Support upcoming scriptletGlobals change in upstream uBO

[antonok-edm]

Resolves brave/brave-browser#35679

Submitter Checklist:

• I confirm that no security/privacy review is needed and no other type of reviews are needed, or that I have requested them
• There is a ticket for my issue
• Used Github auto-closing keywords in the PR description above
• Wrote a good PR/commit description
• Squashed any review feedback or "fixup" commits before merge, so that history is a record of what happened in the repo, not your PR
• Added appropriate labels (QA/Yes or QA/No; release-notes/include or release-notes/exclude; OS/...) to the associated issue
• Checked the PR locally:
  • npm run test -- brave_browser_tests, npm run test -- brave_unit_tests wiki
  • npm run lint, npm run presubmit wiki, npm run gn_check, npm run tslint
• Ran git rebase master (if needed)

Reviewer Checklist:

• A security review is not needed, or a link to one is included in the PR description
• New files have MPL-2.0 license header
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
• Changes in component dependencies are properly reflected in gn
• Code follows the style guide
• Test plan is specified in PR before merging

After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on
• All relevant documentation has been updated, for instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protections
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Web-Compatibility-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

Visit https://youtube.com and confirm adblock is still working correctly

[stephendonner]

Verification PASSED using

Brave | 1.64.41 Chromium: 121.0.6167.139 (Official Build) nightly (64-bit)
-- | --
Revision | 1c56846eb16cec835298c09cd75ec45fc425507b
OS | Windows 10 Version 22H2 (Build 19045.3996)

YouTube.com homepage - PASSED

Steps:

1. new profile
2. load youtube.com
3. stay logged out
4. click around
5. return to youtube.com

Confirmed no visible ads when returning to youtube.com after navigating away

1.64.41	1.62.156

No pre-roll/skip-ad buttons (screencast) - PASSED

2024-02-05_16h12_16.mp4

Direct navigations (from URL) - PASSED

loaded https://www.youtube.com/watch?v=uXrvgHwVKEo

Confirmed no pre-roll ads, or ads in-between seek positions

1.64.41	1.62.156

Searches - PASSED

Steps:

• searched for lexus 500h f sport performance (https://www.youtube.com/results?search_query=lexus+500h+f+sport+performance)
• clicked on search results

Confirmed no ads in or around the search results

example	example

Live - PASSED

Steps:

• clicked on Live (https://www.youtube.com/channel/UC4R8DWoMoI7CAwX8_LjQHig)
• clicked on LIVE - DR DISRESPECT - TARKOV - LEVEL 9 IN THE GUTTER - https://www.youtube.com/watch?v=NX2vRrjKevk

Confirmed no pre-roll ads

Movies & TV - PASSED

Steps:

• clicked on Movies & TV
• clicked on Brewster's Millions - https://www.youtube.com/watch?v=Ous_BwnCvUw
• clicked Allow to install Widevine

Confirmed no pre-roll ads, or ads in-between seek positions

example	example

Toggle Shields off (and then back on, again) - PASSED

Steps:

1. loaded youtube.com
2. disabled Shields by setting them to Down
3. clicked on random videos, from different locations
4. confirmed I saw various types of ads (pre-roll, interstitial, and non-video static ads on the homepage and search results)
5. renabled Shields by setting them to Up

Confirmed no further ads seen after Shields were Up

Shields OFF	...	...	...	Shields ON	...

[kjozwiak]

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

Brave | 1.64.40 Chromium: 121.0.6167.139 (Official Build) nightly (64-bit)
-- | --
Revision | e6cf92e9be4d20334958003689451d8763fa199e
OS | Windows 11 Version 23H2 (Build 22631.3085)

Been using YT for a few hours throughout the day and watched a bunch of videos and haven't ran into any issues re: ads leaking/appearing at the start/during or end of the videos. Seems to be working well. @stephendonner nicely done with #21813 (comment).