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

third_party/WebKit/Source/core/events/ApplicationCacheErrorEvent.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/events/ApplicationCacheErrorEvent.h"
 
 namespace blink {
 
 static const String& errorReasonToString(
     WebApplicationCacheHost::ErrorReason reason) {
@@ skipping 18 matching lines @@
     case WebApplicationCacheHost::AbortError:
       return errorAbort;
     case WebApplicationCacheHost::QuotaError:
       return errorQuota;
     case WebApplicationCacheHost::PolicyError:
       return errorPolicy;
     case WebApplicationCacheHost::UnknownError:
       return errorUnknown;
   }
   NOTREACHED();
-  return emptyString();
+  return emptyString;
 }
 
 ApplicationCacheErrorEvent::ApplicationCacheErrorEvent(
     WebApplicationCacheHost::ErrorReason reason,
     const String& url,
     int status,
     const String& message)
     : Event(EventTypeNames::error, false, false),
       m_reason(errorReasonToString(reason)),
       m_url(url),
@@ skipping 14 matching lines @@
     m_message = initializer.message();
 }
 
 ApplicationCacheErrorEvent::~ApplicationCacheErrorEvent() {}
 
 DEFINE_TRACE(ApplicationCacheErrorEvent) {
   Event::trace(visitor);
 }
 
 }  // namespace blink