[Sync] rename USS processor / worker interfaces

sync/BUILD.gn

Index: sync/BUILD.gn
diff --git a/sync/BUILD.gn b/sync/BUILD.gn
index bfa75c4cb31c40c3e0027d9c63ae458bb5b73472..1fdae2dc69996677557318dd2ff9896ad80159b0 100644
--- a/sync/BUILD.gn
+++ b/sync/BUILD.gn
@@ -58,6 +58,8 @@ source_set("sync_core") {
     "engine/commit_contributor.h",
     "engine/commit_processor.cc",
     "engine/commit_processor.h",
+    "engine/commit_queue.cc",
+    "engine/commit_queue.h",
     "engine/commit_util.cc",
     "engine/commit_util.h",
     "engine/conflict_resolver.cc",
@@ -80,12 +82,10 @@ source_set("sync_core") {
     "engine/get_updates_processor.h",
     "engine/model_type_entity.cc",
     "engine/model_type_entity.h",
-    "engine/model_type_sync_proxy.cc",
-    "engine/model_type_sync_proxy.h",
+    "engine/model_type_processor.cc",
+    "engine/model_type_processor.h",
     "engine/model_type_sync_proxy_impl.cc",
     "engine/model_type_sync_proxy_impl.h",
-    "engine/model_type_sync_worker.cc",
-    "engine/model_type_sync_worker.h",
     "engine/model_type_sync_worker_impl.cc",
     "engine/model_type_sync_worker_impl.h",
     "engine/net/server_connection_manager.cc",
@@ -471,12 +471,12 @@ static_library("test_support_sync_core") {
     "test/engine/fake_sync_scheduler.h",
     "test/engine/injectable_sync_context_proxy.cc",
     "test/engine/injectable_sync_context_proxy.h",
+    "test/engine/mock_commit_queue.cc",
+    "test/engine/mock_commit_queue.h",
     "test/engine/mock_connection_manager.cc",
     "test/engine/mock_connection_manager.h",
-    "test/engine/mock_model_type_sync_proxy.cc",
-    "test/engine/mock_model_type_sync_proxy.h",
-    "test/engine/mock_model_type_sync_worker.cc",
-    "test/engine/mock_model_type_sync_worker.h",
+    "test/engine/mock_model_type_processor.cc",
+    "test/engine/mock_model_type_processor.h",
     "test/engine/mock_nudge_handler.cc",
     "test/engine/mock_nudge_handler.h",
     "test/engine/mock_update_handler.cc",