Have HTMLFormElement's named getter return a RadioNodeList.

Source/core/html/RadioNodeList.h

 /*
  * Copyright (c) 2012 Motorola Mobility, Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 14 matching lines @@
 
 #ifndef RadioNodeList_h
 #define RadioNodeList_h
 
 #include "core/dom/LiveNodeList.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/text/AtomicString.h"
 
 namespace WebCore {
 
-class RadioNodeList FINAL : public LiveNodeList {
+class RadioNodeList : public LiveNodeList {
 public:
     static PassRefPtr<RadioNodeList> create(Node* ownerNode, CollectionType type, const AtomicString& name)
     {
         ASSERT_UNUSED(type, type == RadioNodeListType);
         return adoptRef(new RadioNodeList(ownerNode, name));
     }
 
     virtual ~RadioNodeList();
 
-    String value() const;
-    void setValue(const String&);
+    virtual String value() const;
+    virtual void setValue(const String&);
+
+protected:
+    RadioNodeList(Node*, const AtomicString& name);
 
 private:
-    RadioNodeList(Node*, const AtomicString& name);
     bool checkElementMatchesRadioNodeListFilter(Element*) const;
 
     virtual bool nodeMatches(Element*) const OVERRIDE;
 
     AtomicString m_name;
 };
 
-} // namepsace
+// A specialized version of RadioNodeList, limited to <img> elements.
+class RadioImgNodeList FINAL : public RadioNodeList {
+public:

[esprehn, 2013/12/19 11:02:48]

I'd rather you just added a bool to the RadioNodeList that switches it between
<img> only mode and regular mode. Then you can change the ASSERT() in the create
to (type == RadioNodeListType || type == RadioImgNodeListtype).

[sof, 2013/12/19 12:15:05]

Done.

+    static PassRefPtr<RadioImgNodeList> create(Node* ownerNode, CollectionType type, const AtomicString& name)
+    {
+        ASSERT_UNUSED(type, type == RadioNodeListType);
+        return adoptRef(new RadioImgNodeList(ownerNode, name));
+    }
+
+    virtual String value() const OVERRIDE { return String(); }
+    virtual void setValue(const String&) OVERRIDE { }
+
+private:
+    RadioImgNodeList(Node*, const AtomicString& name);
+
+    virtual bool nodeMatches(Element*) const OVERRIDE;
+
+    AtomicString m_name;
+};
+
+} // namespace
 
 #endif