[Autofill] Sort profiles and credit cards by frecency in PaymentRequest.

components/autofill/core/browser/personal_data_manager.h

Index: components/autofill/core/browser/personal_data_manager.h
diff --git a/components/autofill/core/browser/personal_data_manager.h b/components/autofill/core/browser/personal_data_manager.h
index 3513d9e21f2d6fa9a335644a9bd78417fcc5a656..919865142548ea4295af5a5f342a673c467ee9ad 100644
--- a/components/autofill/core/browser/personal_data_manager.h
+++ b/components/autofill/core/browser/personal_data_manager.h
@@ -177,6 +177,9 @@ class PersonalDataManager : public KeyedService,
   // Returns true if there is some data synced from Wallet.
   bool HasServerData() const;
 
+  // Returns the profiles to suggest to the user, ordered by frecency.
+  const std::vector<AutofillProfile*> GetProfilesToSuggest() const;
+
   // Loads profiles that can suggest data for |type|. |field_contents| is the
   // part the user has already typed. |field_is_autofilled| is true if the field
   // has already been autofilled. |other_field_types| represents the rest of
@@ -187,6 +190,10 @@ class PersonalDataManager : public KeyedService,
       bool field_is_autofilled,
       const std::vector<ServerFieldType>& other_field_types);
 
+  // Returns the credit cards to suggest to the users. Those have been deduped
+  // and ordered by frecency with the expired cards at the back.

[Mathieu, 2016/05/20 13:57:09]

nit: back -> end of the list?

[sebsg, 2016/05/24 17:27:32]

Done.

+  const std::vector<CreditCard*> GetCreditCardsToSuggest() const;
+
   // Gets credit cards that can suggest data for |type|. See
   // GetProfileSuggestions for argument descriptions. The variant in each
   // GUID pair should be ignored.
@@ -235,7 +242,7 @@ class PersonalDataManager : public KeyedService,
   // local duplicates, and local cards are preferred over their masked server
   // card duplicate.
   static void DedupeCreditCardToSuggest(
-      std::list<const CreditCard*>* cards_to_suggest);
+      std::list<CreditCard*>* cards_to_suggest);
 
  protected:
   // Only PersonalDataManagerFactory and certain tests can create instances of
@@ -395,7 +402,7 @@ class PersonalDataManager : public KeyedService,
   std::vector<Suggestion> GetSuggestionsForCards(
       const AutofillType& type,
       const base::string16& field_contents,
-      const std::list<const CreditCard*>& cards_to_suggest) const;
+      const std::vector<CreditCard*>& cards_to_suggest) const;
 
   const std::string app_locale_;