Test 67.js was expecting us to only parse out one server-timing-metric,
and ignore "junk" after. But, according to the spec, we are only to
ignore junk up to the point where we see either (1) another metric, or
(2) a server-timing-param. The header sent has a param (dur=123.4), and
we were parsing that correctly.
Test 68.js was similar, but this time there was another metric (comma-
separated) in the header, which we correctly parsed. The test expected
us to ignore it as "junk".
MozReview-Commit-ID: 9nBhQ7nAdhX
66645701d9