Drop document.createEvent support for things still behind a flag

third_party/WebKit/Source/modules/serviceworkers/InstallEvent.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/serviceworkers/InstallEvent.h"
 
 #include "core/dom/ExceptionCode.h"
 #include "modules/serviceworkers/ServiceWorkerGlobalScopeClient.h"
 #include "public/platform/WebSecurityOrigin.h"
 
 namespace blink {
 
-InstallEvent* InstallEvent::create()
-{
-    return new InstallEvent();
-}
-
 InstallEvent* InstallEvent::create(const AtomicString& type, const ExtendableEventInit& eventInit)
 {
     return new InstallEvent(type, eventInit);
 }
 
 InstallEvent* InstallEvent::create(const AtomicString& type, const ExtendableEventInit& eventInit, WaitUntilObserver* observer)
 {
     return new InstallEvent(type, eventInit, observer);
 }
 
@@ skipping 60 matching lines @@
         }
     }
     client->registerForeignFetchScopes(subScopeURLs, parsedOrigins);
 }
 
 const AtomicString& InstallEvent::interfaceName() const
 {
     return EventNames::InstallEvent;
 }
 
-InstallEvent::InstallEvent()
-{
-}
-
 InstallEvent::InstallEvent(const AtomicString& type, const ExtendableEventInit& initializer)
     : ExtendableEvent(type, initializer)
 {
 }
 
 InstallEvent::InstallEvent(const AtomicString& type, const ExtendableEventInit& initializer, WaitUntilObserver* observer)
     : ExtendableEvent(type, initializer, observer)
 {
 }
 
 } // namespace blink