Add card details and legal message to Android save credit card infobar.

components/autofill/core/browser/credit_card.h

Index: components/autofill/core/browser/credit_card.h
diff --git a/components/autofill/core/browser/credit_card.h b/components/autofill/core/browser/credit_card.h
index cb2ab21ed32858657d6570027f10f429b475c813..2cd83b85e3965faf7fd771a1207772e3aba52dd0 100644
--- a/components/autofill/core/browser/credit_card.h
+++ b/components/autofill/core/browser/credit_card.h
@@ -63,6 +63,8 @@ class CreditCard : public AutofillDataModel {
 
 // This method is not compiled on iOS because the resources are not used and
 // should not be shipped.
+// TODO(jdonnelly): Use credit card issuer images on iOS.
+// http://crbug.com/535784
 #if !defined(OS_IOS)
   // The ResourceBundle ID for the appropriate credit card image.
   static int IconResourceId(const std::string& type);
@@ -113,6 +115,9 @@ class CreditCard : public AutofillDataModel {
   // A label for this credit card formatted as 'Cardname - 2345'.
   base::string16 TypeAndLastFourDigits() const;
 
+  // The expiration for this credit card formatted as 'Exp: 06/17'.
+  base::string16 AbbreviatedExpirationDateForDisplay() const;

[Evan Stade, 2016/01/13 04:09:19]

given that this is only used in one place (I think) can we just put it there?
Especially as this is only used on mobile.

[Justin Donnelly, 2016/01/13 15:32:28]

This will also be used on Views, Cocoa and iOS in subsequent changes.

[please use gerrit instead, 2016/01/13 21:22:09]

Acknowledged.

+
   const std::string& type() const { return type_; }
 
   int expiration_month() const { return expiration_month_; }