base: Use std::move() instead of Pass() for real movable types.

base/prefs/default_pref_store.cc

 // 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.
 
 #include "base/prefs/default_pref_store.h"
+
+#include <utility>
+
 #include "base/logging.h"
 
 using base::Value;
 
 DefaultPrefStore::DefaultPrefStore() {}
 
 bool DefaultPrefStore::GetValue(const std::string& key,
                                 const Value** result) const {
   return prefs_.GetValue(key, result);
 }
 
 void DefaultPrefStore::AddObserver(PrefStore::Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void DefaultPrefStore::RemoveObserver(PrefStore::Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
 bool DefaultPrefStore::HasObservers() const {
   return observers_.might_have_observers();
 }
 
 void DefaultPrefStore::SetDefaultValue(const std::string& key,
                                        scoped_ptr<Value> value) {
   DCHECK(!GetValue(key, NULL));
-  prefs_.SetValue(key, value.Pass());
+  prefs_.SetValue(key, std::move(value));
 }
 
 void DefaultPrefStore::ReplaceDefaultValue(const std::string& key,
                                            scoped_ptr<Value> value) {
   const Value* old_value = NULL;
   GetValue(key, &old_value);
   bool notify = !old_value->Equals(value.get());
-  prefs_.SetValue(key, value.Pass());
+  prefs_.SetValue(key, std::move(value));
   if (notify)
     FOR_EACH_OBSERVER(Observer, observers_, OnPrefValueChanged(key));
 }
 
 DefaultPrefStore::const_iterator DefaultPrefStore::begin() const {
   return prefs_.begin();
 }
 
 DefaultPrefStore::const_iterator DefaultPrefStore::end() const {
   return prefs_.end();
 }
 
 DefaultPrefStore::~DefaultPrefStore() {}