about:safebrowsing should work regardless of how you got there

[alexwykoff]

• Did you search for similar issues before submitting this one?
  yes

• Describe the issue you encountered:
  when reviewing about:safebrowsing shows a blank page #8905 it was discovered that cmd+click opening a link to downloadme.org resulted in a blank page

• Platform (Win7, 8, 10? macOS? Linux distro?):
  os x

• Brave Version (revision SHA):
  0.15.3xx

• Steps to reproduce:

  1. visit http://alexwykoff.com/tests/testlinks.html
  2. cmd+click on the downloadme.org link

• Actual result:
  a blank page is displayed

• Expected result:
  All manner of display for about:safebrowsing should work. This includes but is not limited to:
  Clicking on the link
  Cmd+clicking on the link
  Directly typing into the urlbar
  Bookmarks

• Will the steps above reproduce in a fresh profile? If not what other info can be added?
  Yes

• Is this an issue in the currently released version?
  No

• Can this issue be consistently reproduced?
  Yes

• Extra QA steps:
  1.
  2.
  3.

• Screenshot if needed:

• Any related issues:

[diracdeltas]

checked that all of those methods worked except cmd-click/rightclick to open in new tab