Support the ignored_by_shelf flag for Mus windows.

ui/views/widget/widget.h

 // 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.
 
 #ifndef UI_VIEWS_WIDGET_WIDGET_H_
 #define UI_VIEWS_WIDGET_WIDGET_H_
 
+#include <map>
 #include <memory>
 #include <set>
 #include <stack>
+#include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "base/scoped_observer.h"
 #include "build/build_config.h"
 #include "ui/base/ui_base_types.h"
 #include "ui/events/event_source.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/native_widget_types.h"
@@ skipping 260 matching lines @@
     std::string wm_class_name;
     std::string wm_class_class;
 
     // If true then the widget uses software compositing. Defaults to false.
     // Only used on Windows.
     bool force_software_compositing;
 
     // Used if widget is not activatable to do determine if mouse events should
     // be sent to the widget.
     bool wants_mouse_events_when_inactive = false;
+
+    // A map of properties applied to windows when running in mus.
+    std::map<std::string, std::vector<uint8_t>> mus_properties;
   };
 
   Widget();
   ~Widget() override;
 
   // Creates a decorated window Widget with the specified properties. The
   // returned Widget is owned by its NativeWidget; see Widget class comment for
   // details.
   static Widget* CreateWindowWithParent(WidgetDelegate* delegate,
                                         gfx::NativeView parent);
@@ skipping 667 matching lines @@
   bool movement_disabled_;
 
   ScopedObserver<ui::NativeTheme, ui::NativeThemeObserver> observer_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(Widget);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_WIDGET_H_