[Payments] Basic validation in the credit card editor.

components/autofill_strings.grdp

Index: components/autofill_strings.grdp
diff --git a/components/autofill_strings.grdp b/components/autofill_strings.grdp
index e2a1b8ec88230639e7b151d95b0efd6e7f0c300b..eae9666eed41fd0109be120ed078e1e2f334f96b 100644
--- a/components/autofill_strings.grdp
+++ b/components/autofill_strings.grdp
@@ -144,11 +144,6 @@
     form signature: <ph name="FORM_SIGNATURE">$7<ex>1234567812345678</ex></ph>
   </message>
 
-  <!-- Autofill dialog: legal documents -->
-  <message name="IDS_AUTOFILL_DIALOG_PRIVACY_POLICY_LINK" desc="The text of an extra link that is appended to the end of whatever other legal documents need to be accepted or updated.">
-    Privacy Policy
-  </message>
-
   <if expr="_google_chrome">
     <message name="IDS_AUTOFILL_OPTIONS_POPUP" desc="The text displayed in the Autofill popup to direct the user to the Autofill settings UI.">
      Chrome Autofill settings...
@@ -347,6 +342,26 @@
     CVC
   </message>
 
+  <!-- Validation -->
+  <message name="IDS_AUTOFILL_VALIDATION_INVALID_NAME" desc="Message displayed to user when name validation fails.">
+    Invalid name.
+  </message>
+  <message name="IDS_AUTOFILL_VALIDATION_INVALID_CREDIT_CARD_NUMBER" desc="Message displayed to user when credit card number validation fails.">
+    Invalid card number.
+  </message>
+  <message name="IDS_AUTOFILL_VALIDATION_INVALID_CREDIT_CARD_EXPIRATION_DATE" desc="Message displayed to user when the credit card expiration date is in an invalid format.">
+    Invalid expiration date.
+  </message>
+  <message name="IDS_AUTOFILL_VALIDATION_INVALID_CREDIT_CARD_EXPIRATION_YEAR" desc="Message displayed to user when the credit card expiration year is in an invalid format.">
+    Invalid expiration year.
+  </message>
+  <message name="IDS_AUTOFILL_VALIDATION_INVALID_CREDIT_CARD_EXPIRATION_MONTH" desc="Message displayed to user when the credit card expiration month is in an invalid format.">
+    Invalid expiration month.
+  </message>
+  <message name="IDS_AUTOFILL_VALIDATION_INVALID_CREDIT_CARD_EXPIRED" desc="Message displayed to user when the credit card is expired.">
+    The card is expired.
+  </message>
+
   <!-- Payment Request -->
   <message name="IDS_PAYMENT_REQUEST_ORDER_SUMMARY_SECTION_NAME" desc="The name of the Order Summary section in the Payment Sheet of the Payment Request dialog.">
     Order summary