Use TaskScheduler instead of blocking pool in supervised_user_authentication.cc.

chrome/browser/chromeos/login/supervised/supervised_user_authentication.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/chromeos/login/supervised/supervised_user_authentication.h"
 
 #include "base/base64.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/macros.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
-#include "base/threading/sequenced_worker_pool.h"
+#include "base/task_scheduler/post_task.h"
 #include "chrome/browser/chromeos/login/supervised/supervised_user_constants.h"
 #include "chrome/browser/chromeos/login/users/supervised_user_manager.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chromeos/cryptohome/signed_secret.pb.h"
 #include "chromeos/login/auth/key.h"
 #include "components/user_manager/user.h"
 #include "components/user_manager/user_manager.h"
-#include "content/public/browser/browser_thread.h"
 #include "crypto/hmac.h"
 #include "crypto/random.h"
 #include "crypto/symmetric_key.h"
 
 namespace chromeos {
 
 namespace {
 
 // Byte size of hash salt.
 const unsigned kSaltSize = 32;
@@ skipping 249 matching lines @@
 }
 
 void SupervisedUserAuthentication::LoadPasswordUpdateData(
     const std::string& user_id,
     const PasswordDataCallback& success_callback,
     const base::Closure& failure_callback) {
   const user_manager::User* user = user_manager::UserManager::Get()->FindUser(
       AccountId::FromUserEmail(user_id));
   base::FilePath profile_path =
       ProfileHelper::GetProfilePathByUserIdHash(user->username_hash());
-  PostTaskAndReplyWithResult(
-      content::BrowserThread::GetBlockingPool()
-          ->GetTaskRunnerWithShutdownBehavior(
-                base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN)
-          .get(),
-      FROM_HERE, base::Bind(&LoadPasswordData, profile_path),
-      base::Bind(&OnPasswordDataLoaded, success_callback, failure_callback));
+  PostTaskWithTraitsAndReplyWithResult(
+      FROM_HERE,
+      base::TaskTraits()
+          .MayBlock()
+          .WithPriority(base::TaskPriority::BACKGROUND)
+          .WithShutdownBehavior(
+              base::TaskShutdownBehavior::CONTINUE_ON_SHUTDOWN),
+      base::BindOnce(&LoadPasswordData, profile_path),
+      base::BindOnce(&OnPasswordDataLoaded, success_callback,
+                     failure_callback));
 }
 
 std::string SupervisedUserAuthentication::BuildPasswordSignature(
     const std::string& password,
     int revision,
     const std::string& base64_signature_key) {
   ac::chrome::managedaccounts::account::Secret secret;
   secret.set_revision(revision);
   secret.set_secret(password);
   std::string buffer;
@@ skipping 11 matching lines @@
     LOG(FATAL) << "HMAC::Sign failed";
 
   std::string raw_result(out_bytes, out_bytes + sizeof(out_bytes));
 
   std::string result;
   base::Base64Encode(raw_result, &result);
   return result;
 }
 
 }  // namespace chromeos