Java implementation of PaymentRequest mojo service

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

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentAppFactory.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentAppFactory.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentAppFactory.java
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+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/PaymentAppFactory.java
@@ -0,0 +1,52 @@
+// 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.content_public.browser.WebContents;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Builds instances of payment apps.
+ */
+public class PaymentAppFactory {
+    /**
+     * Can be used to build additional types of payment apps without Chrome knowing about their
+     * types.
+     */
+    private static PaymentAppFactoryAddition sAdditionalFactory;
+
+    /**
+     * The interface for additional payment app factories.
+     */
+    public interface PaymentAppFactoryAddition {
+        /**
+         * Builds instances of payment apps.
+         */
+        List<PaymentApp> create(WebContents webContents);
+    }
+
+    /**
+     * Sets the additional factory that can build instances of payment apps.
+     *
+     * @param additionalFactory Can build instances of payment apps.
+     */
+    public static void setAdditionalFactory(PaymentAppFactoryAddition additionalFactory) {
+        sAdditionalFactory = additionalFactory;
+    }
+
+    /**
+     * Builds instances of payment apps.
+     *
+     * @param webContents The web contents where PaymentRequest was invoked.
+     */
+    public static List<PaymentApp> create(WebContents webContents) {
+        List<PaymentApp> result = new ArrayList<>(2);
+        result.add(new AutofillPaymentApp(webContents));
+        if (sAdditionalFactory != null) result.addAll(sAdditionalFactory.create(webContents));
+        return result;
+    }
+}