UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.108 Safari/537.36

Steps to reproduce the problem:
1. Build gn (tools/gn/bootstrap.py)
2. see it
3. 

What is the expected behavior?
build gn,  after build callfiles and after build chromium canary

What went wrong?
with this commit 

https://chromium.googlesource.com/chromium/src/+/2b31dbb2b212be2402e583d0ce53d30fb7892a5c%5E%21/#F3

i got this

without this commit i got MANY orphan files (it fails because it cant find some files)

examples
base/lazy_instance.cc
base/metrics/field_trial.cc

Did this work before? Yes 65.0.322.3

Chrome version: 63.0.3239.108  Channel: canary
OS Version: 65.0.3224.0
Flash Version: 

if you try to use dev's channel  base/ folder 
appears work fine