Laser tool blocks events from propagating.

ash/shell.h

Index: ash/shell.h
diff --git a/ash/shell.h b/ash/shell.h
index d050826b53c4270a58e506f5b2feb30e790ac599..8c5905d892253e05de73186c3dace399ccac3e37 100644
--- a/ash/shell.h
+++ b/ash/shell.h
@@ -85,6 +85,7 @@ class FirstRunHelper;
 class GPUSupport;
 class HighContrastController;
 class ImmersiveHandlerFactoryAsh;
+class LaserPointerController;
 class LinkHandlerModelFactory;
 class LocaleNotificationController;
 class LockStateController;
@@ -280,6 +281,12 @@ class ASH_EXPORT Shell : public SystemModalContainerEventFilterDelegate,
   TouchTransformerController* touch_transformer_controller() {
     return touch_transformer_controller_.get();
   }
+  LaserPointerController* laser_pointer_controller() {
+    return laser_pointer_controller_.get();
+  }
+  PartialMagnificationController* partial_magnification_controller() {
+    return partial_magnification_controller_.get();
+  }
 #endif  // defined(OS_CHROMEOS)
   ScreenshotController* screenshot_controller() {
     return screenshot_controller_.get();
@@ -304,10 +311,6 @@ class ASH_EXPORT Shell : public SystemModalContainerEventFilterDelegate,
     return magnification_controller_.get();
   }
 
-  PartialMagnificationController* partial_magnification_controller() {
-    return partial_magnification_controller_.get();
-  }
-
   AutoclickController* autoclick_controller() {
     return autoclick_controller_.get();
   }
@@ -472,8 +475,6 @@ class ASH_EXPORT Shell : public SystemModalContainerEventFilterDelegate,
   std::unique_ptr<WindowTreeHostManager> window_tree_host_manager_;
   std::unique_ptr<HighContrastController> high_contrast_controller_;
   std::unique_ptr<MagnificationController> magnification_controller_;
-  std::unique_ptr<PartialMagnificationController>
-      partial_magnification_controller_;
   std::unique_ptr<AutoclickController> autoclick_controller_;
   std::unique_ptr<aura::client::FocusClient> focus_client_;
 
@@ -536,6 +537,10 @@ class ASH_EXPORT Shell : public SystemModalContainerEventFilterDelegate,
   std::unique_ptr<ui::EventHandler> magnifier_key_scroll_handler_;
   std::unique_ptr<ui::EventHandler> speech_feedback_handler_;
   std::unique_ptr<StylusMetricsRecorder> stylus_metrics_recorder_;
+
+  std::unique_ptr<LaserPointerController> laser_pointer_controller_;
+  std::unique_ptr<PartialMagnificationController>
+      partial_magnification_controller_;
 #endif  // defined(OS_CHROMEOS)
 
   // |native_cursor_manager_| is owned by |cursor_manager_|, but we keep a