Add WindowPinType property on arua::Window

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h

Index: ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
index 757b7808e08cc403f11b1e573661245b8ec18c4d..3bdc68e7af8a263d7f3033858ee62ed9407e1d4f 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
@@ -120,9 +120,11 @@ class VIEWS_EXPORT DesktopWindowTreeHostX11
   bool IsActive() const override;
   void Maximize() override;
   void Minimize() override;
+  void Pin(bool trusted) override;
   void Restore() override;
   bool IsMaximized() const override;
   bool IsMinimized() const override;
+  bool IsPinned() const override;
   bool HasCapture() const override;
   void SetAlwaysOnTop(bool always_on_top) override;
   bool IsAlwaysOnTop() const override;