Refactor preference syncing.

chrome/browser/download/save_package.cc

 // 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.
 
 #include "chrome/browser/download/save_package.h"
 
 #include <algorithm>
 
 #include "base/file_path.h"
 #include "base/file_util.h"
@@ skipping 1224 matching lines @@
 // Check whether the preference has the preferred directory for saving file. If
 // not, initialize it with default directory.
 FilePath SavePackage::GetSaveDirPreference(PrefService* prefs) {
   DCHECK(prefs);
 
   if (!prefs->FindPreference(prefs::kSaveFileDefaultDirectory)) {
     DCHECK(prefs->FindPreference(prefs::kDownloadDefaultDirectory));
     FilePath default_save_path = prefs->GetFilePath(
         prefs::kDownloadDefaultDirectory);
     prefs->RegisterFilePathPref(prefs::kSaveFileDefaultDirectory,
-                                default_save_path);
+                                default_save_path,
+                                false /* don't sync pref */);
   }
 
   // Get the directory from preference.
   FilePath save_file_path = prefs->GetFilePath(
       prefs::kSaveFileDefaultDirectory);
   DCHECK(!save_file_path.empty());
 
   return save_file_path;
 }
 
@@ skipping 208 matching lines @@
 }
 
 // SelectFileDialog::Listener interface.
 void SavePackage::FileSelected(const FilePath& path,
                                int index, void* params) {
   ContinueSave(path, index);
 }
 
 void SavePackage::FileSelectionCanceled(void* params) {
 }