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

third_party/WebKit/Source/core/testing/DictionaryTest.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 "core/testing/DictionaryTest.h"
 
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8ObjectBuilder.h"
 #include "core/testing/InternalDictionary.h"
 #include "core/testing/InternalDictionaryDerived.h"
@@ skipping 155 matching lines @@
 }
 
 String DictionaryTest::stringFromIterable(
     ScriptState* scriptState,
     Dictionary iterable,
     ExceptionState& exceptionState) const {
   StringBuilder result;
   ExecutionContext* executionContext = scriptState->getExecutionContext();
   DictionaryIterator iterator = iterable.getIterator(executionContext);
   if (iterator.isNull())
-    return emptyString();
+    return emptyString;
 
   bool firstLoop = true;
   while (iterator.next(executionContext, exceptionState)) {
     if (exceptionState.hadException())
-      return emptyString();
+      return emptyString;
 
     if (firstLoop)
       firstLoop = false;
     else
       result.append(',');
 
     v8::Local<v8::Value> value;
     if (v8Call(iterator.value(), value))
       result.append(toCoreString(value->ToString()));
   }
@@ skipping 34 matching lines @@
 }
 
 DEFINE_TRACE(DictionaryTest) {
   visitor->trace(m_elementMember);
   visitor->trace(m_elementOrNullMember);
   visitor->trace(m_doubleOrStringSequenceMember);
   visitor->trace(m_eventTargetOrNullMember);
 }
 
 }  // namespace blink