Prep for moving files into components/invalidation

chrome/browser/sync/glue/invalidation_helper.h

Index: chrome/browser/sync/glue/invalidation_helper.h
diff --git a/chrome/browser/sync/glue/invalidation_helper.h b/chrome/browser/sync/glue/invalidation_helper.h
new file mode 100644
index 0000000000000000000000000000000000000000..3dea357fff6bb3b80e70c5f99545948572fd557d
--- /dev/null
+++ b/chrome/browser/sync/glue/invalidation_helper.h
@@ -0,0 +1,20 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_SYNC_GLUE_INVALIDATION_HELPER_H_
+#define CHROME_BROWSER_SYNC_GLUE_INVALIDATION_HELPER_H_
+
+#include "google/cacheinvalidation/include/types.h"
+#include "sync/internal_api/public/base/invalidation_util.h"
+#include "sync/internal_api/public/base/model_type.h"
+
+namespace syncer {
+
+bool RealModelTypeToObjectId(ModelType model_type,
+                             invalidation::ObjectId* object_id);
+
+ObjectIdSet ModelTypeSetToObjectIdSet(ModelTypeSet model_types);
+}
+
+#endif  // CHROME_BROWSER_SYNC_GLUE_INVALIDATION_HELPER_H_