Add device policy to disallow shutdown

ash/test/test_lock_state_controller_delegate.cc

Index: ash/test/test_lock_state_controller_delegate.cc
diff --git a/ash/test/test_lock_state_controller_delegate.cc b/ash/test/test_lock_state_controller_delegate.cc
index 55e46ac60473dfe9fd63a97d01b2cb0c7c6fde56..42a2458846200c32188aef8c8842b31c4ab254e0 100644
--- a/ash/test/test_lock_state_controller_delegate.cc
+++ b/ash/test/test_lock_state_controller_delegate.cc
@@ -9,6 +9,7 @@ namespace test {
 
 TestLockStateControllerDelegate::TestLockStateControllerDelegate()
     : num_lock_requests_(0),
+      num_restart_requests_(0),
       num_shutdown_requests_(0) {
 }
 
@@ -19,6 +20,10 @@ void TestLockStateControllerDelegate::RequestLockScreen() {
   ++num_lock_requests_;
 }
 
+void TestLockStateControllerDelegate::RequestRestart() {
+  ++num_restart_requests_;
+}
+
 void TestLockStateControllerDelegate::RequestShutdown() {
   ++num_shutdown_requests_;
 }