[Sync] Migrate bridge implementations to change list based MergeSyncData

chrome/browser/chromeos/printing/printers_sync_bridge.h

 // Copyright 2017 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 CHROME_BROWSER_CHROMEOS_PRINTING_PRINTERS_SYNC_BRIDGE_H_
 #define CHROME_BROWSER_CHROMEOS_PRINTING_PRINTERS_SYNC_BRIDGE_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 17 matching lines @@
  public:
   PrintersSyncBridge(const syncer::ModelTypeStoreFactory& callback,
                      const base::RepeatingClosure& error_callback);
   ~PrintersSyncBridge() override;
 
   // ModelTypeSyncBridge implementation.
   std::unique_ptr<syncer::MetadataChangeList> CreateMetadataChangeList()
       override;
   base::Optional<syncer::ModelError> MergeSyncData(
       std::unique_ptr<syncer::MetadataChangeList> metadata_change_list,
-      syncer::EntityDataMap entity_data_map) override;
+      syncer::EntityChangeList entity_data) override;
   base::Optional<syncer::ModelError> ApplySyncChanges(
       std::unique_ptr<syncer::MetadataChangeList> metadata_change_list,
       syncer::EntityChangeList entity_changes) override;
   void GetData(StorageKeyList storage_keys, DataCallback callback) override;
   void GetAllData(DataCallback callback) override;
   std::string GetClientTag(const syncer::EntityData& entity_data) override;
   std::string GetStorageKey(const syncer::EntityData& entity_data) override;
   syncer::ConflictResolution ResolveConflict(
       const syncer::EntityData& local_data,
       const syncer::EntityData& remote_data) const override;
@@ skipping 15 matching lines @@
 
   // In memory cache of printer information.
   std::map<std::string, std::unique_ptr<sync_pb::PrinterSpecifics>> all_data_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintersSyncBridge);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_PRINTING_PRINTERS_SYNC_BRIDGE_H_