Keyboard Lock Host implementation

components/keyboard_lock/platform_key_event_filter.h

Index: components/keyboard_lock/platform_key_event_filter.h
diff --git a/components/keyboard_lock/platform_key_event_filter.h b/components/keyboard_lock/platform_key_event_filter.h
new file mode 100644
index 0000000000000000000000000000000000000000..75b7eebd6fb21e8c3c3d0a0d8ad85bbdb1da71c2
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+++ b/components/keyboard_lock/platform_key_event_filter.h
@@ -0,0 +1,27 @@
+// 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_