Fix the test for creating servo objects in the SiteHost constructor.

The logic for creating a servo object was incorrectly handling
the simple case of a servo-based control file that was invoked
without command line arguments.

BUG=chromium-os:35898
TEST=run_remote_tests ... --servo platform_LongPressPower
TEST=run_remote_tests ... --args="servo_host=..." platform_LongPressPower
TEST=run_remote_tests ... platform_LongPressPower

Change-Id: I1a997ac3627c7f885485e0b3d620d9fa4725f2b1
Reviewed-on: https://gerrit.chromium.org/gerrit/36970
Reviewed-by: Craig Harrison <craigdh@chromium.org>
Commit-Ready: Richard Barnette <jrbarnette@chromium.org>
Tested-by: Richard Barnette <jrbarnette@chromium.org>
1 file changed