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

chrome/browser/ui/views/payments/shipping_option_view_controller.cc

 // 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.
 
 #include "chrome/browser/ui/views/payments/shipping_option_view_controller.h"
 
 #include "chrome/browser/ui/views/payments/payment_request_dialog_view.h"
 #include "chrome/browser/ui/views/payments/payment_request_views_util.h"
 #include "components/payments/content/payment_request_spec.h"
 #include "components/payments/content/payment_request_state.h"
+#include "ui/views/layout/fill_layout.h"
 
 namespace payments {
 
 namespace {
 
 class ShippingOptionItem : public PaymentRequestItemList::Item {
  public:
   ShippingOptionItem(payments::mojom::PaymentShippingOption* shipping_option,
                      PaymentRequestSpec* spec,
                      PaymentRequestState* state,
@@ skipping 45 matching lines @@
     : PaymentRequestSheetController(spec, state, dialog) {
   for (const auto& option : spec->details().shipping_options) {
     shipping_option_list_.AddItem(base::MakeUnique<ShippingOptionItem>(
         option.get(), spec, state, &shipping_option_list_, dialog,
         option.get() == state->selected_shipping_option()));
   }
 }
 
 ShippingOptionViewController::~ShippingOptionViewController() {}
 
-std::unique_ptr<views::View> ShippingOptionViewController::CreateView() {
-  std::unique_ptr<views::View> list_view =
-      shipping_option_list_.CreateListView();
-  return CreatePaymentView(
-      CreateSheetHeaderView(
-          true, GetShippingOptionSectionString(spec()->options().shipping_type),
-          this),
-      std::move(list_view));
+base::string16 ShippingOptionViewController::GetSheetTitle() {
+  return GetShippingOptionSectionString(spec()->options().shipping_type);
+}
+
+void ShippingOptionViewController::FillContentView(views::View* content_view) {
+  content_view->SetLayoutManager(new views::FillLayout);
+  content_view->AddChildView(shipping_option_list_.CreateListView().release());
 }
 
 std::unique_ptr<views::View>
 ShippingOptionViewController::CreateExtraFooterView() {
   return nullptr;
 }
 
 }  // namespace payments