Study BraveLocalhostAccessPermissionStudy

[github-actions]

production: #673

[kjozwiak]

LGTM 👍 Merging into main so QA can run through the above on staging before uplifting #673 into production.

[stephendonner]

Verification IN-PROGRESS using

Brave	1.55.15 Chromium: 115.0.5790.40 (Official Build) nightly (64-bit)
Revision	071c9ddea889c3c7887daf4eac13fed72d4fff62-refs/branch-heads/5790@{#979}
OS	Windows 10 Version 22H2 (Build 19045.3086)

Steps:

1. installed 1.55.15
2. launched Brave using --enable-logging=stderr --variations-server-url=https://variations.bravesoftware.com/seed
3. opened brave://version
4. confirmed no BraveLocalhostAccessPermissionStudy key or value yet
5. restarted Brave
6. reopened brave://version
7. confirmed BraveLocalhostAccessPermissionStudy:Enabled was set
8. opened brave://flags
9. also confirmed Default value for the same
10. loaded https://shivankaul.com/brave/localhost/subresource.html
11. followed the instructions, and:

• python3 -m http.server 8000
• drop a logo.png into the above directory'

12. shift+reload https://shivankaul.com/brave/localhost/subresource.html
13. ...

example	example	example

[kjozwiak]

Verification PASSED on Win 11 x64 using the following build(s):

Nightly - BraveLocalhostAccessPermissionStudy enabled

Brave | 1.55.17 Chromium: 115.0.5790.40 (Official Build) nightly (64-bit)
-- | --
Revision | 071c9ddea889c3c7887daf4eac13fed72d4fff62-refs/branch-heads/5790@{#979}
OS | Windows 11 Version 22H2 (Build 22621.1848)

• downloaded/installed 1.55.17 Chromium: 115.0.5790.40 and started Brave using the following
  • brave.exe --enable-logging=stderr --variations-server-url=https://variations.bravesoftware.com/seed
• ensured that BraveLocalhostAccessPermissionStudy isn't visible under brave://version

• restarted Brave using brave.exe --enable-logging=stderr --variations-server-url=https://variations.bravesoftware.com/seed
• ensured that BraveLocalhostAccessPermissionStudy:Enabled via brave://version
• added shivankaul.com into localhost-permission-allow-list.txt as per Use component update list for localhost permission prompting brave-core#18354 (comment)
• launched a localhost server via python.exe -m http.server 8000
• loaded https://shivankaul.com/brave/localhost/subresource.html and ensured that the Localhost permission modal appeared
• ensured that the shields panel was displaying 0 as per Add default filter provider manager brave-core#18876 (comment)

Example	Example	Example	Example

BETA - BraveLocalhostAccessPermissionStudy NOT being listed/added

Brave | 1.54.81 Chromium: 115.0.5790.40 (Official Build) beta (64-bit)
-- | --
Revision | 071c9ddea889c3c7887daf4eac13fed72d4fff62-refs/branch-heads/5790@{#979}
OS | Windows 11 Version 22H2 (Build 22621.1848)

• downloaded/installed 1.54.81 Chromium: 115.0.5790.40 and started Brave using the following
  • brave.exe --enable-logging=stderr --variations-server-url=https://variations.bravesoftware.com/seed
• ensured that BraveLocalhostAccessPermissionStudy isn't visible under brave://version

• restarted Brave using brave.exe --enable-logging=stderr --variations-server-url=https://variations.bravesoftware.com/seed
• ensured that BraveLocalhostAccessPermissionStudy isn't visible under brave://version

Release - BraveLocalhostAccessPermissionStudy NOT being listed/added

Brave | 1.52.126 Chromium: 114.0.5735.133 (Official Build) (64-bit)
-- | --
Revision | fbfa2ce68d01b2201d8c667c2e73f648a61c4f4a-refs/branch-heads/5735@{#1270}
OS | Windows 11 Version 22H2 (Build 22621.1848)

• downloaded/installed 1.52.126 Chromium: 114.0.5735.133 and started Brave using the following
  • brave.exe --enable-logging=stderr --variations-server-url=https://variations.bravesoftware.com/seed
• ensured that BraveLocalhostAccessPermissionStudy isn't visible under brave://version

• restarted Brave using brave.exe --enable-logging=stderr --variations-server-url=https://variations.bravesoftware.com/seed
• ensured that BraveLocalhostAccessPermissionStudy isn't visible under brave://version

[kjozwiak]

Verification PASSED on Pixel 6 running Android 14 using the following STR/Cases:

Went through the STR/Cases mentioned via brave/brave-core#10408 (comment) and ensured that Brave was using https://variations.bravesoftware.com/seed which is the staging URL.

Nightly - BraveLocalhostAccessPermissionStudy enabled

Brave | 1.55.16 Chromium: 115.0.5790.40 (Official Build) canary (64-bit)
--- | ---
Revision | 071c9ddea889c3c7887daf4eac13fed72d4fff62-refs/branch-heads/5790@{#979}
OS | Android 14; Build/UPB3.230519.014; 34; REL

• downloaded/installed 1.54.82 Chromium: 115.0.5790.40 and started Brave
• ensured that BraveLocalhostAccessPermissionStudy:Enabled is visible under brave://version

• restarted Brave and ensured that BraveLocalhostAccessPermissionStudy:Enabled via brave://version

BETA - BraveLocalhostAccessPermissionStudy NOT being listed/added

Brave | 1.54.82 Chromium: 115.0.5790.40 (Official Build) beta (64-bit)
--- | ---
Revision	071c9ddea889c3c7887daf4eac13fed72d4fff62-refs/branch-heads/5790@{#979}
OS	Android 14; Build/UPB3.230519.014; 34; REL

• downloaded/installed 1.54.82 Chromium: 115.0.5790.40 and started Brave
• ensured that BraveLocalhostAccessPermissionStudy isn't visible under brave://version

• restarted Brave and ensured that BraveLocalhostAccessPermissionStudy isn't visible under brave://version

Release - BraveLocalhostAccessPermissionStudy NOT being listed/added

Brave | 1.52.126 Chromium: 114.0.5735.133 (Official Build) (32-bit)
--- | ---
Revision | fbfa2ce68d01b2201d8c667c2e73f648a61c4f4a-refs/branch-heads/5735@{#1270}
OS | Android 14; Build/UPB3.230519.014; 34; REL

• downloaded/installed 1.52.126 Chromium: 114.0.5735.133 and started Brave
• ensured that BraveLocalhostAccessPermissionStudy isn't visible under brave://version

• restarted Brave and ensured that BraveLocalhostAccessPermissionStudy isn't visible under brave://version