Menulist SELECT element should update layout when an OPTION content is changed.

third_party/WebKit/Source/core/html/HTMLSelectElement.cpp

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
@@ skipping 411 matching lines @@
 
 void HTMLSelectElement::childrenChanged(const ChildrenChange& change)
 {
     setRecalcListItems();
     setNeedsValidityCheck();
     m_lastOnChangeSelection.clear();
 
     HTMLFormControlElementWithState::childrenChanged(change);
 }
 
-void HTMLSelectElement::optionElementChildrenChanged()
+void HTMLSelectElement::optionElementChildrenChanged(const HTMLOptionElement& option)
 {
     setNeedsValidityCheck();
     setOptionsChangedOnLayoutObject();
 
     if (layoutObject()) {
+        if (option.selected() && usesMenuList())
+            layoutObject()->updateFromElement();
         if (AXObjectCache* cache = layoutObject()->document().existingAXObjectCache())
             cache->childrenChanged(this);
     }
 }
 
 void HTMLSelectElement::accessKeyAction(bool sendMouseEvents)
 {
     focus();
     dispatchSimulatedClick(nullptr, sendMouseEvents ? SendMouseUpDownEvents : SendNoEvents);
 }
@@ skipping 1625 matching lines @@
 }
 
 void HTMLSelectElement::didMutateSubtree()
 {
     DCHECK(popupIsVisible());
     DCHECK(m_popup);
     m_popup->updateFromElement(PopupMenu::ByDOMChange);
 }
 
 } // namespace blink