[Autofill] Sync new wallet metadata fields through Chrome Sync.

components/autofill/core/browser/webdata/autofill_wallet_metadata_syncable_service.h

Index: components/autofill/core/browser/webdata/autofill_wallet_metadata_syncable_service.h
diff --git a/components/autofill/core/browser/webdata/autofill_wallet_metadata_syncable_service.h b/components/autofill/core/browser/webdata/autofill_wallet_metadata_syncable_service.h
index ed530f4f84bdacc3bc4f153fff6ca9903159b9ab..885b1d5bafa6c3861151d4ab1afcd98364588def 100644
--- a/components/autofill/core/browser/webdata/autofill_wallet_metadata_syncable_service.h
+++ b/components/autofill/core/browser/webdata/autofill_wallet_metadata_syncable_service.h
@@ -123,11 +123,25 @@ class AutofillWalletMetadataSyncableService
   // is not present locally.
   syncer::SyncMergeResult MergeData(const syncer::SyncDataList& sync_data);
 
-  // Sends updates to the sync server.
+  // Sends profile updates to the sync server.
   void AutofillDataModelChanged(
       const std::string& server_id,
       const sync_pb::WalletMetadataSpecifics::Type& type,
-      const AutofillDataModel& local);
+      const AutofillProfile& local);
+
+  // Sends credit card updates to the sync server.
+  void AutofillDataModelChanged(
+      const std::string& server_id,
+      const sync_pb::WalletMetadataSpecifics::Type& type,
+      const CreditCard& local);
+
+  // Sends the autofill data model updates to the sync server if the local
+  // version is more recent. Used for both profiles and credit cards.
+  void SendUpdateIfMoreRecent(
+      const sync_pb::WalletMetadataSpecifics::Type& type,
+      const AutofillDataModel& local,
+      const syncer::SyncData& sync_data,
+      const sync_pb::WalletMetadataSpecifics& remote);
 
   base::ThreadChecker thread_checker_;
   AutofillWebDataBackend* web_data_backend_;  // Weak ref.