[Sync] Use ModelTypeProcessor instead of ModelTypeProcessorImpl.

sync/internal_api/test/null_sync_context_proxy.cc

Index: sync/internal_api/test/null_sync_context_proxy.cc
diff --git a/sync/internal_api/test/null_sync_context_proxy.cc b/sync/internal_api/test/null_sync_context_proxy.cc
index 7d967ecaf255c9ecea7d56e47d2347bce21e7ba7..9beb2f4cdcc941c9cb86abbd7d6a72d1a7df1efe 100644
--- a/sync/internal_api/test/null_sync_context_proxy.cc
+++ b/sync/internal_api/test/null_sync_context_proxy.cc
@@ -16,7 +16,7 @@ void NullSyncContextProxy::ConnectTypeToSync(
     syncer::ModelType type,
     const DataTypeState& data_type_state,
     const UpdateResponseDataList& saved_pending_updates,
-    const base::WeakPtr<ModelTypeProcessorImpl>& type_sync_proxy) {
+    const base::WeakPtr<ModelTypeProcessor>& type_processor) {
   NOTREACHED() << "NullSyncContextProxy is not meant to be used";
 }