[WebPayments] Making all fields and buttons focusable

chrome/browser/ui/views/payments/payment_request_sheet_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_request_sheet_controller.h"
 
 #include <utility>
 
 #include "chrome/browser/ui/views/payments/payment_request_dialog_view.h"
 #include "chrome/browser/ui/views/payments/payment_request_views_util.h"
@@ skipping 367 matching lines @@
 bool PaymentRequestSheetController::PerformPrimaryButtonAction() {
   if (primary_button_ && primary_button_->enabled())
     ButtonPressed(primary_button_.get(), DummyEvent());
   return true;
 }
 
 void PaymentRequestSheetController::AddPrimaryButton(views::View* container) {
   primary_button_ = CreatePrimaryButton();
   if (primary_button_) {
     primary_button_->set_owned_by_client();
+    primary_button_->SetFocusBehavior(views::View::FocusBehavior::ALWAYS);
     container->AddChildView(primary_button_.get());
   }
 }
 
 void PaymentRequestSheetController::AddSecondaryButton(views::View* container) {
   secondary_button_ = std::unique_ptr<views::Button>(
       views::MdTextButton::CreateSecondaryUiButton(this,
                                                    GetSecondaryButtonLabel()));
   secondary_button_->set_owned_by_client();
   secondary_button_->set_tag(
       static_cast<int>(PaymentRequestCommonTags::CLOSE_BUTTON_TAG));
   secondary_button_->set_id(static_cast<int>(DialogViewID::CANCEL_BUTTON));
+  secondary_button_->SetFocusBehavior(views::View::FocusBehavior::ALWAYS);
   container->AddChildView(secondary_button_.get());
 }
 
 }  // namespace payments