Reland a portion of r215672.

gpu/demos/gles2_book/demo_mip_map_2d.cc

-// 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.
-
-// This is a simple example that demonstrates generating a mipmap chain
-// and rendering with it.
-
-#include "gpu/demos/framework/demo_factory.h"
-#include "gpu/demos/gles2_book/example.h"
-#include "third_party/gles2_book/Chapter_9/MipMap2D/MipMap2D.h"
-
-namespace gpu {
-namespace demos {
-
-namespace gles2_book {
-class MipMap2D : public Example<MMUserData> {
- public:
-  MipMap2D() {
-    RegisterCallbacks(mmInit, NULL, mmDraw, mmShutDown);
-  }
-
-  const wchar_t* Title() const {
-    return L"Mip-Map 2D";
-  }
-};
-}  // namespace gles2_book
-
-Demo* CreateDemo() {
-  return new gles2_book::MipMap2D();
-}
-
-}  // namespace demos
-}  // namespace gpu