[Web Payments] Refactor sheet display to allow updating view content

chrome/browser/ui/views/payments/order_summary_view_controller.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 "chrome/browser/ui/views/payments/order_summary_view_controller.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 77 matching lines @@
     PaymentRequestState* state,
     PaymentRequestDialogView* dialog)
     : PaymentRequestSheetController(spec, state, dialog), pay_button_(nullptr) {
   state->AddObserver(this);
 }
 
 OrderSummaryViewController::~OrderSummaryViewController() {
   state()->RemoveObserver(this);
 }
 
-std::unique_ptr<views::View> OrderSummaryViewController::CreateView() {
-  std::unique_ptr<views::View> content_view = base::MakeUnique<views::View>();
+std::unique_ptr<views::Button>
+OrderSummaryViewController::CreatePrimaryButton() {
+  std::unique_ptr<views::Button> button(
+      views::MdTextButton::CreateSecondaryUiBlueButton(
+          this, l10n_util::GetStringUTF16(IDS_PAYMENTS_PAY_BUTTON)));
+  button->set_tag(static_cast<int>(PaymentRequestCommonTags::PAY_BUTTON_TAG));
+  button->set_id(static_cast<int>(DialogViewID::PAY_BUTTON));
+  pay_button_ = button.get();
+  UpdatePayButtonState(state()->is_ready_to_pay());
+  return button;
+}
 
+base::string16 OrderSummaryViewController::GetSheetTitle() {
+  return l10n_util::GetStringUTF16(IDS_PAYMENT_REQUEST_ORDER_SUMMARY_TITLE);
+}
+
+void OrderSummaryViewController::FillContentView(views::View* content_view) {
   views::BoxLayout* layout = new views::BoxLayout(
       views::BoxLayout::kVertical, 0, 0, 0);
   layout->set_main_axis_alignment(views::BoxLayout::MAIN_AXIS_ALIGNMENT_START);
   layout->set_cross_axis_alignment(
       views::BoxLayout::CROSS_AXIS_ALIGNMENT_STRETCH);
   content_view->SetLayoutManager(layout);
 
   // Set the ID for the first few line items labels, for testing.
   const std::vector<DialogViewID> line_items{
       DialogViewID::ORDER_SUMMARY_LINE_ITEM_1,
@@ skipping 15 matching lines @@
       IDS_PAYMENT_REQUEST_ORDER_SUMMARY_SHEET_TOTAL_FORMAT,
       base::UTF8ToUTF16(spec()->details().total->amount->currency),
       spec()->GetFormattedCurrencyAmount(
           spec()->details().total->amount->value));
 
   content_view->AddChildView(
       CreateLineItemView(base::UTF8ToUTF16(spec()->details().total->label),
                          total_label_value, true,
                          DialogViewID::ORDER_SUMMARY_TOTAL_AMOUNT_LABEL)
           .release());
-
-  return CreatePaymentView(
-      CreateSheetHeaderView(
-          true,
-          l10n_util::GetStringUTF16(IDS_PAYMENT_REQUEST_ORDER_SUMMARY_TITLE),
-          this),
-      std::move(content_view));
-}
-
-std::unique_ptr<views::Button>
-OrderSummaryViewController::CreatePrimaryButton() {
-  std::unique_ptr<views::Button> button(
-      views::MdTextButton::CreateSecondaryUiBlueButton(
-          this, l10n_util::GetStringUTF16(IDS_PAYMENTS_PAY_BUTTON)));
-  button->set_tag(static_cast<int>(PaymentRequestCommonTags::PAY_BUTTON_TAG));
-  button->set_id(static_cast<int>(DialogViewID::PAY_BUTTON));
-  pay_button_ = button.get();
-  UpdatePayButtonState(state()->is_ready_to_pay());
-  return button;
 }
 
 void OrderSummaryViewController::OnSelectedInformationChanged() {
   UpdatePayButtonState(state()->is_ready_to_pay());
 }
 
 void OrderSummaryViewController::UpdatePayButtonState(bool enabled) {
   pay_button_->SetEnabled(enabled);
 }
 
 }  // namespace payments