Fixes couple of bugs triggered on chromeos when restoring a tab:

chrome/browser/sessions/tab_restore_service_helper.h

Index: chrome/browser/sessions/tab_restore_service_helper.h
diff --git a/chrome/browser/sessions/tab_restore_service_helper.h b/chrome/browser/sessions/tab_restore_service_helper.h
index 4f8f1e0e1ca08e2a63a906a73ceb4f752118f541..f17364850bc941f83a3781ebfcf3658648fb3550 100644
--- a/chrome/browser/sessions/tab_restore_service_helper.h
+++ b/chrome/browser/sessions/tab_restore_service_helper.h
@@ -90,6 +90,9 @@ class TabRestoreServiceHelper {
   // Notifies observers the tabs have changed.
   void NotifyTabsChanged();
 
+  // Notifies observers the service has loaded.
+  void NotifyLoaded();
+
   // Adds |entry| to the list of entries and takes ownership. If |prune| is true
   // |PruneAndNotify| is invoked. If |to_front| is true the entry is added to
   // the front, otherwise the back. Normal closes go to the front, but