Do not submit: high level overview patch.

chrome/browser/sessions/session_service.h

Index: chrome/browser/sessions/session_service.h
diff --git a/chrome/browser/sessions/session_service.h b/chrome/browser/sessions/session_service.h
index c596bac599cc41d0691c12d8654edb5a79cc0f9d..f16f3defd4917eed947b487a8f790494b92d805a 100644
--- a/chrome/browser/sessions/session_service.h
+++ b/chrome/browser/sessions/session_service.h
@@ -182,6 +182,10 @@ class SessionService : public BaseSessionService,
                                const SessionID& tab_id,
                                const std::string& user_agent_override);
 
+  void SetTabSessionSyncId(const SessionID& window_id,
+                           const SessionID& tab_id,
+                           const int64& sync_id);
+
   // Callback from GetLastSession.
   // The second parameter is the id of the window that was last active.
   typedef base::Callback<void(ScopedVector<SessionWindow>, SessionID::id_type)>