Experiment with USER_VISIBLE priority for update_jumplisticons_task_runner_

chrome/browser/win/jumplist.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_WIN_JUMPLIST_H_
 #define CHROME_BROWSER_WIN_JUMPLIST_H_
 
 #include <stddef.h>
 
 #include <list>
@@ skipping 134 matching lines @@
   // the list.
   void OnMostVisitedURLsAvailable(
       const history::MostVisitedURLList& data);
 
   // Callback for changes to the incognito mode availability pref.
   void OnIncognitoAvailabilityChanged();
 
   // Helper for RunUpdate() that determines its parameters.
   void PostRunUpdate();
 
-  // Called on a timer to invoke RunUpdateJumpList() after requests storms
-  // have subsided.
+  // Called on a timer to invoke RunUpdateJumpListUserVisiblePriority() after
+  // requests storms have subsided.
   void DeferredRunUpdate();
 
   // history::TopSitesObserver implementation.
   void TopSitesLoaded(history::TopSites* top_sites) override;
   void TopSitesChanged(history::TopSites* top_sites,
                        ChangeReason change_reason) override;
 
   // Tracks FaviconService tasks.
   base::CancelableTaskTracker cancelable_task_tracker_;
 
@@ skipping 25 matching lines @@
   // A task runner running tasks to delete JumpListIconsOld directory.
   scoped_refptr<base::SequencedTaskRunner> delete_jumplisticonsold_task_runner_;
 
   // For callbacks may be run after destruction.
   base::WeakPtrFactory<JumpList> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(JumpList);
 };
 
 #endif  // CHROME_BROWSER_WIN_JUMPLIST_H_