[De-AMP] Add support for checking de_amp_enabled user pref in cosmetic js filter

[ShivanKaul]

Add support for checking of DeAmp pref and flag in Cosmetic Filters JS Handlers, and add the boolean to the wrapping pre-init script.

This is done so that we can add a new scriptlet for removing jsaction HTML attributes from anchor tags on Google SERP.

More details here: https://docs.google.com/document/d/1kvHbQMdE_vxmRWRz0LfAHzf6XoTT_pQXSwxth5rVhsk/edit#heading=h.okf43yiuecg5

[kjozwiak]

The above will require 1.38.105 or higher for 1.38.x verification 👍 Examples verification being completed can be found via brave/brave-core#12923 (comment).

[MadhaviSeelam]

Verification Passed

Brave	1.38.106 Chromium: 101.0.4951.41 (Official Build) (64-bit)
Revision	93c720db8323b3ec10d056025ab95c23a31997c9-refs/branch-heads/4951@{#904}
OS	Windows 11 Version 21H2 (Build 22000.613)

Pre-requisites: Mobile emulation via DevTools and set to Samsung Galaxy S8+

de-AMP Disabled

• ensured that Auto-redirect AMP pages was disabled via brave://settings/shields
• Loaded https://www.google.co.uk and then searched for Top Stories
• inspected the first article via DevTools and ensured that jsaction attribute appeared in the anchor link
• clicked on the link and ensured that the AMP version of the website/news article was being loaded
  • URL: https://www.nytimes.com/live/2022/04/25/world/ukraine-russia-war-news.amp.html
• validated with google.com as well and results were same as expected

ex1	ex2	ex3	ex4
			<

de-AMP Enabled

• ensured that Auto-redirect AMP pages was enabled via brave://settings/shields
• loaded https://www.google.co.uk and then searched for Top Stories
• inspected the first article via DevTools and ensured that jsaction attribute wasn't appeared in the anchor link
• clicked on the link and ensured that the de-AMP version of the website/news article was being loaded
• validated with google.com as well and results were same as expected

ex1	ex2	ex3	ex4

[stephendonner]

Verified PASSED using

Brave	1.38.107 Chromium: 101.0.4951.41 (Official Build) (x86_64)
Revision	93c720db8323b3ec10d056025ab95c23a31997c9-refs/branch-heads/4951@{#904}
OS	macOS Version 11.6.5 (Build 20G527)

Pre-requisites: Mobile emulation via DevTools and set to Samsung Galaxy S8+

de-AMP Disabled

• ensured that Auto-redirect AMP pages was disabled via brave://settings/shields
• Loaded https://www.google.co.uk and then searched for Top Stories
• inspected the first article via DevTools and ensured that jsaction attribute appeared in the anchor link
• clicked on the link and ensured that the AMP version of the website/news article was being loaded
  • URL: https://www.nytimes.com/live/2022/04/25/world/ukraine-russia-war-news.amp.html
• validated with google.com as well and results were same as expected

ex1	ex2	ex3	ex4

de-AMP Enabled

• ensured that Auto-redirect AMP pages was enabled via brave://settings/shields
• loaded https://www.google.co.uk and then searched for Top Stories
• inspected the first article via DevTools and ensured that jsaction attribute didn't appear in the anchor link
• clicked on the link and ensured that the de-AMP version of the website/news article was being loaded
• validated with google.com as well and results were same as expected

ex1	ex2	ex3	ex4

[kjozwiak]

Verification PASSED on Samsung S10+ running Android 12 using the following build(s):

Brave | 1.38.107 Chromium: 101.0.4951.41 (Official Build) (32-bit)
--- | ---
Revision | 93c720db8323b3ec10d056025ab95c23a31997c9-refs/branch-heads/4951@{#904}
OS | Android 12; Build/SP1A.210812.016

Went through the STR/Cases outlined via brave/brave-core#12923 (comment).

de-AMP Disabled

• ensured that Auto-redirect AMP pages was disabled via brave://settings/privacy
• loaded https://www.google.com and then searched for Top Stories
• inspected the first article via DevTools and ensured that jsaction attribute appeared in the anchor link
• clicked on the link and ensured that the AMP version of the website/news article was being loaded
  • Example --> https://www.cbc.ca/amp/1.6425708

Example	Example	Example	Example

de-AMP Enabled

• ensured that Auto-redirect AMP pages was enabled via brave://settings/privacy
• loaded https://www.google.com and then searched for Top Stories
• inspected the first article via DevTools and ensured that jsaction attribute wasn't appeared in the anchor link
• clicked on the link and ensured that the de-AMP version of the website/news article was being loaded

Example	Example	Example

Quick note: I also tried https://www.google.ca & https://www.google.co.uk

[kjozwiak]

After speaking with @ShivanKaul, running through the mobile cases should be enough and tablet can be skipped. Tablet doesn't use AMP as much as the mobiles due to the view usually being Desktop due to the bigger screens. However, double checked and ensured that the feature has been enabled by default.

[btlechowski]

Verification passed on

Brave	1.38.107 Chromium: 101.0.4951.41 (Official Build) (64-bit)
Revision	93c720db8323b3ec10d056025ab95c23a31997c9-refs/branch-heads/4951@{#904}
OS	Ubuntu 18.04 LTS

Pre-requisites: Mobile emulation via DevTools and set to Samsung Galaxy S8+

de-AMP Disabled

• ensured that Auto-redirect AMP pages was disabled via brave://settings/shields
• Loaded https://www.google.co.uk and then searched for Top Stories
• inspected the first article via DevTools and ensured that jsaction attribute appeared in the anchor link
• clicked on the link and ensured that the AMP version of the website/news article was being loaded
  • URL: https://www.nytimes.com/live/2022/04/25/world/ukraine-russia-war-news.amp.html
• validated with google.com as well and results were same as expected

de-AMP Enabled

• ensured that Auto-redirect AMP pages was enabled via brave://settings/shields
• loaded https://www.google.co.uk and then searched for Top Stories
• inspected the first article via DevTools and ensured that jsaction attribute wasn't appeared in the anchor link
• clicked on the link and ensured that the de-AMP version of the website/news article was being loaded
• validated with google.com as well and results were same as expected