See https://w3c.github.io/server-timing/#the-server-timing-header-field
Parameters for a metric in the Server-Timing header are now be named.
Old:
Server-Timing: db = 123; "database access"

New:
Server-Timing: db; dur=123; desc="database access"

Bug: 702760
Change-Id: Ic544448898a72f9762ba054b69e68f63bb5c76b0
Reviewed-on: https://chromium-review.googlesource.com/741465
Commit-Queue: Yoav Weiss <[email protected]>
Reviewed-by: Mike West <[email protected]>
Reviewed-by: Yoav Weiss <[email protected]>
Cr-Commit-Position: refs/heads/master@{#518905}