[ServiceWorker] Fix ExtendableMessageEvent idl binding

third_party/WebKit/Source/modules/serviceworkers/ExtendableMessageEvent.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/serviceworkers/ExtendableMessageEvent.h"
 
 namespace blink {
 
 ExtendableMessageEvent* ExtendableMessageEvent::Create(
     const AtomicString& type,
@@ skipping 33 matching lines @@
     const String& origin,
     MessagePortArray* ports,
     ServiceWorker* source,
     WaitUntilObserver* observer) {
   ExtendableMessageEvent* event =
       new ExtendableMessageEvent(std::move(data), origin, ports, observer);
   event->source_as_service_worker_ = source;
   return event;
 }
 
-MessagePortArray ExtendableMessageEvent::ports(bool& is_null) const {
+MessagePortArray ExtendableMessageEvent::ports() const {
   // TODO(bashi): Currently we return a copied array because the binding
   // layer could modify the content of the array while executing JS callbacks.
   // Avoid copying once we can make sure that the binding layer won't
   // modify the content.
   if (ports_) {
-    is_null = false;
     return *ports_;
   }
-  is_null = true;
   return MessagePortArray();
 }
 
-MessagePortArray ExtendableMessageEvent::ports() const {
-  bool unused;
-  return ports(unused);
-}
-
 void ExtendableMessageEvent::source(
     ClientOrServiceWorkerOrMessagePort& result) const {
   if (source_as_client_)
     result = ClientOrServiceWorkerOrMessagePort::fromClient(source_as_client_);
   else if (source_as_service_worker_)
     result = ClientOrServiceWorkerOrMessagePort::fromServiceWorker(
         source_as_service_worker_);
   else if (source_as_message_port_)
     result = ClientOrServiceWorkerOrMessagePort::fromMessagePort(
         source_as_message_port_);
@@ skipping 49 matching lines @@
                       observer),
       serialized_data_(std::move(data)),
       origin_(origin),
       last_event_id_(String()),
       ports_(ports) {
   if (serialized_data_)
     serialized_data_->RegisterMemoryAllocatedWithCurrentScriptContext();
 }
 
 }  // namespace blink