[Sync] Add support for sync Persistence Errors

chrome/browser/extensions/api/storage/settings_sync_unittest.cc

Index: chrome/browser/extensions/api/storage/settings_sync_unittest.cc
diff --git a/chrome/browser/extensions/api/storage/settings_sync_unittest.cc b/chrome/browser/extensions/api/storage/settings_sync_unittest.cc
index 81537aabd23b4d2f517707266397cf86d4bfe0ff..b1b22a992c738b34a9e530cea6321a7fced264ba 100644
--- a/chrome/browser/extensions/api/storage/settings_sync_unittest.cc
+++ b/chrome/browser/extensions/api/storage/settings_sync_unittest.cc
@@ -97,6 +97,7 @@ class MockSyncChangeProcessor : public syncer::SyncChangeProcessor {
     if (fail_all_requests_) {
       return syncer::SyncError(
           FROM_HERE,
+          syncer::SyncError::DATATYPE_ERROR,
           "MockSyncChangeProcessor: configured to fail",
           change_list[0].sync_data().GetDataType());
     }