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

Source/core/html/HTMLCollection.cpp

Index: Source/core/html/HTMLCollection.cpp
diff --git a/Source/core/html/HTMLCollection.cpp b/Source/core/html/HTMLCollection.cpp
index 85be33adee94189b9952e65dfb4460c1a65eada2..6402d501849435ac64123ad87c3b3f89c9e09bd0 100644
--- a/Source/core/html/HTMLCollection.cpp
+++ b/Source/core/html/HTMLCollection.cpp
@@ -191,6 +191,16 @@ void HTMLCollection::invalidateCache(Document* oldDocument) const
     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()) {