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

third_party/WebKit/Source/bindings/core/v8/V8StringResource.h

 /*
  * Copyright (C) 2009 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:
  * 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 262 matching lines @@
   return String();
 }
 
 template <>
 inline bool V8StringResource<TreatNullAsEmptyString>::isValid() const {
   return !m_v8Object->IsNull();
 }
 
 template <>
 inline String V8StringResource<TreatNullAsEmptyString>::fallbackString() const {
-  return emptyString();
+  return emptyString;
 }
 
 template <>
 inline bool V8StringResource<TreatNullAsNullString>::isValid() const {
   return !m_v8Object->IsNull();
 }
 
 template <>
 inline String V8StringResource<TreatNullAsNullString>::fallbackString() const {
   return String();
 }
 
 template <>
 inline bool V8StringResource<TreatNullAndUndefinedAsNullString>::isValid()
     const {
   return !m_v8Object->IsNull() && !m_v8Object->IsUndefined();
 }
 
 template <>
 inline String
 V8StringResource<TreatNullAndUndefinedAsNullString>::fallbackString() const {
   return String();
 }
 
 }  // namespace blink
 
 #endif  // V8StringResource_h