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

third_party/WebKit/Source/modules/fetch/Response.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/fetch/Response.h"
 
 #include "bindings/core/v8/Dictionary.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8ArrayBuffer.h"
@@ skipping 320 matching lines @@
   ASSERT_NOT_REACHED();
   return "";
 }
 
 String Response::url() const {
   // "The url attribute's getter must return the empty string if response's
   // url is null and response's url, serialized with the exclude fragment
   // flag set, otherwise."
   const KURL* responseURL = m_response->url();
   if (!responseURL)
-    return emptyString();
+    return emptyString;
   if (!responseURL->hasFragmentIdentifier())
     return *responseURL;
   KURL url(*responseURL);
   url.removeFragmentIdentifier();
   return url;
 }
 
 bool Response::redirected() const {
   return m_response->urlList().size() > 1;
 }
@@ skipping 105 matching lines @@
       V8HiddenValue::internalBodyBuffer(scriptState->isolate()), bodyBuffer);
 }
 
 DEFINE_TRACE(Response) {
   Body::trace(visitor);
   visitor->trace(m_response);
   visitor->trace(m_headers);
 }
 
 }  // namespace blink