[WebPayments] Move views-specific code to c/b/ui/views/

chrome/browser/payments/ui/payment_request_dialog.h

-// 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.
-
-#ifndef CHROME_BROWSER_PAYMENTS_UI_PAYMENT_REQUEST_DIALOG_H_
-#define CHROME_BROWSER_PAYMENTS_UI_PAYMENT_REQUEST_DIALOG_H_
-
-#include "components/payments/payment_request.mojom.h"
-#include "ui/views/controls/label.h"
-#include "ui/views/window/dialog_delegate.h"
-
-namespace payments {
-
-class PaymentRequestDialog : public views::DialogDelegateView {
- public:
-  explicit PaymentRequestDialog(
-      payments::mojom::PaymentRequestClientPtr client);
-  ~PaymentRequestDialog() override;
-
-  // views::WidgetDelegate
-  ui::ModalType GetModalType() const override;
-
-  // views::View
-  gfx::Size GetPreferredSize() const override;
-
-  // views::DialogDelegate
-  bool Cancel() override;
-
- private:
-  payments::mojom::PaymentRequestClientPtr client_;
-  std::unique_ptr<views::Label> label_;
-
-  DISALLOW_COPY_AND_ASSIGN(PaymentRequestDialog);
-};
-
-}  // namespace payments
-
-#endif  // CHROME_BROWSER_PAYMENTS_UI_PAYMENT_REQUEST_DIALOG_H_