the scroll direction should match the system touch scroll direction.  i.e. open a webpage with long content and compare the scrolling behavior there with hterm.

when i tested on my pixel, that's what i got.  do you not see that ?

Nope, crosh is scrolling the opposite direction from any other content. This is ToT from yesterday on pyro.

i might have compared touchpad to touchscreen when i did the pixel testing.  at any rate, testing on a cyan matches your report, so i'll invert it.

don't have a touchscreen to check Windows/macOS behavior.

The following revision refers to this bug:
  https://chromium.googlesource.com/apps/libapps/+/6aec411b14277693e99dcd490eb185b9052348c7

commit 6aec411b14277693e99dcd490eb185b9052348c7
Author: Mike Frysinger <vapier@chromium.org>
Date: Fri Jun 16 18:31:23 2017

hterm: invert touchscreen scrolling

This makes the scrolling direction match scrolling other Chrome pages
via touchscreen rather than the touchpad.

BUG= chromium:733309 

Change-Id: Ifc23204c4f70f723adeb7e189f1c8cef6191a62a
Reviewed-on: https://chromium-review.googlesource.com/537963
Reviewed-by: Brandon Gilmore <varz@google.com>
Tested-by: Mike Frysinger <vapier@chromium.org>

[modify] https://crrev.com/6aec411b14277693e99dcd490eb185b9052348c7/hterm/js/hterm_scrollport.js

this will be fixed with hterm-1.66+ and nassh-0.8.36.6+