Sync: Add DeviceInfo's ChangeProcessor

sync/internal_api/test/test_user_share.cc

Index: sync/internal_api/test/test_user_share.cc
diff --git a/sync/internal_api/test/test_user_share.cc b/sync/internal_api/test/test_user_share.cc
index 1533d639677cbbd91af44456dbd1ae46b21b9f31..5c7856e3aebe5a4b664effaadbdf592374ed1f50 100644
--- a/sync/internal_api/test/test_user_share.cc
+++ b/sync/internal_api/test/test_user_share.cc
@@ -46,6 +46,10 @@ SyncEncryptionHandler* TestUserShare::encryption_handler() {
   return dir_maker_->encryption_handler();
 }
 
+syncable::TestTransactionObserver* TestUserShare::transaction_observer() {
+  return dir_maker_->transaction_observer();
+}
+
 /* static */
 bool TestUserShare::CreateRoot(ModelType model_type, UserShare* user_share) {
   syncer::syncable::Directory* directory = user_share->directory.get();