text: // Copyright 2015 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.
  
  chrome.audio.OnMuteChanged.addListener(function (is_input, is_muted) {
    if (is_input === false && is_muted === false) {
      chrome.test.sendMessage("success");
    } else {
      console.error("Got unexpected OnMuteChanged event is_input:" + is_input +
                    " is_muted:" + is_muted);
      chrome.test.sendMessage("failure");
    }
  });
  chrome.test.sendMessage("loaded");
  