TombstoneTab      540 chrome/browser/sync/sessions2/sessions_sync_manager.cc       syncer::SyncChange tombstone(TombstoneTab(specifics));
TombstoneTab      557 chrome/browser/sync/sessions2/sessions_sync_manager.cc           syncer::SyncChange tombstone(TombstoneTab(specifics));
TombstoneTab      231 chrome/browser/sync/sessions2/sessions_sync_manager.h   syncer::SyncChange TombstoneTab(const sync_pb::SessionSpecifics& tab);