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// 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 "base/prefs/scoped_user_pref_update.h"
#include "base/logging.h"
#include "base/prefs/pref_notifier.h"
#include "base/prefs/pref_service.h"
namespace subtle {
ScopedUserPrefUpdateBase::ScopedUserPrefUpdateBase(PrefService* service,
const std::string& path)
: service_(service), path_(path), value_(NULL) {
DCHECK(service_->CalledOnValidThread());
}
ScopedUserPrefUpdateBase::~ScopedUserPrefUpdateBase() {
Notify();
}
base::Value* ScopedUserPrefUpdateBase::GetValueOfType(base::Value::Type type) {
DCHECK(CalledOnValidThread());
if (!value_)
value_ = service_->GetMutableUserPref(path_, type);
return value_;
}
void ScopedUserPrefUpdateBase::Notify() {
if (value_) {
service_->ReportUserPrefChanged(path_);
value_ = NULL;
}
}
} // namespace subtle
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