The biggest piece here is system_profile.pb.  I wonder if Cronet should be using this when we generate netlogs?  I think it might be quite useful to have more information about the device.

Fixed by https://chromium-review.googlesource.com/c/chromium/src/+/1256122 that allows to optionally remove //components/metrics dependency to reduce binary size.

Add disable_histogram_support gn argument. If set to "true", then GetHistogramDeltas() support is disabled, and Cronet size is reduced by about 200 kilobytes.