window.onerror signature is incorrect

[jbedard]

The window.onerror handler has a different method signature compared to all other *.on* event methods. When ZoneJS wraps window.onerror it changes the signature to be the standard handler signature instead of the window.onerror specific signature.

http://embed.plnkr.co/jiclV3raUVIhlz3uQ3IM/

[JiaLiPassion]

@jbedard , thank you for posting the issue, I will fix this one.