tree cc2b9691c8d3c4007eca876fb3e5808e5476ef5a
parent d943b1323f2cf5d80eec463f08adb35859b3c5c2
author Haibo Huang <hhb@google.com> 1573255131 -0800
committer Haibo Huang <hhb@google.com> 1573358837 +0000

Fix build with new googletest

The new googletest requires prefix to be non-empty.

Exempt-From-Owner-Approval: Fix test
Change-Id: I69505920cc2c12abd8214210918a7bbfea431ea7