This bug is only marked as "important", which means unless somebody really cares to fix it out of good will, this won't get fixed.
Do you see a valid reason to escalate its severity at least to "serious", so it becomes release critical? Maybe one could come up with some reason like "violates the spirit of the DSC", but I'm not sure that can be formulated in a bullet-proof way. After all, snooping on people doesn't seem to be a big deal anymore, not even for FLOSS, especiallly if the big G is involved.
Well, up to this point I would have guessed that this kind of data collection is only in Chrome, but not in Chromium, at least not enabled by default on Debian, considering the story around the creation of Iceweasel back then.
I would argue that, at least for software in the Debian repositories that is seeing any significant amount of use from the userbase, such an intimate kind of data collection is generally not expected to happen out of the blue, but expected to go along with explicit-ish information (for example, in the documentation) to enable users to make an informed decision on whether or not to willingly accept this kind data handling. This kind of documentation is necessary in order to be in harmony with the spirit of free software, because without this knowledge, users wouldn't be able to have control over their computers, the software that they're running, and the data that this software will be processing. What is at the core of the free software spirit, if not to have a greater understanding of what happens with and to data?
As it stands today, I would argue, the data collection behavior of Chromium may be surprising to many Debian users, and in any case is so intimate that it should not take place under any unsuspecting user's radar, who might otherwise not agree with the practice. Obviously, once this intimate user data gets transmitted to a third party's server, there will be no turning back. To assure that all of the the intentions of free software will be met going into a future of Big Data and Internet of Things, there needs to be be a warning system which, at an appropriate moment, provides informational notes about any package's intimate data collection practices, providing an overview over their extent and briefly touching potential ramifications, to ensures that users are able to make informed decisions /before/ data that could be considered intimate irreversibly gets transmitted to other partys' servers.
Additionally, It should be considered to work against having intimate data collection behavior be the default for widely-used software packages that touch wide areas of everyday life. Though, really, informing users when and where they have to stop trusting their software is more important.
Anyone, feel free to iterate on the above...