PaymentApp: Add classes for supporting Web Based Payment Apps

chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentRequestImpl.java

 // 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.
 
 package org.chromium.chrome.browser.payments;
 
 import android.app.Activity;
 import android.graphics.Bitmap;
 import android.os.Handler;
 import android.support.v4.util.ArrayMap;
@@ skipping 1061 matching lines @@
     @Override
     public void onInstrumentsReady(PaymentApp app, List<PaymentInstrument> instruments) {
         if (mClient == null) return;
         mPendingApps.remove(app);
 
         // Place the instruments into either "autofill" or "non-autofill" list to be displayed when
         // all apps have responded.
         if (instruments != null) {
             for (int i = 0; i < instruments.size(); i++) {
                 PaymentInstrument instrument = instruments.get(i);
-                Set<String> instrumentMethodNames = instrument.getInstrumentMethodNames();
+                Set<String> instrumentMethodNames =
+                        new HashSet<>(instrument.getInstrumentMethodNames());
                 instrumentMethodNames.retainAll(mMethodData.keySet());
                 if (!instrumentMethodNames.isEmpty()) {
                     addPendingInstrument(instrument);
                 } else {
                     instrument.dismissInstrument();
                 }
             }
         }
 
         // Some payment apps still have not responded. Continue waiting for them.
@@ skipping 244 matching lines @@
                 "PaymentRequest.CheckoutFunnel.Aborted", abortReason,
                 PaymentRequestMetrics.ABORT_REASON_MAX);
 
         if (abortReason == PaymentRequestMetrics.ABORT_REASON_ABORTED_BY_USER) {
             mJourneyLogger.recordJourneyStatsHistograms("UserAborted");
         } else {
             mJourneyLogger.recordJourneyStatsHistograms("OtherAborted");
         }
     }
 }