Do not submit: high level overview patch.

chrome/browser/sessions/tab_restore_service_helper.cc

Index: chrome/browser/sessions/tab_restore_service_helper.cc
diff --git a/chrome/browser/sessions/tab_restore_service_helper.cc b/chrome/browser/sessions/tab_restore_service_helper.cc
index 32e3406a6ae63c7cc0add06047f5e3b277da0983..47c2c8fbca0b03b47cb5520a069f2c5de2387864 100644
--- a/chrome/browser/sessions/tab_restore_service_helper.cc
+++ b/chrome/browser/sessions/tab_restore_service_helper.cc
@@ -234,15 +234,17 @@ void TabRestoreServiceHelper::RestoreEntryById(
                                                    window->app_name);
       for (size_t tab_i = 0; tab_i < window->tabs.size(); ++tab_i) {
         const Tab& tab = window->tabs[tab_i];
-        WebContents* restored_tab =
-            delegate->AddRestoredTab(tab.navigations, delegate->GetTabCount(),
-                                     tab.current_navigation_index,
-                                     tab.extension_app_id,
-                                     static_cast<int>(tab_i) ==
-                                         window->selected_tab_index,
-                                     tab.pinned, tab.from_last_session,
-                                     tab.session_storage_namespace,
-                                     tab.user_agent_override);
+        WebContents* restored_tab = delegate->AddRestoredTab(
+            tab.navigations,
+            delegate->GetTabCount(),
+            tab.current_navigation_index,
+            tab.extension_app_id,
+            static_cast<int>(tab_i) == window->selected_tab_index,
+            tab.pinned,
+            tab.from_last_session,
+            tab.session_storage_namespace,
+            tab.user_agent_override,
+            tab.sync_session_id);
         if (restored_tab) {
           restored_tab->GetController().LoadIfNecessary();
           RecordAppLaunch(profile_, tab);
@@ -399,6 +401,7 @@ void TabRestoreServiceHelper::PopulateTab(
   if (tab->current_navigation_index == -1 && entry_count > 0)
     tab->current_navigation_index = 0;
   tab->tabstrip_index = index;
+  tab->sync_session_id = tab->sync_session_id;
 
   extensions::TabHelper* extensions_tab_helper =
       extensions::TabHelper::FromWebContents(controller->GetWebContents());
@@ -435,7 +438,8 @@ TabRestoreServiceDelegate* TabRestoreServiceHelper::RestoreTab(
                                  tab.from_last_session,
                                  tab.extension_app_id,
                                  tab.session_storage_namespace,
-                                 tab.user_agent_override);
+                                 tab.user_agent_override,
+                                 tab.sync_session_id);
   } else {
     // We only respsect the tab's original browser if there's no disposition.
     if (disposition == UNKNOWN && tab.has_browser()) {
@@ -464,16 +468,17 @@ TabRestoreServiceDelegate* TabRestoreServiceHelper::RestoreTab(
       tab_index = delegate->GetTabCount();
     }
 
-    WebContents* web_contents = delegate->AddRestoredTab(
-        tab.navigations,
-        tab_index,
-        tab.current_navigation_index,
-        tab.extension_app_id,
-        disposition != NEW_BACKGROUND_TAB,
-        tab.pinned,
-        tab.from_last_session,
-        tab.session_storage_namespace,
-        tab.user_agent_override);
+    WebContents* web_contents =
+        delegate->AddRestoredTab(tab.navigations,
+                                 tab_index,
+                                 tab.current_navigation_index,
+                                 tab.extension_app_id,
+                                 disposition != NEW_BACKGROUND_TAB,
+                                 tab.pinned,
+                                 tab.from_last_session,
+                                 tab.session_storage_namespace,
+                                 tab.user_agent_override,
+                                 tab.sync_session_id);
     web_contents->GetController().LoadIfNecessary();
   }
   RecordAppLaunch(profile_, tab);