[Sync] rename USS processor / worker interfaces

sync/engine/commit_queue.cc

Index: sync/engine/commit_queue.cc
diff --git a/sync/engine/model_type_sync_proxy.cc b/sync/engine/commit_queue.cc
similarity index 62%
rename from sync/engine/model_type_sync_proxy.cc
rename to sync/engine/commit_queue.cc
index a6aa215b08d6740f67e096291a5272020efdb664..1a0e58bb220be30fec8e18d30234a9b514214cdc 100644
--- a/sync/engine/model_type_sync_proxy.cc
+++ b/sync/engine/commit_queue.cc
@@ -2,14 +2,14 @@
 // 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"
+#include "sync/engine/commit_queue.h"
 
 namespace syncer_v2 {
 
-ModelTypeSyncProxy::ModelTypeSyncProxy() {
+CommitQueue::CommitQueue() {
 }
 
-ModelTypeSyncProxy::~ModelTypeSyncProxy() {
+CommitQueue::~CommitQueue() {
 }
 
 }  // namespace syncer