Downloads: replace BrowserThread::FILE with task scheduler.

chrome/browser/download/download_prefs.cc

 // 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.
 
 #include "chrome/browser/download/download_prefs.h"
 
 #include <stddef.h>
 
 #include <string>
 #include <vector>
@@ skipping 112 matching lines @@
     const base::FilePath current = prefs->GetFilePath(path_pref[i]);
     base::FilePath migrated;
     if (!current.empty() &&
         file_manager::util::MigratePathFromOldFormat(
             profile_, current, &migrated)) {
       prefs->SetFilePath(path_pref[i], migrated);
     }
   }
 
   // Ensure that the default download directory exists.
-  BrowserThread::PostTask(
-      BrowserThread::FILE, FROM_HERE,
-      base::BindOnce(base::IgnoreResult(&base::CreateDirectory),
-                     GetDefaultDownloadDirectoryForProfile()));
+  content::DownloadManager::GetTaskRunner()->PostTask(
+      FROM_HERE, base::BindOnce(base::IgnoreResult(&base::CreateDirectory),
+                                GetDefaultDownloadDirectoryForProfile()));
 #endif  // defined(OS_CHROMEOS)
 
 #if defined(OS_WIN) || defined(OS_LINUX) || defined(OS_MACOSX)
   should_open_pdf_in_system_reader_ =
       prefs->GetBoolean(prefs::kOpenPdfDownloadInSystemReader);
 #endif
 
   // If the download path is dangerous we forcefully reset it. But if we do
   // so we set a flag to make sure we only do it once, to avoid fighting
   // the user if they really want it on an unsafe place such as the desktop.
@@ skipping 249 matching lines @@
     extensions.erase(extensions.size() - 1);
 
   profile_->GetPrefs()->SetString(prefs::kDownloadExtensionsToOpen, extensions);
 }
 
 bool DownloadPrefs::AutoOpenCompareFunctor::operator()(
     const base::FilePath::StringType& a,
     const base::FilePath::StringType& b) const {
   return base::FilePath::CompareLessIgnoreCase(a, b);
 }