[Follow up to #33275] Debouncing feature is not working for Base64 and Regex (multi) test cases

[hffvld]

Description:

Follow-up to #33275

Steps to Reproduce

1. Launch Brave
2. Go to https://dev-pages.brave.software/navigation-tracking/debouncing.html
3. Run through all 4 test cases > Observe, Base64 and Regex (multi) tests fail

Actual result:

The debouncing feature is not working for the Base64 and Regex (multi) test cases with Brave's default settings.

Default	Base64	Regex	Regex (multi)

Expected result:

When running any of the 4 test cases, dev-pages.brave.software referrer must be seen with Debouncing enabled.

Reproduces how often: [Easily reproduced, Intermittent Issue]

Easily reproduced

Brave Version:

Brave build: 1.64 (109)
BraveCore: 1.64.109 (123.0.6312.58)

• Can you reproduce this issue with the most recent build from TestFlight? YES
• Can you reproduce this issue with the previous version of the current build from TestFlight? YES
• Can you reproduce this issue with the current build from AppStore? YES

Device details:

iPhone 14 / iOS 17.4

Website problems only:

• Does the issue resolve itself when disabling Brave Shields?
• Is the issue reproducible on the latest version of Mobile Safari?

Additional Information

cc @cuba

[cuba]

Fixed in the followng debounce refactor which uses the brave-core components:
brave/brave-core#22039

[Uni-verse]

Verified on iPhone 12 running iOS 17.3.1 using version 1.66.90

• Ensured that all 4 cases are showing https://dev-pages.brave.software for Observed Referrer
• Ensured that "NoSuchKey" page is shown when disabling Auto-Redirect Tracking URLs in all cases.

Enabled	Disabled