Consistently use AtomicString for namespaceURI / prefix

Source/core/svg/animation/SVGSMILElement.cpp

 /*
  * Copyright (C) 2008 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:
  * 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 234 matching lines @@
     if (attributeName.isEmpty())
         return anyQName();
     if (!attributeName.contains(':'))
         return QualifiedName(nullAtom, attributeName, nullAtom);
 
     AtomicString prefix;
     AtomicString localName;
     if (!Document::parseQualifiedName(attributeName, prefix, localName, ASSERT_NO_EXCEPTION))
         return anyQName();
 
-    String namespaceURI = svgElement->lookupNamespaceURI(prefix);
+    const AtomicString& namespaceURI = svgElement->lookupNamespaceURI(prefix);
     if (namespaceURI.isEmpty())
         return anyQName();
 
     return QualifiedName(nullAtom, localName, namespaceURI);
 }
 
 static inline void clearTimesWithDynamicOrigins(Vector<SMILTimeWithOrigin>& timeList)
 {
     for (int i = timeList.size() - 1; i >= 0; --i) {
         if (timeList[i].originIsScript())
@@ skipping 1013 matching lines @@
     if (eventType == "repeatn") {
         unsigned repeatEventCount = m_repeatEventCountList.first();
         m_repeatEventCountList.remove(0);
         dispatchEvent(RepeatEvent::create(eventType, repeatEventCount));
     } else {
         dispatchEvent(Event::create(eventType));
     }
 }
 
 }