The histogram 'DataReductionProxy.ClientConfig.AuthExpiredSessionKey' is
present in Chromium source code but does not appear in histograms.xml. This
means that data is collected for the histogram but nothing useful is done
with it.

The histogram was defined in
components/data_reduction_proxy/core/browser/data_reduction_proxy_config_service_client.cc
at line 114.

https://cs.chromium.org/chromium/src/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_service_client.cc?l=114

It may have moved by the time you read this.

Please remove the histogram
'DataReductionProxy.ClientConfig.AuthExpiredSessionKey' from the source code.
If it was very recently added, it may be worth adding it to histograms.xml
instead, but probably not.

This bug was automatically assigned based on git blame information. If you
are not the correct assignee for this bug, please delete the histogram
anyway.