Hello,

After updating to React 15.0.1, we are getting the following error:

```
Uncaught TypeError: Cannot read property 'addEventListener' of null
```

![image](https://cloud.githubusercontent.com/assets/4996164/14602577/5bb4e9f2-0571-11e6-9aa1-98de49f50d76.png)

invariant(
    batchingStrategy.isBatchingUpdates,
    'ReactUpdates.asap: Can\'t enqueue an asap callback in a context where' +
    'updates are not being batched.'
  );
  asapCallbackQueue.enqueue(callback, context);
  asapEnqueued = true;
}
var ReactUpdatesInjection = {
  injectReconcileTransaction: function(ReconcileTransaction) {
    invariant(
      ReconcileTransaction,
      'ReactUpdates: must provide a reconcile transaction class'
    );
    ReactUpdates.ReactReconcileTransaction = ReconcileTransaction;
  },
  injectBatchingStrategy: function(_batchingStrategy) {
    invariant(