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

content/test/data/keyboard_lock/request_keylock_twice.js

+// 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\n';
+      })
+      .catch((reason) => {
+        document.getElementById('result').innerHTML +=
+            'Failed: ' + reason + '\n';
+      });
+    navigator.requestKeyLock(['c', 'd'])
+      .then(() => {
+        document.getElementById('result').innerHTML += 'Succeeded\n';
+      })
+      .catch((reason) => {
+        document.getElementById('result').innerHTML +=
+            'Failed: ' + reason + '\n';
+      });
+  } catch (exception) {
+    document.getElementById('result').innerHTML +=
+        'Failed: ' + exception + '\n';
+  }
+}