Remove dashing from gpu veto

Remove dashing from gpu veto

With new veto our new veto test results look like the following:
TP: true positive (picked to use gpu and gpu was faster)
I: inderminate, the raster time is withing 5% of gpu time

        TP  FP  TN  FN  I

old     21  9   15  12  3
new     29  12  11  6   3

There are three skps that tend to move from TN -> FP, however
the absolute difference in their run times are not huge between
them. The largest being desk_booking which is about 7.1 raster
and 8.8 gpu. The other two skps are desk_yahooanswers and
desk_linkedin

BUG=skia:
R=bsalomon@google.com, robertphillips@google.com

Author: egdaniel@google.com

Review URL: https://codereview.chromium.org/334053005