[nacltoons] Rename core classes in accordance with doc.

nacltoons/src/gameplay_scene.h

-// 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.
-#ifndef GAMEPLAY_SCENE_H_
-#define GAMEPLAY_SCENE_H_
-
-#include "cocos2d.h"
-
-USING_NS_CC;
-
-/**
- * Main gameplay scene containing the physics layer
- * that the user can interact with and a UI layer over
- * the top for menus.
- */
-class GameplayScene : public CCScene {
- public:
-  GameplayScene(int level_number) : level_number_(level_number) {}
-  ~GameplayScene() {}
-  static GameplayScene* create(int level_number);
-  virtual bool init();
-  void Restart();
-  void GameOver(bool success);
- private:
-  int level_number_;
-};
-
-/**
- * UI layer for displaying menu and information overlays on
- * top of the running game.
- */
-class UILayer : public CCLayer {
- public:
-  UILayer() {}
-  ~UILayer() {}
-  // add static create() method which encapsulates new + init
-  CREATE_FUNC(UILayer);
-  virtual bool init();
-
- private:
-  // menu callbacks
-  void ToggleDebug(CCObject* sender);
-  void Restart(CCObject* sender);
-  void Exit(CCObject* sender);
-};
-
-#endif  // GAMEPLAY_SCENE_H_