Hide cursor upon lock animation

ash/wm/session_state_controller_impl2.cc

Index: ash/wm/session_state_controller_impl2.cc
diff --git a/ash/wm/session_state_controller_impl2.cc b/ash/wm/session_state_controller_impl2.cc
index bb5c68eaa789d0fd7cc7b128e6ac7d3b5ff1694a..4e533a4a9c8472dc24aa768a51d0ef1c8b5b0827 100644
--- a/ash/wm/session_state_controller_impl2.cc
+++ b/ash/wm/session_state_controller_impl2.cc
@@ -263,6 +263,7 @@ void SessionStateControllerImpl2::CancelShutdownAnimation() {
     shutdown_after_lock_ = false;
     return;
   }
+
   animator_->StartGlobalAnimation(
       internal::SessionStateAnimator::ANIMATION_UNDO_GRAYSCALE_BRIGHTNESS,
       internal::SessionStateAnimator::ANIMATION_SPEED_REVERT_SHUTDOWN);
@@ -311,6 +312,11 @@ void SessionStateControllerImpl2::OnLockToShutdownTimeout() {
 }
 
 void SessionStateControllerImpl2::StartCancellableShutdownAnimation() {
+  Shell* shell = ash::Shell::GetInstance();
+  // Hide cursor, but let it reappear if the mouse moves.
+  shell->env_filter()->set_cursor_hidden_by_filter(true);
+  shell->cursor_manager()->HideCursor();
+
   animator_->StartGlobalAnimation(
       internal::SessionStateAnimator::ANIMATION_GRAYSCALE_BRIGHTNESS,
       internal::SessionStateAnimator::ANIMATION_SPEED_SHUTDOWN);