Add FilePath setter/getter to pref service....

chrome/browser/download/download_manager.cc

 // Copyright (c) 2006-2008 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.
 
 #include "chrome/browser/download/download_manager.h"
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/path_service.h"
@@ skipping 284 matching lines @@
   prefs->RegisterBooleanPref(prefs::kPromptForDownload, false);
   prefs->RegisterStringPref(prefs::kDownloadExtensionsToOpen, L"");
   prefs->RegisterBooleanPref(prefs::kDownloadDirUpgraded, false);
 
   // The default download path is userprofile\download.
   FilePath default_download_path;
   if (!PathService::Get(chrome::DIR_DEFAULT_DOWNLOADS,
                         &default_download_path)) {
     NOTREACHED();
   }
-  prefs->RegisterStringPref(prefs::kDownloadDefaultDirectory,
-                            default_download_path.ToWStringHack());
+  prefs->RegisterFilePathPref(prefs::kDownloadDefaultDirectory,
+                              default_download_path);
 
   // If the download path is dangerous we forcefully reset it. But if we do
   // so we set a flag to make sure we only do it once, to avoid fighting
   // the user if he really wants it on an unsafe place such as the desktop.
 
   if (!prefs->GetBoolean(prefs::kDownloadDirUpgraded)) {
     FilePath current_download_dir = FilePath::FromWStringHack(
         prefs->GetString(prefs::kDownloadDefaultDirectory));
     if (DownloadPathIsDangerous(current_download_dir)) {
       prefs->SetString(prefs::kDownloadDefaultDirectory,
@@ skipping 1113 matching lines @@
       searched_downloads.push_back(dit->second);
   }
 
   requestor->SetDownloads(searched_downloads);
 }
 
 // Clears the last download path, used to initialize "save as" dialogs.
 void DownloadManager::ClearLastDownloadPath() {
   last_download_path_ = FilePath();
 }