[USS] Add SyncMetadataStore interface

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

 // Copyright 2013 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_TABLE_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_TABLE_H_
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
 #include "components/sync/base/model_type.h"
 #include "components/sync/model/metadata_batch.h"
+#include "components/sync/model/metadata_table.h"
 #include "components/webdata/common/web_database_table.h"
 
 class WebDatabase;
 
 namespace base {
 class Time;
 }
 
 namespace autofill {
 
@@ skipping 213 matching lines @@
 //   storage_key        A string that uniquely identifies the metadata record
 //                      as well as the corresponding autofill record.
 //   value              The serialized EntityMetadata record.
 //
 // autofill_model_type_state
 //                      Single row table that contains the sync ModelTypeState
 //                      for the autofill model type.
 //
 //   value              The serialized ModelTypeState record.
 
-class AutofillTable : public WebDatabaseTable {
+class AutofillTable : public WebDatabaseTable, public syncer::MetadataTable {
  public:
   AutofillTable();
   ~AutofillTable() override;
 
   // Retrieves the AutofillTable* owned by |db|.
   static AutofillTable* FromWebDatabase(WebDatabase* db);
 
   // WebDatabaseTable:
   WebDatabaseTable::TypeKey GetTypeKey() const override;
   bool CreateTablesIfNecessary() override;
@@ skipping 156 matching lines @@
   bool AddAutofillGUIDToTrash(const std::string& guid);
 
   // Clear all profiles.
   bool ClearAutofillProfiles();
 
   // Read all the stored metadata for |model_type| and fill |metadata_batch|
   // with it.
   bool GetAllSyncMetadata(syncer::ModelType model_type,
                           syncer::MetadataBatch* metadata_batch);
 
-  // Update the metadata row for |model_type|, keyed by |storage_key|, to
-  // contain the contents of |metadata|.
+  // syncer::MetadataTable implementation.
   bool UpdateSyncMetadata(syncer::ModelType model_type,
                           const std::string& storage_key,
-                          const sync_pb::EntityMetadata& metadata);
-
-  // Remove the metadata row of type |model_type| keyed by |storage|key|.
+                          const sync_pb::EntityMetadata& metadata) override;
   bool ClearSyncMetadata(syncer::ModelType model_type,
-                         const std::string& storage_key);
-
-  // Update the stored sync state for the |model_type|.
-  bool UpdateModelTypeState(syncer::ModelType model_type,
-                            const sync_pb::ModelTypeState& model_type_state);
-
-  // Clear the stored sync state for |model_type|.
-  bool ClearModelTypeState(syncer::ModelType model_type);
+                         const std::string& storage_key) override;
+  bool UpdateModelTypeState(
+      syncer::ModelType model_type,
+      const sync_pb::ModelTypeState& model_type_state) override;
+  bool ClearModelTypeState(syncer::ModelType model_type) override;
 
   // Table migration functions. NB: These do not and should not rely on other
   // functions in this class. The implementation of a function such as
   // GetCreditCard may change over time, but MigrateToVersionXX should never
   // change.
   bool MigrateToVersion54AddI18nFieldsAndRemoveDeprecatedFields();
   bool MigrateToVersion55MergeAutofillDatesTable();
   bool MigrateToVersion56AddProfileLanguageCodeForFormatting();
   bool MigrateToVersion57AddFullNameField();
   bool MigrateToVersion60AddServerCards();
@@ skipping 93 matching lines @@
   bool InitModelTypeStateTable();
 
   std::unique_ptr<AutofillTableEncryptor> autofill_table_encryptor_;
 
   DISALLOW_COPY_AND_ASSIGN(AutofillTable);
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_WEBDATA_AUTOFILL_TABLE_H_