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:
+ private:
   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__