chromeos: Laser tool blocks events from propagating.

ash/aura/wm_shell_aura.cc

Index: ash/aura/wm_shell_aura.cc
diff --git a/ash/aura/wm_shell_aura.cc b/ash/aura/wm_shell_aura.cc
index 2129ba1dd4244c1d2eb6443429a765bd3937fbae..9893378c23ffb257e73f0aefe39ce96340c1c11b 100644
--- a/ash/aura/wm_shell_aura.cc
+++ b/ash/aura/wm_shell_aura.cc
@@ -18,6 +18,7 @@
 #include "ash/common/wm_display_observer.h"
 #include "ash/display/display_manager.h"
 #include "ash/display/window_tree_host_manager.h"
+#include "ash/laser/laser_pointer_controller.h"
 #include "ash/metrics/task_switch_metrics_recorder.h"
 #include "ash/shared/immersive_fullscreen_controller.h"
 #include "ash/shell.h"
@@ -274,6 +275,10 @@ void WmShellAura::ToggleIgnoreExternalKeyboard() {
       ->virtual_keyboard_controller()
       ->ToggleIgnoreExternalKeyboard();
 }
+
+void WmShellAura::SetLaserPointerEnabled(bool enabled) {
+  Shell::GetInstance()->laser_pointer_controller()->SetEnabled(enabled);
+}
 #endif
 
 void WmShellAura::OnWindowActivated(