Change PluginWindowHandle to AcceleratedWidget in ui/gfx/gl

gpu/demos/framework/window_mac.mm

 // 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.
 
 #include "gpu/demos/framework/window.h"
 
 namespace gpu {
 namespace demos {
 
 void Window::MainLoop() {
 }
 
 gfx::NativeWindow Window::CreateNativeWindow(const wchar_t* title,
                                              int width, int height) {
   return NULL;
 }
 
-gfx::PluginWindowHandle Window::PluginWindow(gfx::NativeWindow hwnd) {
-  return gfx::kNullPluginWindow;
+gfx::AcceleratedWidget Window::PluginWindow(gfx::NativeWindow hwnd) {
+  return gfx::kNullAcceleratedWidget;
 }
 
 }  // namespace demos
 }  // namespace gpu