Condition added to prevent lock animation on Supervised User creation.

ash/accelerators/accelerator_controller.cc

Index: ash/accelerators/accelerator_controller.cc
diff --git a/ash/accelerators/accelerator_controller.cc b/ash/accelerators/accelerator_controller.cc
index 84f565c63891943c066bc245dd8377122142994c..04c4bb5583a19b54f170e4d979210b94d1b28c6a 100644
--- a/ash/accelerators/accelerator_controller.cc
+++ b/ash/accelerators/accelerator_controller.cc
@@ -1210,8 +1210,8 @@ void  AcceleratorController::PerformAction(AcceleratorAction action,
     case POWER_PRESSED:  // fallthrough
     case POWER_RELEASED:
       if (!base::SysInfo::IsRunningOnChromeOS()) {
-        // There is no powerd in linux desktop, so call the
-        // PowerButtonController here.
+        // There is no powerd, the Chrome OS power manager, in linux desktop,
+        // so call the PowerButtonController here.
         Shell::GetInstance()->power_button_controller()->
             OnPowerButtonEvent(action == POWER_PRESSED, base::TimeTicks());
       }