Content shell does not display correct user agent version in android as well as linux (right now content_shell displays chrome/19.77.34.5).
This seems to be deliberate from src/content/content_shell.gypi
'variables': {
'content_shell_product_name': 'Content Shell',
# The "19" is so that sites that sniff for version think that this is
# something reasonably current; the "77.34.5" is a hint that this isn't a
# standard Chrome.
'content_shell_version': '**19.77.34.5**',
You can always use chromium_testshell which will give correct version (which is currently Chrome/35.0.1879.0).