Remove most remaining sync/notifier dependencies

sync/notifier/invalidation_handler.cc

Index: sync/notifier/invalidation_handler.cc
diff --git a/sync/engine/model_type_sync_worker.cc b/sync/notifier/invalidation_handler.cc
similarity index 60%
copy from sync/engine/model_type_sync_worker.cc
copy to sync/notifier/invalidation_handler.cc
index 6037a527f4e200674a0fad2c62db87d1b4d4be7e..8ec94402a7ee0b5b5e3a365bccf569992ae4c324 100644
--- a/sync/engine/model_type_sync_worker.cc
+++ b/sync/notifier/invalidation_handler.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_worker.h"
+#include "sync/notifier/invalidation_handler.h"
 
 namespace syncer {
 
-ModelTypeSyncWorker::ModelTypeSyncWorker() {
+InvalidationHandler::InvalidationHandler() {
 }
 
-ModelTypeSyncWorker::~ModelTypeSyncWorker() {
+InvalidationHandler::~InvalidationHandler() {
 }
 
 }  // namespace syncer