Fix assumption that 'graph' results field is non-null.

Crosperf dies handling the results of the graphics test,
because the 'graph' field in the results is null and crosperf
was expecting it to be non-null.  This fixes that problem.

BUG=chromium:424623
TEST=Ran graphics test with this fix and it no longer crashes.

Change-Id:I6764e7c38db5d1913109948d5f4798bdf5d6fb7c
Reviewed-on: https://chrome-internal-review.googlesource.com/180212
Reviewed-by: Luis Lozano <llozano@chromium.org>
Commit-Queue: Caroline Tice <cmtice@google.com>
Tested-by: Caroline Tice <cmtice@google.com>
1 file changed