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

third_party/WebKit/Source/modules/webshare/NavigatorShare.cpp

 // Copyright 2016 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/webshare/NavigatorShare.h"
 
 #include "core/dom/DOMException.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 93 matching lines @@
     m_service.set_connection_error_handler(convertToBaseCallback(WTF::bind(
         &NavigatorShare::onConnectionError, wrapWeakPersistent(this))));
     DCHECK(m_service);
   }
 
   ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
   ShareClientImpl* client = new ShareClientImpl(this, resolver);
   m_clients.insert(client);
   ScriptPromise promise = resolver->promise();
 
-  m_service->Share(shareData.hasTitle() ? shareData.title() : emptyString(),
-                   shareData.hasText() ? shareData.text() : emptyString(),
+  m_service->Share(shareData.hasTitle() ? shareData.title() : emptyString,
+                   shareData.hasText() ? shareData.text() : emptyString,
                    doc->completeURL(shareData.url()),
                    convertToBaseCallback(WTF::bind(&ShareClientImpl::callback,
                                                    wrapPersistent(client))));
 
   return promise;
 }
 
 ScriptPromise NavigatorShare::share(ScriptState* scriptState,
                                     Navigator& navigator,
                                     const ShareData& shareData) {
   return from(navigator).share(scriptState, shareData);
 }
 
 void NavigatorShare::onConnectionError() {
   for (auto& client : m_clients) {
     client->onConnectionError();
   }
   m_clients.clear();
   m_service.reset();
 }
 
 }  // namespace blink