Keyboard Lock Host implementation

components/keyboard_lock/platform_key_event_filter.h

+// Copyright 2017 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 COMPONENTS_KEYBOARD_LOCK_PLATFORM_KEY_EVENT_FILTER_H_
+#define COMPONENTS_KEYBOARD_LOCK_PLATFORM_KEY_EVENT_FILTER_H_
+
+#include "ui/events/platform/platform_event_types.h"
+
+namespace keyboard_lock {
+
+class KeyEventFilter;
+
+class PlatformKeyEventFilter final {
+ public:
+  PlatformKeyEventFilter(KeyEventFilter* filter);
+  ~PlatformKeyEventFilter();
+
+  bool OnPlatformEvent(const ui::PlatformEvent& event);
+
+ private:
+  KeyEventFilter* const filter_;
+};
+
+}  // namespace keyboard_lock
+
+#endif  // COMPONENTS_KEYBOARD_LOCK_PLATFORM_KEY_EVENT_FILTER_H_