Fixup for test (was missing a closing tag).

Add another test for empty (but rendered) paths.

BUG=388676

Review URL: https://codereview.chromium.org/357943002

git-svn-id: svn://svn.chromium.org/blink/trunk@177059 bbb929c8-8fbe-4397-9dbb-9b2b20218538