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

third_party/WebKit/Source/core/css/CSSFontFaceSrcValue.h

 /*
  * Copyright (C) 2007, 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 31 matching lines @@
   static CSSFontFaceSrcValue* create(
       const String& specifiedResource,
       const String& absoluteResource,
       ContentSecurityPolicyDisposition shouldCheckContentSecurityPolicy) {
     return new CSSFontFaceSrcValue(specifiedResource, absoluteResource, false,
                                    shouldCheckContentSecurityPolicy);
   }
   static CSSFontFaceSrcValue* createLocal(
       const String& absoluteResource,
       ContentSecurityPolicyDisposition shouldCheckContentSecurityPolicy) {
-    return new CSSFontFaceSrcValue(emptyString(), absoluteResource, true,
+    return new CSSFontFaceSrcValue(emptyString, absoluteResource, true,
                                    shouldCheckContentSecurityPolicy);
   }
 
   const String& resource() const { return m_absoluteResource; }
   const String& format() const { return m_format; }
   bool isLocal() const { return m_isLocal; }
 
   void setFormat(const String& format) { m_format = format; }
   void setReferrer(const Referrer& referrer) { m_referrer = referrer; }
 
@@ skipping 55 matching lines @@
     }
   };
   mutable Member<FontResourceHelper> m_fetched;
 };
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSFontFaceSrcValue, isFontFaceSrcValue());
 
 }  // namespace blink
 
 #endif