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

ui/base/win/window_impl.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/base/win/window_impl.h"
 
 #include <list>
 
 #include "base/debug/alias.h"
 #include "base/memory/singleton.h"
 #include "base/string_number_conversions.h"
 #include "base/win/wrapped_window_proc.h"
 #include "ui/base/win/hwnd_util.h"
 
-namespace {
-
-extern "C" {
-  typedef HWND (*GetRootWindow)();
-}
-
-HMODULE GetMetroDll() {
-  static HMODULE hm = ::GetModuleHandleA("metro_driver.dll");
-  return hm;
-}
-
-HWND RootWindow(bool is_child_window) {
-  HMODULE metro = GetMetroDll();
-  if (!metro) {
-    return is_child_window ? ::GetDesktopWindow() : HWND_DESKTOP;
-  }
-  GetRootWindow get_root_window =
-      reinterpret_cast<GetRootWindow>(::GetProcAddress(metro, "GetRootWindow"));
-  return get_root_window();
-}
-
-}  // namespace
-
 namespace ui {
 
 static const DWORD kWindowDefaultChildStyle =
     WS_CHILD | WS_VISIBLE | WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
 static const DWORD kWindowDefaultStyle = WS_OVERLAPPEDWINDOW;
 static const DWORD kWindowDefaultExStyle = 0;
 
 ///////////////////////////////////////////////////////////////////////////////
 // WindowImpl class tracking.
 
@@ skipping 109 matching lines @@
     ui::SetWindowUserData(hwnd_, NULL);
 }
 
 void WindowImpl::Init(HWND parent, const gfx::Rect& bounds) {
   if (window_style_ == 0)
     window_style_ = parent ? kWindowDefaultChildStyle : kWindowDefaultStyle;
 
   if (parent == HWND_DESKTOP) {
     // Only non-child windows can have HWND_DESKTOP (0) as their parent.
     CHECK((window_style_ & WS_CHILD) == 0);
-    parent = RootWindow(false);
+    parent = GetWindowToParentTo(false);
   } else if (parent == ::GetDesktopWindow()) {
     // Any type of window can have the "Desktop Window" as their parent.
-    parent = RootWindow(true);
+    parent = GetWindowToParentTo(true);
   } else if (parent != HWND_MESSAGE) {
     CHECK(::IsWindow(parent));
   }
 
   int x, y, width, height;
   if (bounds.IsEmpty()) {
     x = y = width = height = CW_USEDEFAULT;
   } else {
     x = bounds.x();
     y = bounds.y();
@@ skipping 99 matching lines @@
   };
   ATOM atom = RegisterClassEx(&class_ex);
   CHECK(atom) << GetLastError();
 
   ClassRegistrar::GetInstance()->RegisterClass(class_info, name, atom);
 
   return name;
 }
 
 }  // namespace ui