[NTP] Remove app launch animation.

chrome/browser/app_launched_animation.h

-// Copyright (c) 2010 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 CHROME_BROWSER_APP_LAUNCHED_ANIMATION_H_
-#define CHROME_BROWSER_APP_LAUNCHED_ANIMATION_H_
-#pragma once
-
-#include "base/basictypes.h"
-
-class Extension;
-
-namespace gfx {
-  class Rect;
-}
-
-class AppLaunchedAnimation {
- public:
-  // Starts an animation of the |extension| being launched. The |rect| is the
-  // rect of the app icon.
-  static void Show(const Extension* extension, const gfx::Rect& rect);
-
- private:
-  AppLaunchedAnimation() { }
-
-  DISALLOW_COPY_AND_ASSIGN(AppLaunchedAnimation);
-};
-
-#endif  // CHROME_BROWSER_APP_LAUNCHED_ANIMATION_H_