Chrome Version: 63.0.3239.108
OS: Ubuntu 14.04

What steps will reproduce the problem?
(1) Launch Chrome
(2) pgrep -c cat 
(3) chrome://restart (Or restart via about:flags or the update restart prompt)
(4) pgrep -c cat
(5) Repeat steps (3) and (4) until bored.

What is the expected result?
The number of cat processes should not increase over time.

What happens instead?
Every time Chrome restarts, the number of cat processes increases by two.

This is caused by the fix for  issue #376567 . When we restart the browser, Chrome makes a new child process based on its previous argv just before exitting:
https://cs.chromium.org/chromium/src/chrome/browser/browser_shutdown.cc?l=232

However, the wrapper script uses exec -a, so Chrome thinks its argv[0] is the wrapper rather than the actual binary.
https://cs.chromium.org/chromium/src/chrome/installer/linux/common/wrapper?rcl=30a800ab092d8a2c24aee9e9ed73e55352ad1970&l=49

This causes it to run the wrapper script again on restart, which dutifully chains another cat in front of each stdout and stderr. As the browser self-restarts, stdout and stderr get a longer and longer cat pipeline, until it is closed normally for whatever reason.

One possibility is to drop the exec -a bit so self-restarts don't re-run the wrapper. The consequences I can see there are:
1. On update, we'd maybe want to re-run the wrapper, in case there's anything new in there??
2. The browser process will look different in ps... if we care.

Another is to remove the cats and instead fix  issue #376567  by having the browser process manage the stdout/stderr pipes and remember to undo it before restarting. But sounds like a lot of work.

Another is we could maybe detect if stdout/stderr is already a pipe (not sure how one does that in shell short of /proc...) and not inject a cat in that case? Dunno if there are any cases where that would be bad.

mdempsky doesn't seem to work on Chrome anymore, so CCing thomasanderson for Linux stuff and folks from the original bug who still work in the vague vicinity or may find this entertaining.

(Note there appears to be a second copy of the wrapper script now, so any changes there should be mirrored:
https://cs.chromium.org/chromium/src/extensions/shell/installer/linux/common/wrapper?rcl=30a800ab092d8a2c24aee9e9ed73e55352ad1970&l=32 )

Please use labels and text to provide additional information.

For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.