Delay updating jumplist to avoid blocking the file thread at start-up

chrome/browser/jumplist_win.h

Index: chrome/browser/jumplist_win.h
diff --git a/chrome/browser/jumplist_win.h b/chrome/browser/jumplist_win.h
index 8a801ba949797bd234617c0a9e23c373a411b310..62dfe1ca96ef23b797f1e5da750f278693b13fd1 100644
--- a/chrome/browser/jumplist_win.h
+++ b/chrome/browser/jumplist_win.h
@@ -244,6 +244,12 @@ class JumpList : public TabRestoreServiceObserver,
   // Lock for most_visited_pages_, recently_closed_pages_, icon_urls_
   // as they may be used by up to 3 threads.
   base::Lock list_lock_;
+
+  // True if the initial page load is still in progress.
+  bool initial_page_load_pending_;
+
+  // True if an update has been requested before startup completed.
+  bool update_pending_;
 };
 
 #endif  // CHROME_BROWSER_JUMPLIST_WIN_H_