[Payments] Introduce basic interactive browsertests for Payment Request

chrome/browser/ui/views/payments/test_chrome_payment_request_delegate.h

+// 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.
+
+#ifndef CHROME_BROWSER_UI_VIEWS_PAYMENTS_TEST_CHROME_PAYMENT_REQUEST_DELEGATE_H_
+#define CHROME_BROWSER_UI_VIEWS_PAYMENTS_TEST_CHROME_PAYMENT_REQUEST_DELEGATE_H_
+
+#include "base/macros.h"
+#include "chrome/browser/payments/chrome_payment_request_delegate.h"
+#include "chrome/browser/ui/views/payments/payment_request_dialog.h"
+
+namespace content {
+class WebContents;
+}
+
+namespace payments {
+
+class PaymentRequest;
+
+// Implementation of the Payment Request delegate used in tests.
+class TestChromePaymentRequestDelegate : public ChromePaymentRequestDelegate {
+ public:
+  TestChromePaymentRequestDelegate(content::WebContents* web_contents,
+                                   PaymentRequestDialog::Observer* observer);
+
+  void ShowPaymentRequestDialog(PaymentRequest* request) override;
+
+ private:
+  PaymentRequestDialog::Observer* observer_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestChromePaymentRequestDelegate);
+};
+
+}  // namespace payments
+
+#endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_TEST_CHROME_PAYMENT_REQUEST_DELEGATE_H_