SELECT element: Fix a DCHECK failure in optionToBeShown().

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 1127 matching lines @@
 
 void HTMLSelectElement::restoreFormControlState(const FormControlState& state)
 {
     recalcListItems();
 
     const ListItems& items = listItems();
     size_t itemsSize = items.size();
     if (itemsSize == 0)
         return;
 
-    for (auto& item : items) {
-        if (isHTMLOptionElement(item))
-            toHTMLOptionElement(item)->setSelectedState(false);
-    }
+    selectOption(nullptr, DeselectOtherOptions);
 
     // The saved state should have at least one value and an index.
     ASSERT(state.valueSize() >= 2);
     if (!multiple()) {
         size_t index = state[1].toUInt();
         if (index < itemsSize && isHTMLOptionElement(items[index]) && toHTMLOptionElement(items[index])->value() == state[0]) {
             toHTMLOptionElement(items[index])->setSelectedState(true);
             toHTMLOptionElement(items[index])->setDirty(true);
             m_lastOnChangeOption = toHTMLOptionElement(items[index]);
         } else {
@@ skipping 896 matching lines @@
 }
 
 void HTMLSelectElement::didMutateSubtree()
 {
     DCHECK(popupIsVisible());
     DCHECK(m_popup);
     m_popup->updateFromElement(PopupMenu::ByDOMChange);
 }
 
 } // namespace blink