Remove Blink-WebKit-only document.createEvent strings

third_party/WebKit/Source/modules/background_sync/SyncEvent.cpp

 // Copyright 2015 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/background_sync/SyncEvent.h"
 
 namespace blink {
 
-SyncEvent::SyncEvent()
-{
-}
-
 SyncEvent::SyncEvent(const AtomicString& type, const String& tag, bool lastChance, WaitUntilObserver* observer)
     : ExtendableEvent(type, ExtendableEventInit(), observer)
     , m_tag(tag)
     , m_lastChance(lastChance)
 {
 }
 
 SyncEvent::SyncEvent(const AtomicString& type, const SyncEventInit& init)
     : ExtendableEvent(type, init)
 {
@@ skipping 19 matching lines @@
 {
     return m_lastChance;
 }
 
 DEFINE_TRACE(SyncEvent)
 {
     ExtendableEvent::trace(visitor);
 }
 
 } // namespace blink