[bindings] Avoid using custom binding for HTMLOptionsCollection.length attribute

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 51 matching lines @@
 #include "platform/PlatformMouseEvent.h"
 #include "platform/text/PlatformLocale.h"
 
 using namespace WTF::Unicode;
 
 namespace blink {
 
 using namespace HTMLNames;
 
 // Upper limit agreed upon with representatives of Opera and Mozilla.
-static const unsigned maxSelectItems = 10000;
+const unsigned HTMLSelectElement::maxSelectItems = 10000;
 
 HTMLSelectElement::HTMLSelectElement(Document& document, HTMLFormElement* form)
     : HTMLFormControlElementWithState(selectTag, document, form)
     , m_typeAhead(this)
     , m_size(0)
     , m_lastOnChangeIndex(-1)
     , m_activeSelectionAnchorIndex(-1)
     , m_activeSelectionEndIndex(-1)
     , m_isProcessingUserDrivenChange(false)
     , m_multiple(false)
@@ skipping 1697 matching lines @@
     int focusedIndex = activeSelectionEndListIndex();
     if (focusedIndex < 0)
         focusedIndex = firstSelectableListIndex();
     if (focusedIndex < 0)
         return nullptr;
     HTMLElement* focused = listItems()[focusedIndex];
     return isHTMLOptionElement(focused) ? toHTMLOptionElement(focused) : nullptr;
 }
 
 } // namespace