1// Copyright 2014 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#include "extensions/shell/browser/desktop_controller.h" 6 7#include "base/logging.h" 8#include "base/macros.h" 9 10namespace extensions { 11namespace { 12 13DesktopController* g_instance = NULL; 14 15} // namespace 16 17// static 18DesktopController* DesktopController::instance() { 19 return g_instance; 20} 21 22DesktopController::DesktopController() { 23 CHECK(!g_instance) << "DesktopController already exists"; 24 g_instance = this; 25} 26 27DesktopController::~DesktopController() { 28 DCHECK(g_instance); 29 g_instance = NULL; 30} 31 32} // namespace extensions 33