Keyboard Lock Host implementation

components/keyboard_lock/key_event_filter_installer.cc

Index: components/keyboard_lock/key_event_filter_installer.cc
diff --git a/components/keyboard_lock/key_event_filter_installer.cc b/components/keyboard_lock/key_event_filter_installer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9b709ade036cd5cf74b8a3375f74e60bdea83785
--- /dev/null
+++ b/components/keyboard_lock/key_event_filter_installer.cc
@@ -0,0 +1,22 @@
+// 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.
+
+#include "components/keyboard_lock/key_event_filter_installer.h"
+
+#include <memory>
+
+#include "base/logging.h"
+#include "components/keyboard_lock/keyboard_lock_host.h"
+
+namespace keyboard_lock {
+
+KeyEventFilterInstaller::KeyEventFilterInstaller(
+    KeyEventFilterReceiver* receiver) {
+  DCHECK(receiver);
+  receiver->SetKeyEventFilter(std::unique_ptr<KeyEventFilter>(this));
+}
+
+KeyEventFilterInstaller::~KeyEventFilterInstaller() = default;
+
+}  // namespace keyboard_lock