Fix DCHECK() when updating instruments with no phone number.

components/autofill/content/browser/wallet/wallet_client.cc

Index: components/autofill/content/browser/wallet/wallet_client.cc
diff --git a/components/autofill/content/browser/wallet/wallet_client.cc b/components/autofill/content/browser/wallet/wallet_client.cc
index 30fd6186abc7d722691239ed852b332db559d0f7..6f39021db95a4d3665a8b9d3fda6bb11bec0f215 100644
--- a/components/autofill/content/browser/wallet/wallet_client.cc
+++ b/components/autofill/content/browser/wallet/wallet_client.cc
@@ -408,8 +408,7 @@ void WalletClient::SaveToWallet(scoped_ptr<Instrument> instrument,
                              instrument->address()->phone_number());
     } else {
       DCHECK(instrument->address() ||
-             (instrument->expiration_month() > 0 &&
-              instrument->expiration_year() > 0));
+             instrument->expiration_differs_from_server());
 
       request_dict.SetString(kUpgradedInstrumentIdKey,
                              instrument->object_id());
@@ -422,8 +421,8 @@ void WalletClient::SaveToWallet(scoped_ptr<Instrument> instrument,
             instrument->address()->ToDictionaryWithoutID().release());
       }
 
-      if (instrument->expiration_month() > 0 &&
-          instrument->expiration_year() > 0) {
+      if (instrument->expiration_differs_from_server()) {
+        // Updating expiration date requires a CVC.
         DCHECK(!instrument->card_verification_number().empty());
         request_dict.SetInteger(kInstrumentExpMonthKey,
                                 instrument->expiration_month());