Sync ui/events to chromium @ https://codereview.chromium.org/1210203002

ui/events/ozone/evdev/event_dispatch_callback.h

Index: ui/events/ozone/evdev/event_dispatch_callback.h
diff --git a/ui/events/ozone/evdev/event_dispatch_callback.h b/ui/events/ozone/evdev/event_dispatch_callback.h
new file mode 100644
index 0000000000000000000000000000000000000000..1974d51fa5a97259c76d2bd6d17e002e064bc188
--- /dev/null
+++ b/ui/events/ozone/evdev/event_dispatch_callback.h
@@ -0,0 +1,18 @@
+// 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_OZONE_EVDEV_EVENT_DISPATCH_CALLBACK_H_
+#define UI_EVENTS_OZONE_EVDEV_EVENT_DISPATCH_CALLBACK_H_
+
+#include "base/callback.h"
+
+namespace ui {
+
+class Event;
+
+typedef base::Callback<void(Event*)> EventDispatchCallback;
+
+}  // namspace ui
+
+#endif  // UI_EVENTS_OZONE_EVDEV_EVENT_DISPATCH_CALLBACK_H_