I was also confused by this.

This recent change may be related: https://chromium-review.googlesource.com/c/chromium/src/+/763168

 Issue 784036  has been merged into this issue.

It looks like Morten added this to a .gitignore in r516643.

I think it would be nicer if this file ended in .py, so that the *.pyc in src/.gitignore would catch it (and so that it would be more obvious what it is).  But I'll leave that up to dcheng.

I agree, and that was what I suggested in the review =)

I'll rename to py and undo the .gitignore change.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/02bad72f88ba3f356af8fd150ace6b70966ce1cb

commit 02bad72f88ba3f356af8fd150ace6b70966ce1cb
Author: Daniel Cheng <dcheng@chromium.org>
Date: Fri Nov 17 07:35:38 2017

Add .py suffix to audit-non-blink-usage

Python likes to cache the bytecode for imported modules in pyc files.
These files should be ignored by git. Since audit-non-blink-usage didn't
end in py, this created bytecode files that showed up as noise in git
status.

TBR=qyearsley@chromium.org

Bug:  784738 
Change-Id: I613bd3fdb6bfa4b2f8e4bea3ebfdc3cadef355d6
Reviewed-on: https://chromium-review.googlesource.com/776414
Commit-Queue: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517336}
[modify] https://crrev.com/02bad72f88ba3f356af8fd150ace6b70966ce1cb/third_party/WebKit/PRESUBMIT.py
[delete] https://crrev.com/f3946268c07321bc7f6c5cc06f399b2311e9ae04/third_party/WebKit/Tools/.gitignore
[modify] https://crrev.com/02bad72f88ba3f356af8fd150ace6b70966ce1cb/third_party/WebKit/Tools/Scripts/OWNERS
[rename] https://crrev.com/02bad72f88ba3f356af8fd150ace6b70966ce1cb/third_party/WebKit/Tools/Scripts/audit-non-blink-usage.py