Linux UI: Add IsVisibleOnAllWorkspaces()

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 140 matching lines @@
   void Hide() override;
   void ShowMaximizedWithBounds(const gfx::Rect& restored_bounds) override;
   void ShowWithWindowState(ui::WindowShowState state) override;
   bool IsVisible() const override;
   void Activate() override;
   void Deactivate() override;
   bool IsActive() const override;
   void SetAlwaysOnTop(bool always_on_top) override;
   bool IsAlwaysOnTop() const override;
   void SetVisibleOnAllWorkspaces(bool always_visible) override;
+  bool IsVisibleOnAllWorkspaces() const override;
   void Maximize() override;
   void Minimize() override;
   bool IsMaximized() const override;
   bool IsMinimized() const override;
   void Restore() override;
   void SetFullscreen(bool fullscreen) override;
   bool IsFullscreen() const override;
   void SetOpacity(float opacity) override;
   void FlashFrame(bool flash_frame) override;
   void RunShellDrag(View* view,
@@ skipping 116 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_