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

ui/events/ozone/layout/layout_util.h

+// 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_LAYOUT_LAYOUT_UTIL_H_
+#define UI_EVENTS_OZONE_LAYOUT_LAYOUT_UTIL_H_
+
+// TODO(kpschoedel): consider moving this out of Ozone.
+
+#include "base/strings/string16.h"
+#include "ui/events/keycodes/keyboard_codes.h"
+#include "ui/events/ozone/layout/events_ozone_layout_export.h"
+
+namespace ui {
+
+enum class DomKey;
+
+// Returns the ui::EventFlags value associated with a modifier key,
+// or 0 (EF_NONE) if the key is not a modifier.
+EVENTS_OZONE_LAYOUT_EXPORT int ModifierDomKeyToEventFlag(DomKey key);
+
+}  // namespace ui
+
+#endif  // UI_EVENTS_OZONE_LAYOUT_LAYOUT_UTIL_H_