[Sync] Move ChangeProcessor to model/.

components/sync/BUILD.gn

Index: components/sync/BUILD.gn
diff --git a/components/sync/BUILD.gn b/components/sync/BUILD.gn
index 7ace6dd155a1de9b8d3c3430f6cff880e6d47c4f..5916511f7d541d29290fabe8c4c55e45254176b5 100644
--- a/components/sync/BUILD.gn
+++ b/components/sync/BUILD.gn
@@ -101,8 +101,6 @@ static_library("sync") {
     "driver/backend_data_type_configurer.h",
     "driver/backend_migrator.cc",
     "driver/backend_migrator.h",
-    "driver/change_processor.cc",
-    "driver/change_processor.h",
     "driver/data_type_controller.cc",
     "driver/data_type_controller.h",
     "driver/data_type_encryption_handler.cc",
@@ -406,6 +404,8 @@ static_library("sync") {
     "model/attachments/attachment_service_proxy_for_test.h",
     "model/attachments/attachment_store.cc",
     "model/attachments/attachment_store.h",
+    "model/change_processor.cc",
+    "model/change_processor.h",
     "model/conflict_resolution.cc",
     "model/conflict_resolution.h",
     "model/data_batch.h",
@@ -780,8 +780,6 @@ static_library("test_support_driver") {
   sources = [
     "device_info/local_device_info_provider_mock.cc",
     "device_info/local_device_info_provider_mock.h",
-    "driver/change_processor_mock.cc",
-    "driver/change_processor_mock.h",
     "driver/data_type_controller_mock.cc",
     "driver/data_type_controller_mock.h",
     "driver/data_type_manager_mock.cc",
@@ -804,6 +802,8 @@ static_library("test_support_driver") {
     "driver/non_ui_data_type_controller_mock.h",
     "driver/sync_api_component_factory_mock.cc",
     "driver/sync_api_component_factory_mock.h",
+    "model/change_processor_mock.cc",
+    "model/change_processor_mock.h",
   ]
 
   public_deps = [