Recently Google added this annoying pop up to the dev channel.
Someone answered here (Disable developer mode extensions pop up in Chrome) to edit the chrome.dll to get rid of the pop up.
However, the method described there does not seem to work anymore.
Additionally, it would be nice to have a batch script that patches chrome.dll should Google push a new update.
EDIT: Open to new hacks, since wOxxOm stopped maintaining his useful script (the manual method seems to be outdated as well)