[Payments] Implement openWindow for service worker based payment handler

third_party/WebKit/Source/modules/payments/PaymentRequestEvent.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/PaymentRequestEvent.h"
 
 #include "modules/serviceworkers/RespondWithObserver.h"
+#include "modules/serviceworkers/ServiceWorkerClients.h"
+#include "modules/serviceworkers/ServiceWorkerGlobalScope.h"
 #include "platform/wtf/text/AtomicString.h"
 
 namespace blink {
 
 PaymentRequestEvent* PaymentRequestEvent::Create(
     const AtomicString& type,
     const PaymentAppRequest& app_request,
     RespondWithObserver* respond_with_observer,
     WaitUntilObserver* wait_until_observer) {
   return new PaymentRequestEvent(type, app_request, respond_with_observer,
@@ skipping 28 matching lines @@
 
 const HeapVector<PaymentDetailsModifier>& PaymentRequestEvent::modifiers()
     const {
   return modifiers_;
 }
 
 const String& PaymentRequestEvent::instrumentKey() const {
   return instrument_key_;
 }
 
+ScriptPromise PaymentRequestEvent::openWindow(ScriptState* script_state,
+                                              const String& url) {
+  return ToServiceWorkerGlobalScope(ExecutionContext::From(script_state))

[zino, 2017/05/25 17:02:42]

If the origin of the url is not the same as the SW's origin, then we probably
should reject with SecurityError.
Please see 8-4 section:
https://w3c.github.io/payment-handler/#dfn-open-window-algorithm

Also, we will have to add a test for it.

[gogerald1, 2017/05/29 22:13:16]

Done.

+      ->clients()
+      ->openWindow(script_state, top_level_origin_, url);
+}
+
 void PaymentRequestEvent::respondWith(ScriptState* script_state,
                                       ScriptPromise script_promise,
                                       ExceptionState& exception_state) {
   stopImmediatePropagation();
   if (observer_) {
     observer_->RespondWith(script_state, script_promise, exception_state);
   }
 }
 
 DEFINE_TRACE(PaymentRequestEvent) {
@@ skipping 12 matching lines @@
       top_level_origin_(app_request.topLevelOrigin()),
       payment_request_origin_(app_request.paymentRequestOrigin()),
       payment_request_id_(app_request.paymentRequestId()),
       method_data_(std::move(app_request.methodData())),
       total_(app_request.total()),
       modifiers_(app_request.modifiers()),
       instrument_key_(app_request.instrumentKey()),
       observer_(respond_with_observer) {}
 
 }  // namespace blink