What happened to the verbose "Dangerous" string?

Is this related to  Issue 651055 ?

Re: #1, verbose strings aren't launched yet, they're on for 50% of canary/dev right now. (And they're off by default as of https://codereview.chromium.org/2435493003/)

So I think this is indeed WAI, unless we want to change what's intended. The warning sticks with the hostname for the lifetime of the WebContents.

Hmm, this means if you're on a site that at some point shows an ad from a blacklisted site, and you click back on the warning to the "good" part of the site, you'll still see a dangerous indicator. That does seems misleading.

Oh, actually, I got a bit confused here.  Issue 651055  is intended: once you *click through* an interstitial, you get a dangerous icon on that hostname for the lifetime of the WebContents.

If you don't proceed through the interstitial, though, we should probably not continue to show the dangerous icon for the hostname.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/1ca09ca22c714b67a7d2be4070686065f47fd9d7

commit 1ca09ca22c714b67a7d2be4070686065f47fd9d7
Author: estark <estark@chromium.org>
Date: Tue Nov 01 04:04:12 2016

Remove Dangerous indicator after going back from interstitial

While showing a Safe Browsing interstitial, the top-level hostname for
the WebContents gets added to a "pending" whitelist set. Previously, we
were never removing URLs from that set, meaning that if you went Back
from an interstitial to a URL on the same hostname, the Dangerous
indicator persisted.

This CL fixes this bug by removing pending whitelist URLs when an
interstitial is dismissed with the Don't Proceed option.

BUG= 659709 
TEST=Visit http://testsafebrowsing.appspot.com, click first link. Observe that the icon in the omnibox is a red triangle. Click "Back to safety". Observe that the icon in the omnibox is an (i), not a red triangle.
TEST=Added browser test

Review-Url: https://codereview.chromium.org/2451623005
Cr-Commit-Position: refs/heads/master@{#428932}

[modify] https://crrev.com/1ca09ca22c714b67a7d2be4070686065f47fd9d7/chrome/browser/safe_browsing/safe_browsing_blocking_page.cc
[modify] https://crrev.com/1ca09ca22c714b67a7d2be4070686065f47fd9d7/chrome/browser/safe_browsing/safe_browsing_blocking_page_test.cc
[modify] https://crrev.com/1ca09ca22c714b67a7d2be4070686065f47fd9d7/chrome/browser/safe_browsing/safe_browsing_blocking_page_unittest.cc
[modify] https://crrev.com/1ca09ca22c714b67a7d2be4070686065f47fd9d7/chrome/browser/safe_browsing/ui_manager.cc
[modify] https://crrev.com/1ca09ca22c714b67a7d2be4070686065f47fd9d7/chrome/browser/safe_browsing/ui_manager.h
[modify] https://crrev.com/1ca09ca22c714b67a7d2be4070686065f47fd9d7/chrome/browser/safe_browsing/ui_manager_unittest.cc