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)

ensureInjected();
  
  
  
  
  
  if (!batchingStrategy.isBatchingUpdates) {
    batchingStrategy.batchedUpdates(enqueueUpdate, component);
    return;
  }
  dirtyComponents.push(component);
}
/**
 * Enqueue a callback to be run at the end of the current batching cycle. Throws
 * if no updates are currently being performed.
 */
function asap(callback, context) {