SproutCore Hack for Android V8? or Kindle Fire?

gistfile1.js

SC.defineProperty = function(obj, keyName, desc, val) {
  var m = meta(obj, false), descs = m.descs, watching = m.watching[keyName]>0;

  if (val === undefined) {
    val = hasDesc(descs, keyName) ? descs[keyName].teardown(obj, keyName) : obj[keyName];
  } else if (hasDesc(descs, keyName)) {
    // FIXME: Hack for Android V8? or Kindle Fire? Throws teardown is undefined error
    if (typeof descs[keyName].teardown === 'function') {
      descs[keyName].teardown(obj, keyName);
    }
  }