Revert 199625 "Remove ENABLE_MESSAGE_CENTER"

trunk/src/ui/message_center/dummy_message_center.cc

-// Copyright (c) 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 "ui/message_center/message_center.h"
-#include "ui/message_center/message_center_switches.h"
-#include "ui/message_center/message_center_util.h"
-
-// This file contains dummy implementation of MessageCenter and used to compile
-// and link with Android and iOS implementations of Chrome which do not have
-// notification systems yet. This is to avoid spreading compile-time flags
-// everywhere in the code.
-#if !defined(OS_ANDROID) && !defined(OS_IOS)
-#error This file should only be used in Android or iOS builds.
-#endif
-
-namespace message_center {
-
-bool IsRichNotificationEnabled() {
-  return false;
-}
-
-// static
-void MessageCenter::Initialize() {
-}
-
-// static
-MessageCenter* MessageCenter::Get() {
-  return NULL;
-}
-
-// static
-void MessageCenter::Shutdown() {
-}
-
-MessageCenter::MessageCenter() {
-}
-
-MessageCenter::~MessageCenter() {
-}
-
-MessageCenter::Delegate::~Delegate() {
-}
-
-}  // namespace message_center