sync: Mass rename of non-blocking sync classes

sync/engine/model_type_sync_proxy.cc

Index: sync/engine/model_type_sync_proxy.cc
diff --git a/sync/api/attachments/attachment_downloader.cc b/sync/engine/model_type_sync_proxy.cc
similarity index 60%
copy from sync/api/attachments/attachment_downloader.cc
copy to sync/engine/model_type_sync_proxy.cc
index a0108f70e8941f26b4cbd4bb9429dd5432216207..974dc61aa766b89f5b248e8c748de2a26a26202e 100644
--- a/sync/api/attachments/attachment_downloader.cc
+++ b/sync/engine/model_type_sync_proxy.cc
@@ -2,11 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "sync/api/attachments/attachment_downloader.h"
+#include "sync/engine/model_type_sync_proxy.h"
 
 namespace syncer {
 
-AttachmentDownloader::~AttachmentDownloader() {
+ModelTypeSyncProxy::ModelTypeSyncProxy() {
+}
+
+ModelTypeSyncProxy::~ModelTypeSyncProxy() {
 }
 
 }  // namespace syncer