Allow SequencedTaskRunnerHandle::Get() while running unsequenced tasks.

chromeos/accelerometer/accelerometer_reader.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 "chromeos/accelerometer/accelerometer_reader.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 205 matching lines @@
 };
 
 AccelerometerFileReader::AccelerometerFileReader()
     : initialization_successful_(false),
       observers_(
           new base::ObserverListThreadSafe<AccelerometerReader::Observer>()) {
 }
 
 void AccelerometerFileReader::Initialize(
     scoped_refptr<base::SequencedTaskRunner> sequenced_task_runner) {
-  DCHECK(
-      base::SequencedWorkerPool::GetSequenceTokenForCurrentThread().IsValid());
+  DCHECK(sequenced_task_runner->RunsTasksOnCurrentThread());
   task_runner_ = sequenced_task_runner;
 
   // Check for accelerometer symlink which will be created by the udev rules
   // file on detecting the device.
   if (base::IsDirectoryEmpty(base::FilePath(kAccelerometerDevicePath))) {
     if (base::SysInfo::IsRunningOnChromeOS()) {
       LOG(ERROR) << "Accelerometer device directory is empty at "
                  << kAccelerometerDevicePath;
     }
     return;
@@ skipping 259 matching lines @@
 }
 
 AccelerometerReader::AccelerometerReader()
     : accelerometer_file_reader_(new AccelerometerFileReader()) {
 }
 
 AccelerometerReader::~AccelerometerReader() {
 }
 
 }  // namespace chromeos