Changed call to TestError to error.TestError

Needed to add the "error." qualifier to TestError.

BUG=chromium:266968
TEST=run platform_CorruptRootfs.contorl$ on system booted from a thumb drive

Change-Id: Ibd325f77cfa4473f862f005d52843c65c6d34f0d
Reviewed-on: https://gerrit.chromium.org/gerrit/64234
Commit-Queue: Paul Taysom <taysom@chromium.org>
Reviewed-by: Paul Taysom <taysom@chromium.org>
Tested-by: Paul Taysom <taysom@chromium.org>
1 file changed