Fullscreen can't use the desktop as a parent in metro mode

content/browser/renderer_host/render_widget_host_view_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 "content/browser/renderer_host/render_widget_host_view_win.h"
 
 #include <algorithm>
 #include <peninputpanel_i.c>
 
 #include "base/bind.h"
@@ skipping 374 matching lines @@
   close_on_deactivate_ = true;
   DoPopupOrFullscreenInit(parent_host_view->GetNativeView(), pos,
                           WS_EX_TOOLWINDOW);
 }
 
 void RenderWidgetHostViewWin::InitAsFullscreen(
     RenderWidgetHostView* reference_host_view) {
   gfx::Rect pos = gfx::Screen::GetMonitorNearestWindow(
       reference_host_view->GetNativeView()).bounds();
   is_fullscreen_ = true;
-  DoPopupOrFullscreenInit(GetDesktopWindow(), pos, 0);
+  DoPopupOrFullscreenInit(ui::GetWindowToParentTo(true), pos, 0);
 }
 
 RenderWidgetHost* RenderWidgetHostViewWin::GetRenderWidgetHost() const {
   return render_widget_host_;
 }
 
 void RenderWidgetHostViewWin::DidBecomeSelected() {
   if (!is_hidden_)
     return;
 
@@ skipping 255 matching lines @@
   NOTREACHED();
 }
 
 bool RenderWidgetHostViewWin::HasFocus() const {
   return ::GetFocus() == m_hWnd;
 }
 
 void RenderWidgetHostViewWin::Show() {
   if (!is_fullscreen_) {
     DCHECK(parent_hwnd_);
-    DCHECK(parent_hwnd_ != GetDesktopWindow());
+    DCHECK(parent_hwnd_ != ui::GetWindowToParentTo(true));
     SetParent(parent_hwnd_);
   }
   ShowWindow(SW_SHOW);
 
   DidBecomeSelected();
 }
 
 void RenderWidgetHostViewWin::Hide() {
-  if (!is_fullscreen_ && GetParent() == GetDesktopWindow()) {
+  if (!is_fullscreen_ && GetParent() == ui::GetWindowToParentTo(true)) {
     LOG(WARNING) << "Hide() called twice in a row: " << this << ":" <<
         parent_hwnd_ << ":" << GetParent();
     return;
   }
 
   if (::GetFocus() == m_hWnd)
     ::SetFocus(NULL);
   ShowWindow(SW_HIDE);
 
   if (!is_fullscreen_) {
@@ skipping 2009 matching lines @@
 void RenderWidgetHostViewWin::ResetPointerDownContext() {
   // If the default focus on the page is on an edit field and we did not
   // receive a focus change in the context of a pointer down message, it means
   // that the pointer down message occurred on the edit field and we should
   // display the on screen keyboard
   if (!received_focus_change_after_pointer_down_ && virtual_keyboard_)
     DisplayOnScreenKeyboardIfNeeded();
   received_focus_change_after_pointer_down_ = false;
   pointer_down_context_ = false;
 }