It's troublesome that we have to type (this) in several places
but I don't see a away around it yet and it does not add to the line
of code count at all to have to do this; it's just not aesthetic to me.

If this idea is okay, I can make all the similar changes
in the Mips Subzero port.

BUG=

Review URL: https://codereview.chromium.org/1661233002 .

Patch from Reed Kotler <rkotlerimgtec@gmail.com>.