Removes MessageLoop::Type checks in favor of IsCurrent on MessageLoops.

base/power_monitor/power_monitor_device_source_win.cc

Index: base/power_monitor/power_monitor_device_source_win.cc
diff --git a/base/power_monitor/power_monitor_device_source_win.cc b/base/power_monitor/power_monitor_device_source_win.cc
index 6609bd0e9e0bd71eefec7ea8591bc6eb8d4603b8..ba00f2f0426d0810d1c59f02088ccdff239be511 100644
--- a/base/power_monitor/power_monitor_device_source_win.cc
+++ b/base/power_monitor/power_monitor_device_source_win.cc
@@ -63,7 +63,7 @@ bool PowerMonitorDeviceSource::IsOnBatteryPowerImpl() {
 
 PowerMonitorDeviceSource::PowerMessageWindow::PowerMessageWindow()
     : instance_(NULL), message_hwnd_(NULL) {
-  if (MessageLoop::current()->type() != MessageLoop::TYPE_UI) {
+  if (!MessageLoopForUI::IsCurrent()) {
     // Creating this window in (e.g.) a renderer inhibits shutdown on Windows.
     // See http://crbug.com/230122. TODO(vandebo): http://crbug.com/236031
     DLOG(ERROR)