Allow webplot to use multiple protocols

The underlying remote touch device classes support multiple touch
protocols now, but webplot didn't have a way to pass that information
through.  This CL adds a new command line parameter --protocol which
allows the user to specify a protocol if they'd like.

BUG=none
TEST=manually tested

Change-Id: I25c7aaca7d2a40f92ff13c005cdfc2e1297145cc
Signed-off-by: Charlie Mooney <[email protected]>
Reviewed-on: https://chromium-review.googlesource.com/389551
Reviewed-by: Shyh-In Hwang <[email protected]>
1 file changed