PaymentApp: Add classes for supporting Web Based Payment Apps

chrome/android/java/src/org/chromium/chrome/browser/payments/ServiceWorkerPaymentInstrument.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 org.chromium.payments.mojom.PaymentItem;
+import org.chromium.payments.mojom.PaymentMethodData;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * This instrument class represents a single payment option for a service
+ * worker based payment app.
+ *
+ * @see org.chromium.chrome.browser.payments.ServiceWorkerPaymentApp
+ *
+ * @see https://w3c.github.io/webpayments-payment-apps-api/
+ */
+public class ServiceWorkerPaymentInstrument extends PaymentInstrument {
+    private final ServiceWorkerPaymentAppBridge.Option mOption;
+    private final Set<String> mMethodNames;
+
+    /**
+     * Build a service worker based payment instrument based on a single payment option
+     * of an installed payment app.
+     *
+     * @see https://w3c.github.io/webpayments-payment-apps-api/#payment-app-options
+     *
+     * @param scopeUrl    The scope url of the corresponding service worker payment app.
+     * @param option      A payment app option from the payment app.
+     */
+    public ServiceWorkerPaymentInstrument(String scopeUrl,
+            ServiceWorkerPaymentAppBridge.Option option) {
+        super(scopeUrl + "#" + option.id, option.label, null /* icon */, option.icon);
+        mOption = option;
+
+        mMethodNames = new HashSet<String>(option.enabledMethods);
+    }
+
+    @Override
+    public Set<String> getInstrumentMethodNames() {
+        return Collections.unmodifiableSet(mMethodNames);
+    }
+
+    @Override
+    public void invokePaymentApp(String merchantName, String origin, PaymentItem total,
+            List<PaymentItem> cart, Map<String, PaymentMethodData> methodData,
+            InstrumentDetailsCallback callback) {
+        // TODO(tommyt): crbug.com/669876. Implement this for use with Service Worker Payment Apps.
+        callback.onInstrumentDetailsError();
+    }
+
+    @Override
+    public void dismissInstrument() {}
+}