Revert of Trigger Dangerous indicator for unsafe subresources (patchset #4 id:60001 of https://codereview.chromium.org/2444383007/ )

Reason for revert:
Breaks MSan tests:

First breaking build:
https://build.chromium.org/p/chromium.memory.full/builders/Linux%20MSan%20Tests/builds/2755

Original issue's description:
> Trigger Dangerous indicator for unsafe subresources
>
> Previously, the Dangerous indicator was not firing for subresources
> flagged by Safe Browsing as unsafe. This is because marking a
> subresource as unsafe was not triggering an omnibox update. We want to
> trigger an omnibox update whenever a URL is marked as
> whitelisted (either pending, meaning that an interstitial is showing, or
> whitelisted, meaning that an interstitial has been clicked through) in
> SafeBrowsingUIManager.
>
> To do so, this CL renames WebContentsImpl::DidChangeVisibleSSLState() to
> DidChangeVisibleSecurityState() (since it's no longer just SSL
> information that can affect the omnibox security UI) and moves it to
> WebContents so that it can be called from SafeBrowsingUIManager.
>
> BUG=659713
> CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_site_isolation
>
> Committed: https://crrev.com/8bb181295c47ba4d74a626f809a1a27423544f2f
> Cr-Commit-Position: refs/heads/master@{#428223}

TBR=nparker@chromium.org,jam@chromium.org,estark@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=659713

Review-Url: https://codereview.chromium.org/2461093002
Cr-Commit-Position: refs/heads/master@{#428520}
18 files changed