Add "Don't ask me again" pref to 404 Wayback machine infobar

[rebron]

Description

For those users who don't want to see the 404 Wayback machine notification, provide a way to disable the notification without having to go to brave://settings/braveHelpTips.

Setting "Don't ask me again" should toggle 'Show Wayback Machine prompt on 404 pages' setting.

Steps to Reproduce

1. Visit https://www.brave.com/bo
2. Notice 404 infobar prompt.
3. Need to provide a way to not show prompt again in context.

Designs:

[placeholder]

[PierBover]

Please yes... this Wayback Machine integration is super annoying.

[yippie]

Even worse, it seems to show up when a single resource used by the page 404s

Go to https://mdcoverage.secure.force.com/docs/metadata-coverage

notice the page loads completely and correctly but you STILL GET THE BANNER.

[rebron]

@yippie Via devtools console, it looks like something did 404 https://mdcoverage.secure.force.com/docs/metadata-coverage/48
We'll look into not showing the prompt if the main resource is loading properly.

[bsclifton]

@yippie that page is trying to redirect to https://mdcoverage.secure.force.com/docs/metadata-coverage/48 which network shows a 404 received. Brave has no way to tell if the content actually loaded, only what HTTP status code was returned. This feature can be turned off on brave://settings/braveHelpTips

Just turn it off there and you'll never see it again 😄

[yippie]

Oh thank you! turned it off because the Wayback has proven completely worthless for me. I have never encountered a situation where it would actually work. I have only ever gotten it in two ways:

• A resource, but not the main page, threw a 404 <- this was super annoying
• I was trying to access an authenticated page after my session expired. Wayback would obviously not help there.

[bsclifton]

@yippie you're welcome 😄

cc: @rebron for feedback!

[kjozwiak]

https://www.reddit.com/r/brave_browser/comments/g3y1iw/wayback_machine_in_private_mode_with_tor/fnvorf9?utm_source=share&utm_medium=web2x

Another example of users having a hard time finding the setting that disables this feature.

[stephendonner]

Verified PASSED using the testplan from brave/brave-core#9030 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)

Scenario 1: Don't ask me again button

Steps:

1. new profile
2. loaded brave://settings/braveHelpTips
3. confirmed Show Wayback Machine prompt on 404 pages was toggled by default to On
4. loaded brave.com/bad-link and confirmed I got the Wayback Machine prompt
5. clicked the Don't ask me again button
6. confirmed the pref toggled back to Off
7. reloaded brave.com/bad-link and confirmed I no longer got the Wayback Machine infobar

example	example	example	example

Scenario 2: Check for Saved Version button

Steps:

1. new profile
2. loaded brave://settings/braveHelpTips
3. confirmed Show Wayback Machine prompt on 404 pages was toggled by default to On
4. loaded brave.com/bad-link and confirmed I got the Wayback Machine prompt
5. clicked on Check for saved version
6. confirmed it checked for a saved version and printed out Sorry, there is no saved version available in the infobar

example	example	example

[rebron]

Thanks @rahulsnkr nice job!