1 files changed, 29 insertions, 0 deletions
diff --git a/chromium/ui/views/linux_ui/window_button_order_observer.h b/chromium/ui/views/linux_ui/window_button_order_observer.h
new file mode 100644
index 00000000000..96b7cb8290f
--- /dev/null
+++ b/chromium/ui/views/linux_ui/window_button_order_observer.h
@@ -0,0 +1,29 @@
+// Copyright (c) 2013 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_LINUX_UI_WINDOW_BUTTON_ORDER_OBSERVER_H_
+#define UI_VIEWS_LINUX_UI_WINDOW_BUTTON_ORDER_OBSERVER_H_
+
+#include <vector>
+
+#include "ui/views/window/frame_buttons.h"
+
+namespace views {
+
+// Observer interface to receive the ordering of the min,max,close buttons.
+class WindowButtonOrderObserver {
+ public:
+  // Called when first added to the LinuxUI class, or on a system-wide
+  // configuration event.
+  virtual void OnWindowButtonOrderingChange(
+      const std::vector<views::FrameButton>& leading_buttons,
+      const std::vector<views::FrameButton>& trailing_buttons) = 0;
+
+ protected:
+  virtual ~WindowButtonOrderObserver() {}
+};
+
+}  // namespace views
+
+#endif  // UI_VIEWS_LINUX_UI_WINDOW_BUTTON_ORDER_OBSERVER_H_