[Sync] rename USS processor / worker interfaces

sync/engine/model_type_sync_proxy.cc

Index: sync/engine/model_type_sync_proxy.cc
diff --git a/sync/engine/model_type_sync_proxy.cc b/sync/engine/model_type_sync_proxy.cc
deleted file mode 100644
index a6aa215b08d6740f67e096291a5272020efdb664..0000000000000000000000000000000000000000
--- a/sync/engine/model_type_sync_proxy.cc
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright 2014 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.
-
-#include "sync/engine/model_type_sync_proxy.h"
-
-namespace syncer_v2 {
-
-ModelTypeSyncProxy::ModelTypeSyncProxy() {
-}
-
-ModelTypeSyncProxy::~ModelTypeSyncProxy() {
-}
-
-}  // namespace syncer