make menus, bubbles, etc. top level windows on aura

ui/aura/root_window_host_win.cc

 // Copyright (c) 2012 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 "ui/aura/root_window_host_win.h"
 
 #include <windows.h>
 
 #include <algorithm>
 
@@ skipping 236 matching lines @@
 
 void RootWindowHostWin::OnDeviceScaleFactorChanged(
     float device_scale_factor) {
   NOTIMPLEMENTED();
 }
 
 void RootWindowHostWin::PrepareForShutdown() {
   NOTIMPLEMENTED();
 }
 
+void RootWindowHostWin::SetHostWindowExpansion(const gfx::Rect& extra) {
+  NOTIMPLEMENTED();
+}
+
 void RootWindowHostWin::OnClose() {
   // TODO: this obviously shouldn't be here.
   MessageLoopForUI::current()->Quit();
 }
 
 LRESULT RootWindowHostWin::OnKeyEvent(UINT message,
                                       WPARAM w_param,
                                       LPARAM l_param) {
   MSG msg = { hwnd(), message, w_param, l_param };
   ui::KeyEvent keyev(msg, message == WM_CHAR);
@@ skipping 52 matching lines @@
 namespace test {
 
 // static
 void SetUsePopupAsRootWindowForTest(bool use) {
   use_popup_as_root_window_for_test = use;
 }
 
 }  // namespace test
 
 }  // namespace aura