[WebPayments] Making all fields and buttons focusable

chrome/browser/ui/views/payments/credit_card_editor_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/credit_card_editor_view_controller.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 311 matching lines @@
 
   std::unique_ptr<views::View> button_view = base::MakeUnique<views::View>();
   button_view->SetLayoutManager(new views::FillLayout);
 
   // The button to add new billing addresses.
   std::unique_ptr<views::Button> add_button(
       views::MdTextButton::Create(this, l10n_util::GetStringUTF16(IDS_ADD)));
   add_button->set_id(
       static_cast<int>(DialogViewID::ADD_BILLING_ADDRESS_BUTTON));
   add_button->set_tag(add_billing_address_button_tag_);
+  add_button->SetFocusBehavior(views::View::FocusBehavior::ALWAYS);
   button_view->AddChildView(add_button.release());
   return button_view;
 }
 
 std::vector<EditorField> CreditCardEditorViewController::GetFieldDefinitions() {
   bool is_server_card = IsEditingServerCard();
   return std::vector<EditorField>{
       {autofill::CREDIT_CARD_NUMBER,
        l10n_util::GetStringUTF16(IDS_AUTOFILL_FIELD_LABEL_CREDIT_CARD_NUMBER),
        EditorField::LengthHint::HINT_SHORT, /*required=*/true,
@@ skipping 372 matching lines @@
   return ValidateValue(combobox->GetTextForRow(combobox->selected_index()),
                        error_message);
 }
 
 bool CreditCardEditorViewController::GetSheetId(DialogViewID* sheet_id) {
   *sheet_id = DialogViewID::CREDIT_CARD_EDITOR_SHEET;
   return true;
 }
 
 }  // namespace payments