Version: 55.0.2878.0
OS: ChromeOS

What steps will reproduce the problem?
(1) Sign-in to ChromeOS.
(2) Un-install a pre-installed app.
(3) Sign-out.
(4) Sign back in again.

What is the expected output?

Expect no log output relating to the uninstalled app.

What do you see instead?

A run of messages:
"External extension with id <id> has been uninstalled by the user" is logged for each pre-installed app that was un-installed by the user.

In my current log file this is list of un-installed apps is logged seven times.

There are also a few messages of the form:
"Extension with id <id> from sync was uninstalled as external extension"
logged about 90 seconds after startup.

Finally, there is a second run of messages:
"Attempted uninstallation of non-existent extension with id: <id>"
logged, also about 90 seconds after startup.