Then I will. It's a conspiracy theory, worthy of all the mocking typically associated with such a thing.
Anyone who's been watching Google long enough, closely enough, knows how out of character this would be. Such efforts, not to mention the purported motivation, is not in their nature.
Google employees start hundreds (thousands?) of new projects every year with little coordination. Some of these end up becoming big, official things, and we end up with Gmail. They throw stuff at the wall and see what sticks.
There might be some group inside Google thinking along the lines this guy is. I doubt it, but it's possible. It might even be the native client guys. What there isn't, is a massive internal conspiracy crossing every product team up and down the chain of command, aimed at making Google the sole arbiter of what can run on your device.
Even if the executives wanted it to happen, it couldn't. How do I know this?
Because Google is full of hackers who would instantly revolt. They've had enough problems with things like their real name policy and the handful of places they've had to acquiesce to DRM.
A coordinated effort to make Google into The One True Gatekeeper into your electronic life on a scale unmatched even by 1990s Microsoft? I await the flying pigs.