Uninline HTMLCollection / LiveNodeList's item() and length() member functions

Source/core/html/HTMLCollection.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003-2008, 2011, 2012, 2014 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Samsung Electronics. All rights reserved.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
@@ skipping 173 matching lines @@
         ownerNode().nodeLists()->removeCache(this, type());
 #endif
 }
 
 void HTMLCollection::invalidateCache(Document* oldDocument) const
 {
     m_collectionIndexCache.invalidate();
     invalidateIdNameCacheMaps(oldDocument);
 }
 
+unsigned HTMLCollection::length() const
+{
+    return m_collectionIndexCache.nodeCount(*this);
+}
+
+Element* HTMLCollection::item(unsigned offset) const
+{
+    return m_collectionIndexCache.nodeAt(*this, offset);
+}
+
 static inline bool isMatchingHTMLElement(const HTMLCollection& htmlCollection, const HTMLElement& element)
 {
     switch (htmlCollection.type()) {
     case DocImages:
         return element.hasTagName(imgTag);
     case DocScripts:
         return element.hasTagName(scriptTag);
     case DocForms:
         return element.hasTagName(formTag);
     case TableTBodies:
@@ skipping 311 matching lines @@
 }
 
 void HTMLCollection::trace(Visitor* visitor)
 {
     visitor->trace(m_namedItemCache);
     visitor->trace(m_collectionIndexCache);
     LiveNodeListBase::trace(visitor);
 }
 
 } // namespace blink