Fix stability and data racing issues, coalesce more updates for JumpList

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 0b714ec406baa1d2fb13518c16c3224fc18154b8..a57bbff8aca278fb2a23ff0e0066d36627237b33 100644
--- a/chrome/browser/ui/views/frame/browser_view.h
+++ b/chrome/browser/ui/views/frame/browser_view.h
@@ -689,7 +689,7 @@ class BrowserView : public BrowserWindow,
   std::unique_ptr<LoadCompleteListener> load_complete_listener_;
 
   // The custom JumpList for Windows 7.

[grt (UTC plus 2), 2017/06/12 20:43:38]

nit: remove "7" since the jumplist applies to all versions of Windows that
Chrome runs on.

[chengx, 2017/06/12 22:05:30]

Done.

-  scoped_refptr<JumpList> jumplist_;
+  JumpList* jumplist_;

[grt (UTC plus 2), 2017/06/12 20:43:38]

 = nullptr;

[chengx, 2017/06/12 22:05:30]

Done.

 #endif
 
   // The timer used to update frames for the Loading Animation.