[Autofill] Support "importing" verified profiles and credit cards.

components/autofill/browser/credit_card.cc

Index: components/autofill/browser/credit_card.cc
diff --git a/components/autofill/browser/credit_card.cc b/components/autofill/browser/credit_card.cc
index 0433231a332d4c046a9c9bed313b018328d6a0ea..c6a641b99b0b3258f0f10fa11dd8e6a7ff160b71 100644
--- a/components/autofill/browser/credit_card.cc
+++ b/components/autofill/browser/credit_card.cc
@@ -498,10 +498,15 @@ bool CreditCard::UpdateFromImportedCard(const CreditCard& imported_card,
     return false;
   }
 
-  DCHECK(!imported_card.IsVerified());
-  if (this->IsVerified())
+  // Heuristically aggregated data should never overwrite verified data.
+  // Instead, discard any heuristically aggregated credit cards that disagree
+  // with explicitly entered data, so that the UI is not cluttered with
+  // duplicate cards.
+  if (this->IsVerified() && !imported_card.IsVerified())
     return true;
 
+  set_origin(imported_card.origin());
+
   // Note that the card number is intentionally not updated, so as to preserve
   // any formatting (i.e. separator characters).  Since the card number is not
   // updated, there is no reason to update the card type, either.