Revert "AW: Enable Safe Browsing by default"

This reverts commit 0b4a380b719faf9ecb53d52dc7e26262a164bcc4.

Note: this revert only lands on the M65 branch, and does not affect trunk.

Reason for revert: We want to wait one more cycle before launching in
stable.

Original change's description:
> AW: Enable Safe Browsing by default
>
> This changes the logic to turn Safe Browsing on by default instead of
> off by default. "On by default" means that we assume applications opt in
> to Safe Browsing.
>
> Details for precisely when WebView Safe Browsing is enabled can be found
> here: https://goo.gl/zXkbFg
>
> This also removes WEBVIEW_ENABLE_SAFEBROWSING_SUPPORT from integration
> tests, since the flag is now redundant.
>
> Bug: 799317
> Test: Manual - tested with and without --webview-disable-safebrowsing-support
> Test: See SuperSafeBrowsing*.apk in https://sites.google.com/a/google.com/clank/engineering/android-webview/zzarchive/webview-manual-testing
> Change-Id: I96f88ff979b7bcbec9608a3d79f44575f26942d3
> Reviewed-on: https://chromium-review.googlesource.com/850825
> Reviewed-by: Changwan Ryu <changwan@chromium.org>
> Commit-Queue: Nate Fischer <ntfschr@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#527393}

TBR=changwan@chromium.org,ntfschr@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 807130
Change-Id: I7b818d1a7948135064faa26f86b74b1d16ed483b
Reviewed-on: https://chromium-review.googlesource.com/932947
Reviewed-by: Changwan Ryu <changwan@chromium.org>
Cr-Commit-Position: refs/branch-heads/3325@{#576}
Cr-Branched-From: bc084a8b5afa3744a74927344e304c02ae54189f-refs/heads/master@{#530369}
2 files changed