Autofill - don't prompt to unmask a credit card if the number isn't needed.

components/autofill/core/browser/autofill_manager.h

Index: components/autofill/core/browser/autofill_manager.h
diff --git a/components/autofill/core/browser/autofill_manager.h b/components/autofill/core/browser/autofill_manager.h
index 0568256c62f2b4d02892538e43be25c5cab2c5f2..159db47193881e7702bd6aec07c3ac749a19081f 100644
--- a/components/autofill/core/browser/autofill_manager.h
+++ b/components/autofill/core/browser/autofill_manager.h
@@ -260,6 +260,12 @@ class AutofillManager : public AutofillDownloadManager::Observer,
   // based on it. Returns true if the credit card exists.
   bool GetCreditCard(int unique_id, const CreditCard** credit_card);
 
+  // Determines whether a fill on |form| initiated from |field| will wind up
+  // filling a credit card number. This is useful to determine if we will need
+  // to unmask a card.
+  bool WillFillCreditCardNumber(const FormData& form,
+                                const FormFieldData& field);
+
   // Fills or previews the credit card form.
   // Assumes the form and field are valid.
   void FillOrPreviewCreditCardForm(