[Sync] Renaming MetadataChanges to MetadataChangeList, slight metadata ownership tweak, and adding a few stub methods.

BUG=543405

Review URL: https://codereview.chromium.org/1478593002

Cr-Commit-Position: refs/heads/master@{#362450}

2 files changed, 9 insertions, 8 deletions

diff --git a/components/sync_driver/device_info_service.cc b/components/sync_driver/device_info_service.cc
index f210b2f..0a5949e 100644
--- a/components/sync_driver/device_info_service.cc
+++ b/components/sync_driver/device_info_service.cc
@@ -34,20 +34,20 @@ DeviceInfoService::DeviceInfoService(
 
 DeviceInfoService::~DeviceInfoService() {}
 
-syncer_v2::MetadataChanges* DeviceInfoService::CreateMetadataChanges() {
-  // TODO(skym): Implementation.
-  return nullptr;
+scoped_ptr<syncer_v2::MetadataChangeList>
+DeviceInfoService::CreateMetadataChangeList() {
+  return make_scoped_ptr(new syncer_v2::SimpleMetadataChangeList());
 }
 
 syncer::SyncError DeviceInfoService::MergeSyncData(
-    syncer_v2::MetadataChanges* metadata_changes,
+    scoped_ptr<syncer_v2::MetadataChangeList> metadata_change_list,
     syncer_v2::EntityDataList entity_data_list) {
   // TODO(skym): Implementation.
   return syncer::SyncError();
 }
 
 syncer::SyncError DeviceInfoService::ApplySyncChanges(
-    syncer_v2::MetadataChanges* metadata_changes,
+    scoped_ptr<syncer_v2::MetadataChangeList> metadata_change_list,
     syncer_v2::EntityChangeList entity_changes) {
   // TODO(skym): Implementation.
   return syncer::SyncError();
diff --git a/components/sync_driver/device_info_service.h b/components/sync_driver/device_info_service.h
index 76a4126..fdd1127 100644
--- a/components/sync_driver/device_info_service.h
+++ b/components/sync_driver/device_info_service.h
@@ -15,6 +15,7 @@
 #include "components/sync_driver/device_info_tracker.h"
 #include "components/sync_driver/local_device_info_provider.h"
 #include "sync/api/model_type_service.h"
+#include "sync/internal_api/public/simple_metadata_change_list.h"
 
 namespace syncer {
 class SyncError;
@@ -41,12 +42,12 @@ class DeviceInfoService : public syncer_v2::ModelTypeService,
   ~DeviceInfoService() override;
 
   // ModelTypeService implementation.
-  syncer_v2::MetadataChanges* CreateMetadataChanges() override;
+  scoped_ptr<syncer_v2::MetadataChangeList> CreateMetadataChangeList() override;
   syncer::SyncError MergeSyncData(
-      syncer_v2::MetadataChanges* metadata_changes,
+      scoped_ptr<syncer_v2::MetadataChangeList> metadata_change_list,
       syncer_v2::EntityDataList entity_data_list) override;
   syncer::SyncError ApplySyncChanges(
-      syncer_v2::MetadataChanges* metadata_changes,
+      scoped_ptr<syncer_v2::MetadataChangeList> metadata_change_list,
       syncer_v2::EntityChangeList entity_changes) override;
   void LoadMetadata(MetadataCallback callback) override;
   void GetData(ClientKeyList client_keys, DataCallback callback) override;