[Web Payments] Refactor the row display code.

chrome/browser/ui/views/payments/payment_request_views_util.h

Index: chrome/browser/ui/views/payments/payment_request_views_util.h
diff --git a/chrome/browser/ui/views/payments/payment_request_views_util.h b/chrome/browser/ui/views/payments/payment_request_views_util.h
index 91762417355dafc000a0fd10615b8321c86d2659..13e250614e9a4e19fa1678f90432b847426be79c 100644
--- a/chrome/browser/ui/views/payments/payment_request_views_util.h
+++ b/chrome/browser/ui/views/payments/payment_request_views_util.h
@@ -15,12 +15,16 @@ class AutofillProfile;
 }
 
 namespace views {
+class Border;
 class VectorIconButtonDelegate;
 class View;
 }
 
 namespace payments {
 
+constexpr int kPaymentRequestRowHorizontalInsets = 14;
+constexpr int kPaymentRequestRowVerticalInsets = 8;
+
 enum class PaymentRequestCommonTags {
   BACK_BUTTON_TAG = 0,
   CLOSE_BUTTON_TAG,
@@ -81,6 +85,10 @@ std::unique_ptr<views::View> GetContactInfoLabel(
     bool show_payer_email,
     bool show_payer_phone);
 
+// Creates a views::Border object that can paint the gray horizontal ruler used
+// as a separator between items in the Payment Request dialog.
+std::unique_ptr<views::Border> CreatePaymentRequestRowBorder();
+
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_VIEWS_UTIL_H_