[autofill] Sync server card and address metadata.

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
new file mode 100644
index 0000000000000000000000000000000000000000..85986d8f45434d41339d134f8a5fddddeec29838
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+++ b/components/autofill/core/browser/webdata/autofill_wallet_metadata_syncable_service.h
@@ -0,0 +1,98 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_WALLET_METADATA_SYNCABLE_SERVICE_H_
+#define COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_WALLET_METADATA_SYNCABLE_SERVICE_H_
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/scoped_observer.h"
+#include "base/supports_user_data.h"
+#include "base/threading/thread_checker.h"
+#include "components/autofill/core/browser/webdata/autofill_webdata_service_observer.h"
+#include "sync/api/syncable_service.h"
+
+namespace autofill {
+
+class AutofillProfile;
+class AutofillWebDataBackend;
+class AutofillWebDataService;
+class CreditCard;
+
+// Syncs usage counts and last use dates for Wallet cards and addresses.
+class AutofillWalletMetadataSyncableService
+    : public base::SupportsUserData::Data,
+      public syncer::SyncableService,
+      public AutofillWebDataServiceObserverOnDBThread {
+ public:
+  ~AutofillWalletMetadataSyncableService() override;
+
+  // syncer::SyncableService implementation.
+  syncer::SyncMergeResult MergeDataAndStartSyncing(
+      syncer::ModelType type,
+      const syncer::SyncDataList& initial_sync_data,
+      scoped_ptr<syncer::SyncChangeProcessor> sync_processor,
+      scoped_ptr<syncer::SyncErrorFactory> sync_error_factory) override;
+  void StopSyncing(syncer::ModelType type) override;
+  syncer::SyncDataList GetAllSyncData(syncer::ModelType type) const override;
+  syncer::SyncError ProcessSyncChanges(
+      const tracked_objects::Location& from_here,
+      const syncer::SyncChangeList& change_list) override;
+
+  // AutofillWebDataServiceObserverOnDBThread implementation.
+  void AutofillProfileChanged(const AutofillProfileChange& change) override;
+  void CreditCardChanged(const CreditCardChange& change) override;
+  void AutofillMultipleChanged() override;
+
+  // Creates a new AutofillWalletMetadataSyncableService and hangs it off of
+  // |web_data_service|, which takes ownership. This method should only be
+  // called on |web_data_service|'s DB thread.
+  static void CreateForWebDataServiceAndBackend(
+      AutofillWebDataService* web_data_service,
+      AutofillWebDataBackend* webdata_backend,
+      const std::string& app_locale);
+
+  // Retrieves the AutofillWalletMetadataSyncableService stored on
+  // |web_data_service|.
+  static AutofillWalletMetadataSyncableService* FromWebDataService(
+      AutofillWebDataService* web_data_service);
+
+ protected:
+  AutofillWalletMetadataSyncableService(AutofillWebDataBackend* webdata_backend,
+                                        const std::string& app_locale);
+
+  // Overridden in tests.
+  virtual bool GetServerProfiles(std::vector<AutofillProfile*>* profiles) const;
+  virtual bool GetServerCreditCards(
+      std::vector<CreditCard*>* credit_cards) const;
+  virtual bool UpdateServerAddressUsageStats(const AutofillProfile& profile);
+  virtual bool UpdateServerCardUsageStats(const CreditCard& credit_card);
+
+ private:
+  // Updates local and remote metadata.
+  // Deletes remote metadata for which there's no local Wallet data.
+  // Adds missing remote metadata.
+  syncer::SyncError Reconcile(const syncer::SyncDataList& sync_data);
+
+  // Populates the provided |profiles| and |cards| with mappings from server ID
+  // to unowned server profiles and server cards. Returns true on success.
+  bool GetServerData(std::map<std::string, AutofillProfile*>* profiles,
+                     std::map<std::string, CreditCard*>* cards);
+
+  base::ThreadChecker thread_checker_;
+  AutofillWebDataBackend* webdata_backend_;  // Weak ref.
+  ScopedObserver<AutofillWebDataBackend, AutofillWalletMetadataSyncableService>
+      scoped_observer_;
+  scoped_ptr<syncer::SyncChangeProcessor> sync_processor_;
+  scoped_ptr<syncer::SyncErrorFactory> sync_error_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(AutofillWalletMetadataSyncableService);
+};
+
+}  // namespace autofill
+
+#endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_WALLET_METADATA_SYNCABLE_SERVICE_H_