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

chrome/browser/ui/views/frame/browser_view.h

Index: chrome/browser/ui/views/frame/browser_view.h
diff --git a/chrome/browser/ui/views/frame/browser_view.h b/chrome/browser/ui/views/frame/browser_view.h
index 7fa6ca98b4efb668aca570e1a4201cd4fd122f00..268a393c47d5850e634f1133acd43d0f02904c5c 100644
--- a/chrome/browser/ui/views/frame/browser_view.h
+++ b/chrome/browser/ui/views/frame/browser_view.h
@@ -55,6 +55,7 @@ class TabStripModel;
 class ToolbarView;
 
 #if defined(OS_WIN)
+class JumpListListener;
 class JumpList;
 #endif
 
@@ -570,6 +571,11 @@ class BrowserView : public BrowserWindow,
   // If search mode is |MODE_NTP| and bookmark bar is visible, stack it at top.
   void MaybeStackBookmarkBarAtTop();
 
+#if defined(OS_WIN)

[sky, 2012/12/18 20:52:38]

and !aura

[Cait (Slow), 2012/12/19 19:27:01]

Done.

+  // Creates and initializes the |jumplist_|.
+  void CreateJumpList();
+#endif
+
   // Last focused view that issued a tab traversal.
   int last_focused_view_storage_id_;
 
@@ -696,8 +702,13 @@ class BrowserView : public BrowserWindow,
   // plugin window.
   HungPluginAction hung_plugin_action_;
 
+  // Helper class to ensure jumplist is not constructed until start-up is
+  // complete.
+  scoped_ptr<JumpListListener> jumplist_listener_;
+
   // The custom JumpList for Windows 7.
   scoped_refptr<JumpList> jumplist_;
+
 #endif
 
 #if defined(USE_ASH)