events: Introduce PlatformEventDispatcher and PlatformEventSource.

ui/events/platform/platform_event_types.h

Index: ui/events/platform/platform_event_types.h
diff --git a/ui/events/platform/platform_event_types.h b/ui/events/platform/platform_event_types.h
new file mode 100644
index 0000000000000000000000000000000000000000..dedb38ff0630af46c6024c1272a3c39b0a81af29
--- /dev/null
+++ b/ui/events/platform/platform_event_types.h
@@ -0,0 +1,14 @@
+// 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_PLATFORM_PLATFORM_EVENT_TYPES_H_
+#define UI_EVENTS_PLATFORM_PLATFORM_EVENT_TYPES_H_
+
+#include "base/event_types.h"
+
+namespace ui {
+typedef base::NativeEvent PlatformEvent;
+}  // namespace ui
+
+#endif  // UI_EVENTS_PLATFORM_PLATFORM_EVENT_TYPES_H_