[System-Keyboard-Lock] Forward navigator functions to RenderFrameHost

content/test/data/keyboard_lock/request_keylock.js

Index: content/test/data/keyboard_lock/request_keylock.js
diff --git a/content/test/data/keyboard_lock/request_keylock.js b/content/test/data/keyboard_lock/request_keylock.js
new file mode 100644
index 0000000000000000000000000000000000000000..1d5fa1cf0a07b31f1f249ee0f92e5dd2f2839633
--- /dev/null
+++ b/content/test/data/keyboard_lock/request_keylock.js
@@ -0,0 +1,17 @@
+// 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.
+
+function test() {
+  try {
+    navigator.requestKeyLock(['a', 'b'])
+      .then(() => {
+        document.getElementById('result').innerHTML = 'Succeeded';
+      })
+      .catch((reason) => {
+        document.getElementById('result').innerHTML = 'Failed: ' + reason;
+      });
+  } catch (exception) {
+    document.getElementById('result').innerHTML = 'Failed: ' + exception;
+  }
+}