Fails to show cert error on pinning test

[btlechowski]

Steps to Reproduce

1. Go to https://pinning-test.badssl.com/

Actual result:

The site was opened.
Cert error was not shown
Page is shown as secure

Expected result:

Similar to Chrome:

Reproduces how often:

always

Brave version (chrome://version info)

Brave	0.55.5 Chromium: 70.0.3538.16 (Official Build) dev (64-bit)
Revision	16ed95b41bb05e565b11fb66ac33c660b721f778-refs/branch-heads/3538@{#306}
OS	Windows 7

Reproducible on current release:

yes, same version

Found when testing #767.
cc @diracdeltas @jumde

[jumde]

See here: #767 (comment)

[btlechowski]

@jumde can I then close this one as won't fix?

[btlechowski]

This is expected behavior. Closing.