Do not submit: high level overview patch.

chrome/browser/sessions/tab_restore_service.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/sessions/tab_restore_service.h"
 
 #include "content/public/browser/session_storage_namespace.h"
 
 // TimeFactory-----------------------------------------------------------------
 
@@ skipping 16 matching lines @@
 
 TabRestoreService::Entry::~Entry() {}
 
 // Tab ------------------------------------------------------------------------
 
 TabRestoreService::Tab::Tab()
     : Entry(TAB),
       current_navigation_index(-1),
       browser_id(0),
       tabstrip_index(-1),
-      pinned(false) {
-}
+      pinned(false),
+      sync_session_id(-1) {}
 
 TabRestoreService::Tab::~Tab() {
 }
 
 // Window ---------------------------------------------------------------------
 
 TabRestoreService::Window::Window() : Entry(WINDOW), selected_tab_index(-1) {
 }
 
 TabRestoreService::Window::~Window() {
 }
 
 // TabRestoreService ----------------------------------------------------------
 
 TabRestoreService::~TabRestoreService() {
 }