Remove case-insensitive matching of usemap attribute.

third_party/WebKit/Source/core/dom/DocumentOrderedMap.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 57 matching lines @@
 inline bool keyMatchesMapName(const AtomicString& key, const Element& element) {
   return isHTMLMapElement(element) &&
          toHTMLMapElement(element).getName() == key;
 }
 
 inline bool keyMatchesSlotName(const AtomicString& key,
                                const Element& element) {
   return isHTMLSlotElement(element) && toHTMLSlotElement(element).name() == key;
 }
 
-inline bool keyMatchesLowercasedMapName(const AtomicString& key,
-                                        const Element& element) {
-  return isHTMLMapElement(element) &&
-         toHTMLMapElement(element).getName().lower() == key;
-}
-
 void DocumentOrderedMap::add(const AtomicString& key, Element* element) {
   DCHECK(key);
   DCHECK(element);
 
   Map::AddResult addResult = m_map.add(key, new MapEntry(element));
   if (addResult.isNewEntry)
     return;
 
   Member<MapEntry>& entry = addResult.storedValue->value;
   DCHECK(entry->count);
@@ skipping 107 matching lines @@
 HTMLSlotElement* DocumentOrderedMap::getSlotByName(
     const AtomicString& key,
     const TreeScope* scope) const {
   if (Element* slot = get<keyMatchesSlotName>(key, scope)) {
     DCHECK(isHTMLSlotElement(slot));
     return toHTMLSlotElement(slot);
   }
   return nullptr;
 }
 
-Element* DocumentOrderedMap::getElementByLowercasedMapName(
-    const AtomicString& key,
-    const TreeScope* scope) const {
-  return get<keyMatchesLowercasedMapName>(key, scope);
-}
-
 DEFINE_TRACE(DocumentOrderedMap) {
   visitor->trace(m_map);
 }
 
 DEFINE_TRACE(DocumentOrderedMap::MapEntry) {
   visitor->trace(element);
   visitor->trace(orderedList);
 }
 
 }  // namespace blink