Remove --safebrowsing-disable-auto-update switch.

The switch was not used for PVer4 so there should be no effect of
removing it.

Bug: 74848
Change-Id: Ia9c0bc55f56acde7fb4f5112ff6b0f94de4fcfe2

TBR=sky
(minor changes under chrome/test)

Change-Id: Ia9c0bc55f56acde7fb4f5112ff6b0f94de4fcfe2
Reviewed-on: https://chromium-review.googlesource.com/777789
Reviewed-by: Varun Khaneja <vakh@chromium.org>
Reviewed-by: Nate Fischer <ntfschr@chromium.org>
Reviewed-by: Jialiu Lin <jialiul@chromium.org>
Commit-Queue: Varun Khaneja <vakh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#518507}
8 files changed