Clone of chromium aad1ce808763f59c7a3753e08f1500a104ecc6fd refs/remotes/origin/HEAD
diff --git a/ui/events/device_hotplug_event_observer.h b/ui/events/device_hotplug_event_observer.h
new file mode 100644
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--- /dev/null
+++ b/ui/events/device_hotplug_event_observer.h
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+// Copyright 2014 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_EVENTS_DEVICE_HOTPLUG_EVENT_OBSERVER_H_
+#define UI_EVENTS_DEVICE_HOTPLUG_EVENT_OBSERVER_H_
+
+#include "ui/events/events_base_export.h"
+#include "ui/events/touchscreen_device.h"
+
+namespace ui {
+
+// Listener for specific input device hotplug events.
+class EVENTS_BASE_EXPORT DeviceHotplugEventObserver {
+ public:
+ virtual ~DeviceHotplugEventObserver() {}
+
+ // On a hotplug event this is called with the list of available devices.
+ virtual void OnTouchscreenDevicesUpdated(
+ const std::vector<TouchscreenDevice>& devices) = 0;
+};
+
+} // namespace ui
+
+#endif // UI_EVENTS_DEVICE_HOTPLUG_EVENT_OBSERVER_H_
