IPNS link fails to load via "Load using IPFS" badge/icon in URL bar

[stephendonner]

Description

IPNS link fails to load via "Load using IPFS" badge/icon in URL bar

Found while testing #16115

Steps to Reproduce

1. new profile
2. launch Brave
3. load ipns://brantly.eth
4. click on Use a local node
5. click on the Open using IPFS badge/icon

Actual result:

ipns://brantly.eth//brantly.eth (note the double //) gets loaded in the URL bar, with the error message ipfs resolve -r /ipns/brantly.eth/brantly.eth: no link named "brantly.eth" under bafybeihqoo7bq7uoaybzpfwegks33vw2h5adyl4t7joz3pofkr6h7yhdxq printed out

Expected result:

It should load the resource using IPFS

Reproduces how often:

100%

Brave version (brave://version info)

Brave	1.27.39 Chromium: 91.0.4472.77 (Official Build) nightly (x86_64)
Revision	1cecd5c8a856bc2a5adda436e7b84d8d21b339b6-refs/branch-heads/4472@{#1246}
OS	macOS Version 11.4 (Build 20F71)

/cc @lidel @spylogsster

[stephendonner]

Verified PASSED using the inline testplan with build

Brave	1.27.62 Chromium: 91.0.4472.101 (Official Build) nightly (x86_64)
Revision	af52a90bf87030dd1523486a1cd3ae25c5d76c9b-refs/branch-heads/4472@{#1462}
OS	macOS Version 11.4 (Build 20F71)

Steps:

1. new profile
2. launched Brave
3. loaded ipns://brantly.eth
4. clicked on Use a local node
5. confirmed after install finished there was no Open using IPFS badge in the URL bar, since it's already using it

example	example