[Payments] Add PaymentRequest checkout funnel UKMs.

chrome/browser/payments/android/chrome_payments_jni_registrar.cc

+// 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.
+
+#include "chrome/browser/payments/android/chrome_payments_jni_registrar.h"
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_registrar.h"
+#include "base/macros.h"
+#include "chrome/browser/payments/android/journey_logger_android.h"
+
+namespace payments {
+namespace android {
+
+static base::android::RegistrationMethod kChromePaymentsRegisteredMethods[] = {
+    {"JourneyLogger", JourneyLoggerAndroid::Register},
+};
+
+bool RegisterChromePayments(JNIEnv* env) {
+  return base::android::RegisterNativeMethods(
+      env, kChromePaymentsRegisteredMethods,
+      arraysize(kChromePaymentsRegisteredMethods));
+}
+
+}  // namespace android
+}  // namespace payments