Convert Pass()→std::move() in //components/[n-z]*

components/syncable_prefs/pref_service_syncable_factory.cc

 // Copyright 2013 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 "components/syncable_prefs/pref_service_syncable_factory.h"
 
 #include "base/prefs/default_pref_store.h"
 #include "base/prefs/pref_notifier_impl.h"
 #include "base/prefs/pref_value_store.h"
 #include "base/trace_event/trace_event.h"
@@ skipping 49 matching lines @@
                              command_line_prefs_.get(),
                              user_prefs_.get(),
                              recommended_prefs_.get(),
                              pref_registry->defaults().get(),
                              pref_notifier),
           user_prefs_.get(),
           pref_registry,
           pref_model_associator_client_,
           read_error_callback_,
           async_));
-  return pref_service.Pass();
+  return pref_service;
 }
 
 }  // namespace syncable_prefs