Fix Clang error on SettingChange.

chrome/browser/protector/setting_change.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/protector/setting_change.h"
+
+namespace protector {
+
+SettingChange::SettingChange() {
+}
+
+SettingChange::~SettingChange() {
+}
+
+bool SettingChange::Init(Protector* protector) {
+  return true;
+}
+
+void SettingChange::Apply(Protector* protector) {
+}
+
+void SettingChange::Discard(Protector* protector) {
+}
+
+}  // namespace protector