chromium/chrome/test/data/extensions/api_test/browser_action/rect_icon/background.js

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

chrome.test.sendMessage('ready', function() {
  chrome.browserAction.setIcon({path: 'rectangle.png'}, function() {
    chrome.test.assertNoLastError();
    chrome.test.notifyPass();
  });
});