handleEvent support

Closure-compiler doesn't support handleEvent. Is this going to get addressed?

If I add an eventlistener to an element inside a prototype function, e.g

``` js
SomePrototype.prototype.somefunc = function() {
el.addEventlistener("click", this);
};
```

will produce this error;

JSC_TYPE_MISMATCH: actual parameter 2 of Node.prototype.addEventListener does not match formal parameter

While it's completely legit JavaScript since years ago, as long as you have a handleEvent function e.g.

``` js
SomePrototype.prototype.handleEvent = function(e) {
if (e.type === "click") {}; // ...
};
```

I know you can use goog.events for doing things the old fashioned way, but for me that's not an option because
1. I don't support IE8 (since several years)
2. I don't want to use goog.events (e.g. be bound to one minifier for all time). Things change.
3. How handleEvent handles this references makes development so much smoother, since I don't need to use var self = this; everywhere.

I can fix this, but I don't know how the closure-compiler works (I'd have to learn, so it would take some time), so if anyone else can fix this, please do!