Supervised users: Post blocking pool tasks with CONTINUE_SHUTDOWN behavior.

chrome/browser/supervised_user/experimental/supervised_user_blacklist.cc

 // Copyright 2014 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/supervised_user/experimental/supervised_user_blacklist.h"
 
 #include <algorithm>
 #include <cstring>
 #include <fstream>
 
@@ skipping 57 matching lines @@
   return std::binary_search(host_hashes_.begin(), host_hashes_.end(), hash);
 }
 
 size_t SupervisedUserBlacklist::GetEntryCount() const {
   return host_hashes_.size();
 }
 
 void SupervisedUserBlacklist::ReadFromFile(const base::FilePath& path,
                                            const base::Closure& done_callback) {
   base::PostTaskAndReplyWithResult(
-      BrowserThread::GetBlockingPool(),
+      BrowserThread::GetBlockingPool()->GetTaskRunnerWithShutdownBehavior(
+          base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN).get(),
       FROM_HERE,
       base::Bind(&ReadFromBinaryFileOnFileThread, path),
       base::Bind(&SupervisedUserBlacklist::OnReadFromFileCompleted,
                  weak_ptr_factory_.GetWeakPtr(),
                  done_callback));
 }
 
 void SupervisedUserBlacklist::OnReadFromFileCompleted(
     const base::Closure& done_callback,
     scoped_ptr<std::vector<Hash> > host_hashes) {
   host_hashes_.swap(*host_hashes);
   LOG_IF(WARNING, host_hashes_.empty()) << "Got empty blacklist";
 
   if (!done_callback.is_null())
     done_callback.Run();
 }