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

chrome/browser/ui/views/payments/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_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_DIALOG_H_
+#define CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_DIALOG_H_
+
+#include "ui/views/controls/label.h"
+#include "ui/views/window/dialog_delegate.h"
+
+namespace payments {
+
+class PaymentRequestImpl;
+
+// The dialog delegate that represents a desktop WebPayments dialog. This class
+// is responsible for displaying the view associated with the current state of
+// the WebPayments flow and managing the transition between those states.
+class PaymentRequestDialog : public views::DialogDelegateView {
+ public:
+  explicit PaymentRequestDialog(PaymentRequestImpl* impl);
+  ~PaymentRequestDialog() override;
+
+  // views::WidgetDelegate:
+  ui::ModalType GetModalType() const override;
+
+  // views::View:
+  gfx::Size GetPreferredSize() const override;
+
+  // views::DialogDelegate:
+  bool Cancel() override;
+
+ private:
+  // Non-owned reference to the PaymentRequestImpl that initiated this dialog.
+  // Since the PaymentRequestImpl object always outlives this one, the pointer
+  // should always be valid even though there is no direct ownership
+  // relationship between the two.
+  PaymentRequestImpl* impl_;
+  std::unique_ptr<views::Label> label_;
+
+  DISALLOW_COPY_AND_ASSIGN(PaymentRequestDialog);
+};
+
+}  // namespace payments
+
+#endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_DIALOG_H_