Add device policy to disallow shutdown

ash/metrics/user_metrics_recorder.cc

Index: ash/metrics/user_metrics_recorder.cc
diff --git a/ash/metrics/user_metrics_recorder.cc b/ash/metrics/user_metrics_recorder.cc
index e39f4c6627c1145e9342f28739c5652cc0686461..a609c75bc994a9d71d1bf317085b4b1b184040fc 100644
--- a/ash/metrics/user_metrics_recorder.cc
+++ b/ash/metrics/user_metrics_recorder.cc
@@ -63,6 +63,10 @@ void UserMetricsRecorder::RecordUserMetricsAction(UserMetricsAction action) {
       base::RecordAction(
           base::UserMetricsAction("Accel_ShutDown_PowerButton"));
       break;
+    case ash::UMA_ACCEL_RESTART_POWER_BUTTON:

[Daniel Erat, 2014/12/05 19:06:11]

alphabetize

[cschuet (SLOW), 2014/12/08 14:37:43]

Done.

+      base::RecordAction(
+          base::UserMetricsAction("Accel_Restart_PowerButton"));
+      break;
     case ash::UMA_CLOSE_THROUGH_CONTEXT_MENU:
       base::RecordAction(base::UserMetricsAction("CloseFromContextMenu"));
       break;