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

Source/core/dom/LiveNodeList.h

Index: Source/core/dom/LiveNodeList.h
diff --git a/Source/core/dom/LiveNodeList.h b/Source/core/dom/LiveNodeList.h
index 7efc4e65606dba84ccea7409be55c3c89970a4b4..71c41c41c9eca862b357e13d45eba72e63c42870 100644
--- a/Source/core/dom/LiveNodeList.h
+++ b/Source/core/dom/LiveNodeList.h
@@ -41,8 +41,8 @@ public:
     LiveNodeList(ContainerNode& ownerNode, CollectionType collectionType, NodeListInvalidationType invalidationType, NodeListRootType rootType = NodeListIsRootedAtNode)
         : LiveNodeListBase(ownerNode, rootType, invalidationType, collectionType) { }
 
-    virtual unsigned length() const OVERRIDE FINAL { return m_collectionIndexCache.nodeCount(*this); }
-    virtual Element* item(unsigned offset) const OVERRIDE FINAL { return m_collectionIndexCache.nodeAt(*this, offset); }
+    virtual unsigned length() const OVERRIDE FINAL;
+    virtual Element* item(unsigned offset) const OVERRIDE FINAL;
     virtual bool elementMatches(const Element&) const = 0;
 
     virtual void invalidateCache(Document* oldDocument = 0) const OVERRIDE FINAL;