ash/public/cpp/tablet_mode.cc

// Copyright 2018 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 "ash/public/cpp/tablet_mode.h"

#include "base/logging.h"

namespace ash {

namespace {
TabletMode* g_instance = nullptr;
}

TabletMode* TabletMode::Get() {
  return g_instance;
}

TabletMode::TabletMode() {
  DCHECK_EQ(nullptr, g_instance);
  g_instance = this;
}

TabletMode::~TabletMode() {
  DCHECK_EQ(this, g_instance);
  g_instance = nullptr;
}

}  // namespace ash