file_picker.h"
-
-namespace ui {
-struct SelectedFileInfo;
-}
-
-class DownloadFilePickerChromeOS : public DownloadFilePicker {
- public:
-  DownloadFilePickerChromeOS();
-  virtual ~DownloadFilePickerChromeOS();
-
- private:
-  // SelectFileDialog::Listener implementation.
-  virtual void FileSelected(const base::FilePath& path,
-                            int index,
-                            void* params) OVERRIDE;
-  virtual void FileSelectedWithExtraInfo(
-      const ui::SelectedFileInfo& file_info,
-      int index,
-      void* params) OVERRIDE;
-
-  // DownloadFilePicker implementation.
-  // This looks up the gdata path instead of the temporary local path.
-  virtual void InitSuggestedPath(content::DownloadItem* item,
-                                 const base::FilePath& suggested_path) OVERRIDE;
-
-  DISALLOW_COPY_AND_ASSIGN(DownloadFilePickerChromeOS);
-};
-
-#endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_PICKER_CHROMEOS_H__