[Payments] Add metric for when Pr UI is skipped.

chrome/test/data/payments/metrics.js

 /*
  * 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.
  */
 
 /* global PaymentRequest:false */
 
 var request;
 
@@ skipping 64 matching lines @@
           print(JSON.stringify(resp, undefined, 2));
         }).catch(function(error) {
           print(error);
         });
   } catch (error) {
     print(error.message);
   }
 }
 
 /**
+ * Launches the PaymentRequest UI which accepts only Android Pay and does not
+ * require any other information.
+ */
+function androidPaySkipUiBuy() {  // eslint-disable-line no-unused-vars
+  try {
+    request = new PaymentRequest(
+        [{supportedMethods: ['https://android.com/pay']}], {
+          total: {label: 'Total', amount: {currency: 'USD', value: '5.00'}},
+        });
+    request.show()
+        .then(function(resp) {
+          return resp.complete('success');
+        }).then(function() {
+          print(JSON.stringify(resp, undefined, 2));
+        }).catch(function(error) {
+          print(error);
+        });
+  } catch (error) {
+    print(error.message);
+  }
+}
+
+/**
  * Launches the PaymentRequest UI which accepts only an unsupported payment
  * method.
  */
 function noSupported() {  // eslint-disable-line no-unused-vars
   try {
     request = new PaymentRequest(
         [{supportedMethods: ['https://randompay.com']}], {
           total: {label: 'Total', amount: {currency: 'USD', value: '5.00'}},
           shippingOptions: [{
             id: 'freeShippingOption',
@@ skipping 23 matching lines @@
   try {
     request.abort().then(function() {
       print('Aborted');
     }).catch(function() {
       print('Cannot abort');
     });
   } catch (error) {
     print(error.message);
   }
 }