Refactor preference syncing.

chrome/browser/password_manager/password_store_default.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/password_manager/password_store_default.h"
 
 #include <set>
 
 #include "base/logging.h"
 #include "base/stl_util-inl.h"
@@ skipping 76 matching lines @@
   const PasswordForms& forms =
       static_cast<const WDResult<PasswordForms>*>(result)->GetValue();
   for (PasswordForms::const_iterator it = forms.begin();
        it != forms.end(); ++it) {
     password_store_->AddLogin(**it);
     web_data_service_->RemoveLogin(**it);
     delete *it;
   }
   if (handles_.empty()) {
     profile_->GetPrefs()->RegisterBooleanPref(prefs::kLoginDatabaseMigrated,
-                                              true);
+                                              true,
+                                              PrefService::UNSYNCABLE_PREF);
   }
 }
 
 PasswordStoreDefault::PasswordStoreDefault(LoginDatabase* login_db,
                                            Profile* profile,
                                            WebDataService* web_data_service)
     : web_data_service_(web_data_service),
       login_db_(login_db), profile_(profile) {
   DCHECK(login_db);
   DCHECK(profile);
@@ skipping 100 matching lines @@
 }
 
 void PasswordStoreDefault::MigrateIfNecessary() {
   PrefService* prefs = profile_->GetPrefs();
   if (prefs->FindPreference(prefs::kLoginDatabaseMigrated))
     return;
   DCHECK(!migrate_helper_.get());
   migrate_helper_.reset(new MigrateHelper(profile_, web_data_service_, this));
   migrate_helper_->Init();
 }