Record SWR candidates for non SWR revalidation requests.

Revalidation requests would get tagged as SWR candidates when
the revalidation occurred causing skew in the histograms.

BUG=348877

Change-Id: I5d713b9d18513337d7ef9379effda8495ddcad4a
Reviewed-on: https://chromium-review.googlesource.com/c/1334662
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608056}
1 file changed