Keyboard Lock Host implementation

components/keyboard_lock/platform_key_hook.h

Index: components/keyboard_lock/platform_key_hook.h
diff --git a/components/keyboard_lock/platform_key_hook.h b/components/keyboard_lock/platform_key_hook.h
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index 0000000000000000000000000000000000000000..69464700cdf1055114a923b704092600798af972
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+++ b/components/keyboard_lock/platform_key_hook.h
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+// 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_HOOK_H_
+#define COMPONENTS_KEYBOARD_LOCK_PLATFORM_KEY_HOOK_H_
+
+#include <memory>
+
+#include "components/keyboard_lock/platform_key_event_filter.h"
+#include "components/keyboard_lock/sync_key_hook.h"
+
+class Browser;
+
+namespace keyboard_lock {
+
+class KeyEventFilter;
+
+class PlatformKeyHook final : public SyncKeyHook {
+ public:
+  PlatformKeyHook(Browser* owner, KeyEventFilter* filter);
+  ~PlatformKeyHook() override;
+
+ private:
+  // SyncKeyHook implementations
+  bool RegisterKey(const std::vector<ui::KeyboardCode>& codes) override;
+  bool UnregisterKey(const std::vector<ui::KeyboardCode>& codes) override;
+
+  Browser* const owner_;
+  PlatformKeyEventFilter filter_;
+};
+
+}  // namespace keyboard_lock
+
+#endif  // COMPONENTS_KEYBOARD_LOCK_PLATFORM_KEY_HOOK_H_