ppapi/tests/extensions/load_unload/background.js

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 var nacl = null;
   6
   7 function loadNaClModule() {
   8   nacl = document.createElement('embed');
   9   nacl.addEventListener('load', onNaClModuleLoaded, true);
  10   nacl.type = 'application/x-nacl';
  11   nacl.width = 0;
  12   nacl.height = 0;
  13   nacl.src = 'ppapi_tests_extensions_load_unload.nmf';
  14   document.body.appendChild(nacl);
  15
  16   // Request the offsetTop property to force a relayout. As of Apr 10, 2014
  17   // this is needed if the module is being loaded in a background page (see
  18   // crbug.com/350445).
  19   nacl.offsetTop;
  20 }
  21
  22 function detachNaClModule() {
  23   document.body.removeChild(nacl);
  24   nacl = null;
  25 }
  26
  27 function onNaClModuleLoaded() {
  28   chrome.test.sendMessage("nacl_module_loaded");
  29 }
  30
  31 chrome.browserAction.onClicked.addListener(function(tab) {
  32   if (!nacl)
  33     loadNaClModule();
  34   else
  35     detachNaClModule();
  36 });