Implement FullScreen using top layer.

third_party/WebKit/Source/core/layout/LayoutMenuList.cpp

 /*
  * This file is part of the select element layoutObject in WebCore.
  *
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *               2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 49 matching lines @@
 }
 
 LayoutMenuList::~LayoutMenuList()
 {
 }
 
 // FIXME: Instead of this hack we should add a ShadowRoot to <select> with no insertion point
 // to prevent children from rendering.
 bool LayoutMenuList::isChildAllowed(LayoutObject* object, const ComputedStyle&) const
 {
-    return object->isAnonymous() && !object->isLayoutFullScreen();
+    return object->isAnonymous();
 }
 
 void LayoutMenuList::createInnerBlock()
 {
     if (m_innerBlock) {
         ASSERT(firstChild() == m_innerBlock);
         ASSERT(!m_innerBlock->nextSibling());
         return;
     }
 
@@ skipping 271 matching lines @@
         // space appear on the side of the popup menu.
         return endOfLinePadding;
     }
 
     // If the appearance isn't MenulistPart, then the select is styled (non-native), so
     // we want to return the user specified padding.
     return paddingRight() + m_innerBlock->paddingRight();
 }
 
 } // namespace blink