What are CrashpadMetrics.pma ~ xxx.TMP in AppData Local Google Chrome User Data

I have hundreds of files like CrashpadMetrics.pma ~ xxx.TMP, some created a year ago in the folder AppData Local Google Chrome User Data

There is also a principal CrashpadMetrics-active.pma.

What are these files and why do not they delete them from time to time?

Can I erase all the old ones CrashpadMetrics.pma ~ xxx.TMP as there is a lot of room.