Add missing id/name check over img-based RadioNodeLists.

Source/core/html/RadioNodeList.cpp

 /*
  * 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 72 matching lines @@
     unsigned length = this->length();
     for (unsigned i = 0; i < length; ++i) {
         HTMLInputElement* inputElement = toRadioButtonInputElement(*item(i));
         if (!inputElement || inputElement->value() != value)
             continue;
         inputElement->setChecked(true);
         return;
     }
 }
 
+bool RadioNodeList::matchesByIdOrName(const Element& testElement) const
+{
+    return testElement.getIdAttribute() == m_name || testElement.getNameAttribute() == m_name;
+}
+
 bool RadioNodeList::checkElementMatchesRadioNodeListFilter(const Element& testElement) const
 {
     ASSERT(!m_onlyMatchImgElements);
     ASSERT(isHTMLObjectElement(testElement) || testElement.isFormControlElement());
     if (isHTMLFormElement(ownerNode())) {
         HTMLFormElement* formElement = toHTMLElement(testElement).formOwner();
         if (!formElement || formElement != ownerNode())
             return false;
     }
 
-    return testElement.getIdAttribute() == m_name || testElement.getNameAttribute() == m_name;
+    return matchesByIdOrName(testElement);
 }
 
 bool RadioNodeList::elementMatches(const Element& element) const
 {
     if (m_onlyMatchImgElements) {
         if (!isHTMLImageElement(element))
             return false;
-        return toHTMLElement(element).formOwner() == ownerNode();
+
+        if (toHTMLElement(element).formOwner() != ownerNode())
+            return false;
+
+        return matchesByIdOrName(element);
     }
 
     if (!isHTMLObjectElement(element) && !element.isFormControlElement())
         return false;
 
     if (isHTMLInputElement(element) && toHTMLInputElement(element).isImageButton())
         return false;
 
     return checkElementMatchesRadioNodeListFilter(element);
 }
 
 } // namespace