mus: Disregard windows that explicitly set can_accept_events to be false when sending events.

ui/views/mus/native_widget_mus.h

 // Copyright 2015 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.
 
 #ifndef UI_VIEWS_MUS_NATIVE_WIDGET_MUS_H_
 #define UI_VIEWS_MUS_NATIVE_WIDGET_MUS_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 60 matching lines @@
 // (content_) and attach it to the root.
 class VIEWS_MUS_EXPORT NativeWidgetMus
     : public internal::NativeWidgetPrivate,
       public aura::WindowDelegate,
       public aura::WindowTreeHostObserver,
       public NON_EXPORTED_BASE(ui::InputEventHandler) {
  public:
   NativeWidgetMus(internal::NativeWidgetDelegate* delegate,
                   shell::Connector* connector,
                   ui::Window* window,
-                  ui::mojom::SurfaceType surface_type);
+                  ui::mojom::SurfaceType surface_type,
+                  bool accept_events = true);
   ~NativeWidgetMus() override;
 
   // Configures the set of properties supplied to the window manager when
   // creating a new Window for a Widget.
   static void ConfigurePropertiesForNewWindow(
       const Widget::InitParams& init_params,
       std::map<std::string, std::vector<uint8_t>>* properties);
 
   // Notifies all widgets the frame constants changed in some way.
   static void NotifyFrameChanged(ui::WindowTreeClient* client);
@@ skipping 187 matching lines @@
   std::unique_ptr<ui::ViewProp> prop_;
 
   base::WeakPtrFactory<NativeWidgetMus> close_widget_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeWidgetMus);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_MUS_NATIVE_WIDGET_MUS_H_