[Payments] Introduce basic interactive browsertests for Payment Request

chrome/browser/ui/views/payments/payment_request_interactive_uitest.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 <vector>
+
+#include "chrome/browser/ui/views/payments/payment_request_interactive_uitest_base.h"
+#include "components/payments/payment_request.h"
+#include "components/payments/payment_request_web_contents_manager.h"
+
+namespace payments {
+
+class PaymentRequestWebContentsManagerTest
+    : public PaymentRequestInteractiveTestBase {
+ protected:
+  PaymentRequestWebContentsManagerTest()
+      : PaymentRequestInteractiveTestBase(
+            "/payment_request_multiple_requests.html") {}
+};
+
+// If the page creates multiple PaymentRequest objects, it should not crash.
+IN_PROC_BROWSER_TEST_F(PaymentRequestWebContentsManagerTest, MultipleRequests) {
+  const std::vector<PaymentRequest*> payment_requests =
+      GetPaymentRequests(GetActiveWebContents());
+  EXPECT_EQ(5U, payment_requests.size());
+}
+
+class PaymentRequestNoShippingTest : public PaymentRequestInteractiveTestBase {
+ protected:
+  PaymentRequestNoShippingTest()
+      : PaymentRequestInteractiveTestBase(
+            "/payment_request_no_shipping_test.html") {}
+};
+
+IN_PROC_BROWSER_TEST_F(PaymentRequestNoShippingTest, OpenPaymentRequestSheet) {
+  InvokePaymentRequestUI();
+}
+
+}  // namespace payments