Laser tool blocks events from propagating.

ash/magnifier/partial_magnification_controller.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/magnifier/partial_magnification_controller.h"
 
+#include "ash/common/system/chromeos/palette/palette_utils.h"
 #include "ash/shell.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/compositor/layer.h"
 #include "ui/compositor/paint_recorder.h"
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
 #include "ui/views/widget/widget.h"
 #include "ui/wm/core/coordinate_conversion.h"
 
-#if defined(OS_CHROMEOS)
-#include "ash/common/system/chromeos/palette/palette_utils.h"
-#endif
-
 namespace ash {
 namespace {
 
 // Ratio of magnifier scale.
 const float kMagnificationScale = 2.f;
 // Radius of the magnifying glass in DIP.
 const int kMagnifierRadius = 200;
 // Size of the border around the magnifying glass in DIP.
 const int kBorderSize = 10;
 // Inset on the zoom filter.
@@ skipping 22 matching lines @@
   for (aura::Window* root_window : root_windows) {
     if (root_window->ContainsPointInRoot(
             root_window->GetHost()->dispatcher()->GetLastMouseLocationInRoot()))
       return root_window;
   }
   return nullptr;
 }
 
 // Returns true if the event should be processed normally, ie, the stylus is
 // over the palette icon or widget.
 bool ShouldSkipEventFiltering(const gfx::Point& point) {

[James Cook, 2016/09/14 22:53:38]

you can eliminate this function too

[sammiequon, 2016/09/16 17:35:26]

Done.

-#if defined(OS_CHROMEOS)
   return PaletteContainsPointInScreen(point);
-#else
-  return false;
-#endif
 }
 
 }  // namespace
 
 // The content mask provides a clipping layer for the magnification window so we
 // can show a circular magnifier.
 class PartialMagnificationController::ContentMask : public ui::LayerDelegate {
  public:
   // If |stroke| is true, the circle will be a stroke. This is useful if we wish
   // to clip a border.
@@ skipping 207 matching lines @@
 
 void PartialMagnificationController::RemoveZoomWidgetObservers() {
   DCHECK(host_widget_);
   host_widget_->RemoveObserver(this);
   aura::Window* root_window = host_widget_->GetNativeView()->GetRootWindow();
   DCHECK(root_window);
   root_window->RemoveObserver(this);
 }
 
 }  // namespace ash