Shell of implementation for embedded windows. At this point this is

aura/desktop_host_win.cc

+// Copyright (c) 2011 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 "aura/desktop_host_win.h"
+
+#include "aura/desktop.h"
+#include "base/message_loop.h"
+
+namespace aura {
+
+// static
+DesktopHost* DesktopHost::Create(const gfx::Rect& bounds) {
+  return new DesktopHostWin(bounds);
+}
+
+DesktopHostWin::DesktopHostWin(const gfx::Rect& bounds) : desktop_(NULL) {
+  Init(NULL, bounds);
+}
+
+DesktopHostWin::~DesktopHostWin() {
+  DestroyWindow(hwnd());
+}
+
+void DesktopHostWin::SetDesktop(Desktop* desktop) {
+  desktop_ = desktop;
+}
+
+gfx::AcceleratedWidget DesktopHostWin::GetAcceleratedWidget() {
+  return hwnd();
+}
+
+void DesktopHostWin::Show() {
+  ShowWindow(hwnd(), SW_SHOWNORMAL);
+}
+
+gfx::Size DesktopHostWin::GetSize() {
+  RECT r;
+  GetClientRect(hwnd(), &r);
+  return gfx::Rect(r).size();
+}
+
+void DesktopHostWin::OnClose() {
+  // TODO: this obviously shouldn't be here.
+  MessageLoopForUI::current()->Quit();
+}
+
+void DesktopHostWin::OnPaint(HDC dc) {
+  if (desktop_)
+    desktop_->Draw();
+  ValidateRect(hwnd(), NULL);
+}
+
+}  // namespace aura