Experiment with USER_VISIBLE priority for update_jumplisticons_task_runner_

chrome/browser/win/jumplist_file_util.cc

 // Copyright (c) 2017 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.
 
 #include "chrome/browser/win/jumplist_file_util.h"
 
 #include <windows.h>
 
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
@@ skipping 105 matching lines @@
     UMA_HISTOGRAM_ENUMERATION("WinJumplist.DeleteStatusJumpListIconsOld",
                               delete_status, FolderDeleteResult::END);
     if (base::DirectoryExists(path))
       dir_status = base::IsDirectoryEmpty(path) ? EMPTY : NON_EMPTY;
   }
 
   UMA_HISTOGRAM_ENUMERATION("WinJumplist.DirectoryStatusJumpListIconsOld",
                             dir_status, DIRECTORY_STATUS_END);
 }
 
-void DeleteDirectoryContentAndLogResults(const base::FilePath& path,
-                                         int max_file_deleted) {
+void DeleteDirectoryContentAndLogResultsUserVisiblePriority(
+    const base::FilePath& path,
+    int max_file_deleted) {
   DirectoryStatus dir_status = NON_EXIST;
 
   // Delete the content in |path|. If |path| doesn't exist, create one.
   if (base::DirectoryExists(path)) {
     FolderDeleteResult delete_status =
         DeleteDirectoryContent(path, kFileDeleteLimit);
 
     UMA_HISTOGRAM_ENUMERATION("WinJumplist.DeleteStatusJumpListIcons",
                               delete_status, FolderDeleteResult::END);
 
     if (base::DirectoryExists(path))
       dir_status = base::IsDirectoryEmpty(path) ? EMPTY : NON_EMPTY;
   } else if (base::CreateDirectory(path)) {
     dir_status = EMPTY;
   }
 
   UMA_HISTOGRAM_ENUMERATION("WinJumplist.DirectoryStatusJumpListIcons",
                             dir_status, DIRECTORY_STATUS_END);
 }