Searching in page does not work when script blocking is enabled

[tillrathmann]

Description:

Searching in page does not work when script blocking is enabled

Steps to Reproduce

1. Enable blocking scripts.
2. Open a website.
3. Search in page.

Actual result:

Search in page functionality is not working.

Expected result:

Search in page should work in all cases, also with script blocking enabled.

Reproduces how often: [Easily reproduced, Intermittent Issue]

Easily.

Brave Version:

1.20 (20.09.11.20)

Device details:

iPhone SE 1 (iOS 14.0.1)

Additional Information

In Safari searching in a page works even when Javascript is disabled in the settings.

[iccub]

This was a limitation on iOS13 and older devices,
I believe iOS14 brought few handy APIs and we can fix it for iOS14+

[kjozwiak]

• Verification PASSED on iPhone 11 running iOS 14.6 using 1.27 (21.6.10.21)
• Verification PASSED on iPad Air (3rd Gen) running iOS 14.5 using 1.27 (21.6.10.21)

Test Case #1

• enabled Blocked Scripts globally via Brave Shields & Privacy under Settings
• visited https://en.wikipedia.org/wiki/Main_Page
• ensured that search is working via the omnibox and Find in Page via the Settings menu

Test Case #2

• visit https://en.wikipedia.org/wiki/Main_Page and enable Block Scripts via the shields panel
• ensured that search is working via the omnibox and Find in Page via the Settings menu

Created #3772 while running through the above.

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Verification passed on iPhone 7+ with iOS 14.5.1 running 1.27(21.6.10.21)

• Verified able to perform search when scripts are blocked on an individual site
• Verified able to perform page search when scripts are blocked globally

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Verification passed on iPad Pro with iOS 14.6 running 1.27(21.6.10.21)

• Verified able to perform search when scripts are blocked on an individual site
• Verified able to perform page search when scripts are blocked globally