Chromium on RPI2

[bob prohaska]

In playing with www/chromium on an RPI2 running -current I've gotten far 
enough to see the error

/usr/local/bin/python2.7: can't open file './build/linux/unbundle/replace_gn_files.py': [Errno 2] No such file or directory

I realize that www/chromium isn't expected to work on ARM, but this error
does not seem ARM-specific.

If anyone can suggest a workaround I'd be pleased to try it. A brute-force
search for that filename found nothing.

Thanks for reading,

bob prohaska