[Payments] Normalize billing address before sending to the merchant.

components/autofill/core/browser/payments/full_card_request.cc

Index: components/autofill/core/browser/payments/full_card_request.cc
diff --git a/components/autofill/core/browser/payments/full_card_request.cc b/components/autofill/core/browser/payments/full_card_request.cc
index f2f63805e588f8e190a5cfd61e5972dc491ecc03..63ee15457240b3616f503594a3c31d2bcbe1f7dd 100644
--- a/components/autofill/core/browser/payments/full_card_request.cc
+++ b/components/autofill/core/browser/payments/full_card_request.cc
@@ -68,6 +68,7 @@ bool FullCardRequest::IsGettingFullCard() const {
   return !!request_;
 }
 
+// TODO(crbug.com/656981): Update the credit card expiration on file.
 void FullCardRequest::OnUnmaskResponse(const UnmaskResponse& response) {
   if (!response.exp_month.empty())
     request_->card.SetRawInfo(CREDIT_CARD_EXP_MONTH, response.exp_month);