GitLab

Add a Safe Browsing Interstitial Page for Trick to Bill.

Add a Trick to Bill enum to SBThreatType and
SBInterstitialReason.

Overview CL:
https://chromium-review.googlesource.com/c/chromium/src/+/1148598

Testing:
- SafeBrowsingBlockingPageTest.TrickToBillPage unit test

Bug: 867518
Change-Id: I0f5c342f419c2f326c7f25fa7e965d47ed242bbd
Reviewed-on: https://chromium-review.googlesource.com/1150917Reviewed-by: Varun Khaneja <vakh@chromium.org>
Reviewed-by: Mustafa Emre Acer <meacer@chromium.org>
Commit-Queue: Sarah Chan <spqchan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#579442}