Reorder browser list on workspace switch

ui/views/widget/desktop_aura/x11_desktop_handler_observer.h

+// Copyright 2016 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_DESKTOP_AURA_X11_DESKTOP_HANDLER_OBSERVER_H_
+#define UI_VIEWS_WIDGET_DESKTOP_AURA_X11_DESKTOP_HANDLER_OBSERVER_H_
+
+#include <string>
+
+#include "ui/views/views_export.h"
+
+namespace views {
+
+class VIEWS_EXPORT X11DesktopHandlerObserver {
+ public:
+  // Called when the (platform-specific) workspace ID changes to
+  // |new_workspace|.
+  virtual void OnWorkspaceChanged(const std::string& new_workspace) = 0;
+
+ protected:
+  virtual ~X11DesktopHandlerObserver() {}
+};
+
+}  // namespace views
+
+#endif  // UI_DISPLAY_DESKTOP_OBSERVER_H_