about:extension doesn't contain Favicons of any of the installed extensions

[srirambv]

Did you search for similar issues before submitting this one?
Yes

Describe the issue you encountered:
about:extension doesn't contain Favicons of any of the installed extensions

Expected behavior:
Should show the favicons for installed extensions

• Platform (Win7, 8, 10? macOS? Linux distro?):
  Windows 10 x64

• Brave Version:
  0.13.0 Preview 4

• Steps to reproduce:

  1. Enable all extensions on 0.13.0
  2. Open about:extensions, none of them have the favicons

• Screenshot if needed:
  

• Any related issues:

[cezaraugusto]

This is related to how we collect icon files, which ideally we should collect via chrome-extension:// instead of file://. #6290 didn't address the issue the right way.

Stepping back in favor of @bbondy comment. Will happily assist anything needed.

[bbondy]

So I tried a lot of different things, Chrome encodes to data:// urls, which we could calculate on extension load. We might possibly be able to get to it via chrome extension management api once we implement as well. For now I ended up just going to simply adding file://* without removing the others.

[luixxiul]

Test plan:

Open about:extensions
Make sure that extensions have their icons