tree 4742d9823271cdbf16befb16ebc585ba6048dc34
parent 12525aebc981358ee073b236b95c0a1c5b980fdd
author Harry Terkelsen <het@google.com> 1464902709 -0700
committer William Hesse <whesse@google.com> 1464978399 +0200

use const Link so that empty Link is always identical

BUG=
R=sigmund@google.com

Review URL: https://codereview.chromium.org/2033873002 .