[Web Payments] Should set stop propagation flag.

third_party/WebKit/Source/modules/payments/PaymentRequestUpdateEvent.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/payments/PaymentRequestUpdateEvent.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptFunction.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
@@ skipping 98 matching lines @@
         "Cannot update details when the event is not being dispatched");
     return;
   }
 
   if (m_waitForUpdate) {
     exceptionState.throwDOMException(InvalidStateError,
                                      "Cannot update details twice");
     return;
   }
 
+  stopPropagation();
   stopImmediatePropagation();
   m_waitForUpdate = true;
   m_abortTimer.stop();
 
   promise.then(
       UpdatePaymentDetailsFunction::createFunction(scriptState, m_updater),
       UpdatePaymentDetailsErrorFunction::createFunction(scriptState,
                                                         m_updater));
 }
 
@@ skipping 15 matching lines @@
 }
 
 PaymentRequestUpdateEvent::PaymentRequestUpdateEvent(
     const AtomicString& type,
     const PaymentRequestUpdateEventInit& init)
     : Event(type, init),
       m_waitForUpdate(false),
       m_abortTimer(this, &PaymentRequestUpdateEvent::onUpdateEventTimeout) {}
 
 }  // namespace blink