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

third_party/WebKit/Source/bindings/core/v8/V8Initializer.cpp

 /*
  * 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 98 matching lines @@
                                        v8::Local<v8::Value> data) {
   if (V8DOMWrapper::isWrapper(isolate, data)) {
     v8::Local<v8::Object> obj = v8::Local<v8::Object>::Cast(data);
     const WrapperTypeInfo* type = toWrapperTypeInfo(obj);
     if (V8DOMException::wrapperTypeInfo.isSubclass(type)) {
       DOMException* exception = V8DOMException::toImpl(obj);
       if (exception && !exception->messageForConsole().isEmpty())
         return exception->toStringForConsole();
     }
   }
-  return emptyString();
+  return emptyString;
 }
 
 namespace {
 MessageLevel MessageLevelFromNonFatalErrorLevel(int errorLevel) {
   MessageLevel level = ErrorMessageLevel;
   switch (errorLevel) {
     case v8::Isolate::kMessageDebug:
       level = VerboseMessageLevel;
       break;
     case v8::Isolate::kMessageLog:
@@ skipping 390 matching lines @@
           v8::Isolate::kMessageLog);
   isolate->SetFatalErrorHandler(reportFatalErrorInWorker);
 
   uint32_t here;
   isolate->SetStackLimit(reinterpret_cast<uintptr_t>(&here) -
                          kWorkerMaxStackSize);
   isolate->SetPromiseRejectCallback(promiseRejectHandlerInWorker);
 }
 
 }  // namespace blink