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

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

Index: chrome/browser/ui/views/payments/credit_card_editor_view_controller.cc
diff --git a/chrome/browser/ui/views/payments/credit_card_editor_view_controller.cc b/chrome/browser/ui/views/payments/credit_card_editor_view_controller.cc
index 525b426ed240f0d9cc43b2917d4f0eb25edde8a4..b44d6b2c08c5c3950472be92de4e354b1fffd7f8 100644
--- a/chrome/browser/ui/views/payments/credit_card_editor_view_controller.cc
+++ b/chrome/browser/ui/views/payments/credit_card_editor_view_controller.cc
@@ -142,10 +142,6 @@ CreditCardEditorViewController::CreateHeaderView() {
   return view;
 }
 
-int CreditCardEditorViewController::GetViewHeaderTitleId() const {
-  return IDS_PAYMENT_REQUEST_CREDIT_CARD_EDITOR_ADD_TITLE;
-}
-
 std::vector<EditorField> CreditCardEditorViewController::GetFieldDefinitions() {
   return std::vector<EditorField>{
       {autofill::CREDIT_CARD_NUMBER,
@@ -232,6 +228,11 @@ CreditCardEditorViewController::GetComboboxModelForType(
   return std::unique_ptr<ui::ComboboxModel>();
 }
 
+base::string16 CreditCardEditorViewController::GetSheetTitle() {
+  return l10n_util::GetStringUTF16(
+      IDS_PAYMENT_REQUEST_CREDIT_CARD_EDITOR_ADD_TITLE);
+}
+
 CreditCardEditorViewController::CreditCardValidationDelegate::
     CreditCardValidationDelegate(
         const EditorField& field,