REGRESSION (3.1.1-TOT): Arrow keys are sticky in Google Maps street view

Google Maps street view behaves as if a key, once pressed, remains down and repeats.

Steps to reproduce:
1. Open the URL.
2. Click inside the street view to focus it.
3. Press the up arrow key.

Expected:
The street view to advance one step.

Actual:
The street view advances repeatedly.

<rdar://problem/5909513>

[Anders Carlsson]

Committed revision 32962.