openlayers/ol3 — pull request #297 by twpayne (2013-03-12 12:00:35+00:00)
Title: Canvas map is not immediately updated when layers are added or removed

To duplicate this, run the side-by-side example, open the console and run:
```javascript
canvasMap.getLayers().removeAt(0)
```
The WebGL and DOM maps update immediately, but the Canvas map does not.