[WebPayments] Making all fields and buttons focusable

chrome/browser/ui/views/payments/payment_method_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/payment_method_view_controller.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 186 matching lines @@
 
   extra_view->SetLayoutManager(new views::BoxLayout(
       views::BoxLayout::kHorizontal, 0, 0, kPaymentRequestButtonSpacing));
 
   views::LabelButton* button = views::MdTextButton::CreateSecondaryUiButton(
       this, l10n_util::GetStringUTF16(IDS_AUTOFILL_ADD_CREDITCARD_CAPTION));
   button->set_tag(static_cast<int>(
       PaymentMethodViewControllerTags::ADD_CREDIT_CARD_BUTTON));
   button->set_id(
       static_cast<int>(DialogViewID::PAYMENT_METHOD_ADD_CARD_BUTTON));
+  button->SetFocusBehavior(views::View::FocusBehavior::ALWAYS);
   extra_view->AddChildView(button);
 
   return extra_view;
 }
 
 void PaymentMethodViewController::ButtonPressed(views::Button* sender,
                                                 const ui::Event& event) {
   switch (sender->tag()) {
     case static_cast<int>(
         PaymentMethodViewControllerTags::ADD_CREDIT_CARD_BUTTON):
       // Only provide the |on_added| callback, in response to this button.
       dialog()->ShowCreditCardEditor(
           BackNavigationType::kPaymentSheet,
           static_cast<int>(PaymentMethodViewControllerTags::MAX_TAG),
           /*on_edited=*/base::OnceClosure(),
           /*on_added=*/
           base::BindOnce(&PaymentRequestState::AddAutofillPaymentInstrument,
                          base::Unretained(state()), /*selected=*/true),
           /*credit_card=*/nullptr);
       break;
     default:
       PaymentRequestSheetController::ButtonPressed(sender, event);
       break;
   }
 }
 
 }  // namespace payments