[Sync] Move some things from driver to base.

components/sync/base/invalidation_helper.h

Index: components/sync/base/invalidation_helper.h
diff --git a/components/sync/driver/invalidation_helper.h b/components/sync/base/invalidation_helper.h
similarity index 77%
rename from components/sync/driver/invalidation_helper.h
rename to components/sync/base/invalidation_helper.h
index 69b6a66a4707fe47f712f58e24d84c3ed4115571..6f987b03211015d99fc932b78f96ec0015a6295c 100644
--- a/components/sync/driver/invalidation_helper.h
+++ b/components/sync/base/invalidation_helper.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef COMPONENTS_SYNC_DRIVER_INVALIDATION_HELPER_H_
-#define COMPONENTS_SYNC_DRIVER_INVALIDATION_HELPER_H_
+#ifndef COMPONENTS_SYNC_BASE_INVALIDATION_HELPER_H_
+#define COMPONENTS_SYNC_BASE_INVALIDATION_HELPER_H_
 
 #include "components/invalidation/public/invalidation_util.h"
 #include "components/sync/base/model_type.h"
@@ -18,4 +18,4 @@ ObjectIdSet ModelTypeSetToObjectIdSet(ModelTypeSet model_types);
 
 }  // namespace syncer
 
-#endif  // COMPONENTS_SYNC_DRIVER_INVALIDATION_HELPER_H_
+#endif  // COMPONENTS_SYNC_BASE_INVALIDATION_HELPER_H_