Add Autofill preview support for <select> input fields

Source/core/rendering/RenderMenuList.cpp

 /*
  * This file is part of the select element renderer 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 183 matching lines @@
         setNeedsLayoutAndPrefWidthsRecalc();
 }
 
 void RenderMenuList::updateFromElement()
 {
     if (m_optionsChanged) {
         updateOptionsWidth();
         m_optionsChanged = false;
     }
 
-    if (m_popupIsVisible)
+    if (m_popupIsVisible) {
         m_popup->updateFromElement();
-    else
-        setTextFromOption(selectElement()->selectedIndex());
+    } else {
+        if (selectElement()->suggestedIndex() >= 0)
+            setTextFromOption(selectElement()->suggestedIndex());
+        else
+            setTextFromOption(selectElement()->selectedIndex());
+    }
 }
 
 void RenderMenuList::setTextFromOption(int optionIndex)
 {
     HTMLSelectElement* select = selectElement();
     const Vector<HTMLElement*>& listItems = select->listItems();
     int size = listItems.size();
 
     int i = select->optionToListIndex(optionIndex);
     String text = emptyString();
@@ skipping 342 matching lines @@
     HTMLElement* element = listItems[listIndex];
     return isHTMLOptionElement(*element) && toHTMLOptionElement(*element).selected();
 }
 
 void RenderMenuList::setTextFromItem(unsigned listIndex)
 {
     setTextFromOption(selectElement()->listToOptionIndex(listIndex));
 }
 
 }