http://research.google.com/pubs/archive/34913.pdf (2009)
http://blog.chromium.org/2010/05/sneak-peek-at-native-client... (2010)
No mention of PNaCL anywhere. Eventually they did change their public messaging away from x86 sandbox and towards PNaCl, though not before causing lots of external confusion and fear. And even then, with the time it took to get PNaCl released, some of the external confusion persisted.
The earlier poster does indeed seem to have misunderstood the history, but it's easy to see where such misunderstanding may come from.