PaymentHandler: Merge PaymentAppRequest and PaymentRequestEvent.

content/test/data/payments/payment_app.js

 // Copyright 2017 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.
 
 self.addEventListener('paymentrequest', e => {
+  e.waitUntil(clients.matchAll({includeUncontrolled: true}).then(clients => {
+    clients.forEach(client => {
+      if (client.url.indexOf('payment_app_invocation.html') != -1) {
+        client.postMessage(e.topLevelOrigin);
+        client.postMessage(e.paymentRequestOrigin);
+        client.postMessage(e.paymentRequestId);
+        client.postMessage(JSON.stringify(e.methodData));
+        client.postMessage(JSON.stringify(e.total));
+        client.postMessage(JSON.stringify(e.modifiers));
+        client.postMessage(e.instrumentKey);
+      }
+    });
+  }));
+
   // SW -------------------- openWindow() ------------------> payment_app_window
   // SW <----- postMessage('payment_app_window_ready') ------ payment_app_window
   // SW -------- postMessage('payment_app_request') --------> payment_app_window
   // SW <-- postMessage({methodName: 'test', details: {}}) -- payment_app_window
   e.respondWith(new Promise(resolve => {
     let payment_app_window = undefined;
     let window_ready = false;
 
     let maybeSendPaymentRequest = function() {
       if (payment_app_window && window_ready)
@@ skipping 14 matching lines @@
     });
 
     // Open a window
     clients.openWindow('payment_app_window.html')
       .then(window_client => {
         payment_app_window = window_client;
         maybeSendPaymentRequest();
       })
   }));
 });