[Web Payments] Initial plumb of Payment Request dialog

chrome/browser/payments/ui/payment_request_dialog.cc

+// 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.
+
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/browser/payments/ui/payment_request_dialog.h"
+
+PaymentRequestDialog::PaymentRequestDialog()
+  : label_(new views::Label(base::ASCIIToUTF16("Payments dialog"))) {
+  SetLayoutManager(new views::FillLayout());
+  AddChildView(label_.get());
+}
+
+PaymentRequestDialog::~PaymentRequestDialog() {}
+
+ui::ModalType PaymentRequestDialog::GetModalType() const {
+  return ui::MODAL_TYPE_CHILD;
+}
+
+gfx::Size PaymentRequestDialog::GetPreferredSize() const {
+  gfx::Size ps = label_->GetPreferredSize();
+  ps.set_width(ps.width() + 200);
+  ps.set_height(ps.height() + 200);
+  return ps;
+}