Add old_state parameter to CustomButton::StateChanged

chrome/browser/ui/views/payments/payment_request_row_view.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_row_view.h"
 
 #include "chrome/browser/ui/views/payments/payment_request_views_util.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/views/background.h"
 #include "ui/views/border.h"
 
 namespace payments {
 
 PaymentRequestRowView::PaymentRequestRowView(
     views::ButtonListener* listener)
   : views::CustomButton(listener) {
   SetBorder(payments::CreatePaymentRequestRowBorder());
 }
 
 PaymentRequestRowView::~PaymentRequestRowView() {}
 
 // views::CustomButton:
-void PaymentRequestRowView::StateChanged() {
+void PaymentRequestRowView::StateChanged(ButtonState old_state) {
   if (state() == views::Button::STATE_HOVERED ||
       state() == views::Button::STATE_PRESSED) {
     set_background(views::Background::CreateSolidBackground(SK_ColorLTGRAY));
   } else {
     set_background(nullptr);
   }
 }
 
 }  // namespace payments