commit 93401f7805e7311301aae8890b3b7c8da1d5f879
author Marijn Kruisselbrink <mek@chromium.org> Tue Nov 22 19:10:03 2016
committer Marijn Kruisselbrink <mek@chromium.org> Tue Nov 22 19:14:52 2016
tree 641cf551367a5c11e110b8a96271c8f2a6c40098
parent 64856f1d4d8804f8db7ff550afbcbc51bd65efbb

Add a use counter for Link rel=serviceworker headers.

Even though these link headers aren't processed in blink, this is still
the most sensible place for a use counter for these.

BUG=582310,667086

Review-Url: https://codereview.chromium.org/2513183002
Cr-Commit-Position: refs/heads/master@{#433444}
(cherry picked from commit 9c76cfaf64b27534abe2663b2a1768737d64d4f9)

Review URL: https://codereview.chromium.org/2521153004 .

Cr-Commit-Position: refs/branch-heads/2924@{#62}
Cr-Branched-From: 3a87aecc31cd1ffe751dd72c04e5a96a1fc8108a-refs/heads/master@{#433059}