Move HTMLTagCollection to its own file

Source/core/html/HTMLTagCollection.cpp

Index: Source/core/html/HTMLTagCollection.cpp
diff --git a/Source/core/html/HTMLHeadElement.cpp b/Source/core/html/HTMLTagCollection.cpp
similarity index 65%
copy from Source/core/html/HTMLHeadElement.cpp
copy to Source/core/html/HTMLTagCollection.cpp
index 494154590ac8e117319dd36b661036edefbdd91f..27bfc4d0d633ce0552e548f9d38dc31332a45b09 100644
--- a/Source/core/html/HTMLHeadElement.cpp
+++ b/Source/core/html/HTMLTagCollection.cpp
@@ -1,9 +1,10 @@
 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
- *           (C) 2000 Simon Hausmann (hausmann@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
- * Copyright (C) 2004, 2006, 2010 Apple Inc. All rights reserved.
+ * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
+ * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
+ * 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
@@ -22,20 +23,15 @@
  */
 
 #include "config.h"
-#include "core/html/HTMLHeadElement.h"
-
-#include "core/HTMLNames.h"
+#include "HTMLTagCollection.h"
 
 namespace WebCore {
 
-using namespace HTMLNames;
-
-inline HTMLHeadElement::HTMLHeadElement(Document& document)
-    : HTMLElement(headTag, document)
+HTMLTagCollection::HTMLTagCollection(ContainerNode& rootNode, const AtomicString& localName)
+    : TagCollection(rootNode, HTMLTagCollectionType, starAtom, localName)
+    , m_loweredLocalName(localName.lower())
 {
-    ScriptWrappable::init(this);
+    ASSERT(rootNode.document().isHTMLDocument());
 }
 
-DEFINE_NODE_FACTORY(HTMLHeadElement)
-
-}
+} // namespace WebCore