Replace WTF::emptyString{16Bit}() with a static global

third_party/WebKit/Source/core/svg/SVGEnumeration.cpp

 /*
  * Copyright (C) 2014 Google 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 34 matching lines @@
   return svgEnumeration;
 }
 
 String SVGEnumerationBase::valueAsString() const {
   for (const auto& entry : m_entries) {
     if (m_value == entry.first)
       return entry.second;
   }
 
   ASSERT(m_value < maxInternalEnumValue());
-  return emptyString();
+  return emptyString;
 }
 
 void SVGEnumerationBase::setValue(unsigned short value) {
   m_value = value;
   notifyChange();
 }
 
 SVGParsingError SVGEnumerationBase::setValueAsString(const String& string) {
   for (const auto& entry : m_entries) {
     if (string == entry.second) {
@@ skipping 32 matching lines @@
   animationElement->animateDiscreteType<unsigned short>(
       percentage, fromEnumeration, toEnumeration, m_value);
 }
 
 float SVGEnumerationBase::calculateDistance(SVGPropertyBase*, SVGElement*) {
   // No paced animations for boolean.
   return -1;
 }
 
 }  // namespace blink