GitLab

Refactor checking of URL whitelist to happen before analyzing the
downloaded file, in order to improve SB check latency for whitelisted
URLs. Certificate whitelist checks still happen towards the end of
processing since they rely on file analysis.

Bug: 526841
Change-Id: I59e228dea251ff1a03e319efccf1c2a8aec89bc3
Reviewed-on: https://chromium-review.googlesource.com/587329
Commit-Queue: Varun Khaneja <vakh@chromium.org>
Reviewed-by: Varun Khaneja <vakh@chromium.org>
Reviewed-by: Jialiu Lin <jialiul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491890}