[payment] display mixed currency in item list and shipping optiopns. When there is more than one cu…

components/payments/content/payment_details_validation.cc

Index: components/payments/content/payment_details_validation.cc
diff --git a/components/payments/content/payment_details_validation.cc b/components/payments/content/payment_details_validation.cc
index 1edd6fb1fa56e2f7138a384bf4264a3fc60aa213..e953cfb70dc9c04b79dcec63d86ccec350e11a0a 100644
--- a/components/payments/content/payment_details_validation.cc
+++ b/components/payments/content/payment_details_validation.cc
@@ -35,11 +35,6 @@ bool validateShippingOptionOrPaymentItem(
     return false;
   }
 
-  if (total && item->amount->currency != total->amount->currency) {
-    *error_message = "Currencies must all be equal";
-    return false;
-  }
-
   if (item->amount->currency_system.empty()) {
     *error_message = "Currency system can't be empty";
     return false;