Remove calls to MessageLoop::current() in base.

base/power_monitor/power_monitor_device_source.cc

 // Copyright 2013 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 "base/power_monitor/power_monitor_device_source.h"
 
+#include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "build/build_config.h"
 
 namespace base {
 
 #if defined(ENABLE_BATTERY_MONITORING)
 // The amount of time (in ms) to wait before running the initial
 // battery check.
 static int kDelayedBatteryCheckMs = 10 * 1000;
 #endif  // defined(ENABLE_BATTERY_MONITORING)
 
 PowerMonitorDeviceSource::PowerMonitorDeviceSource() {
-  DCHECK(MessageLoop::current());
+  DCHECK(ThreadTaskRunnerHandle::IsSet());
 #if defined(ENABLE_BATTERY_MONITORING)
   delayed_battery_check_.Start(FROM_HERE,
       base::TimeDelta::FromMilliseconds(kDelayedBatteryCheckMs), this,
       &PowerMonitorDeviceSource::BatteryCheck);
 #endif  // defined(ENABLE_BATTERY_MONITORING)
 #if defined(OS_MACOSX)
   PlatformInit();
 #endif
 }
 
 PowerMonitorDeviceSource::~PowerMonitorDeviceSource() {
 #if defined(OS_MACOSX)
   PlatformDestroy();
 #endif
 }
 
 void PowerMonitorDeviceSource::BatteryCheck() {
   ProcessPowerEvent(PowerMonitorSource::POWER_STATE_EVENT);
 }
 
 }  // namespace base