Fingerprinting 2.0: WebGL getParameter handling

[pilgrim-brave]

This is a sub-issue of the larger fingerprint defense reorganization issue: #8787`

Debugging Endpoint

Calling WebGLRenderingContext.getExtension('WEBGL_debug_renderer_info') returns a WEBGL_debug_renderer_info object. This return value should be treated separately from the above uses of getExtension and getParameter.

default protection: no changes
max protection: for each value (UNMASKED_VENDOR_WEBGL and UNMASKED_RENDERER_WEBGL) return 8 characters [0-9a-zA-Z], randomly determined from eTLD+1 seed

[pes10k]

I've added this to the QA pages, noted it as 1.12, and only aggressive mode ("agg")

[LaurenWags]

Verified passed with

Brave | 1.12.92 Chromium: 84.0.4147.89 (Official Build) dev (64-bit)
-- | --
Revision | 19abfe7bcba9318a0b2a6bc6634a67fc834aa592-refs/branch-heads/4147@{#852}
OS | macOS Version 10.14.6 (Build 18G3020)

• Visited https://dev-pages.brave.software/farbling.html and https://dev-pages.bravesoftware.com/farbling.html to run the Fingerprint Values tests on the Farbling pages.

Fingerprinting blocked set to Standard

• Confirmed WebGL Vendor and Render is the same on both pages with Standard setting
• Confirmed other FP values behaved as expected

Fingerprinting blocked set to Strict

• Confirmed WebGL Vendor and Render is the different on both pages with Strict setting
• Confirmed other FP values behaved as expected except for WebGL Drawing, observed already logged issue for this - [Desktop] WebGL Drawing FP blocking not working correctly when FP set to Strict #10675

Shields down

• Confirmed WebGL Vendor and Render is the same on both pages with shields down
• Confirmed other FP values behaved as expected
• Confirmed closing the browser, relaunching and generating FPs again produced the same ones as previous session since shields are down

---

Verification passed on

Brave | 1.12.94 Chromium: 84.0.4147.89 (Official Build) dev (64-bit)
-- | --
Revision | 19abfe7bcba9318a0b2a6bc6634a67fc834aa592-refs/branch-heads/4147@{#852}
OS | Windows 10 OS Version 1903 (Build 18362.959)

• Visited https://dev-pages.brave.software/farbling.html and https://dev-pages.bravesoftware.com/farbling.html to run the Fingerprint Values tests on the Farbling pages.

Fingerprint blocked set to standard

• Confirmed WebGL Vendor and Render is the same on both pages with Standard setting
• Confirmed other FP values behaved as expected
  
  

Fingerprint blocked set to Strict

* Confirmed `WebGL Vendor and Render` is the different on both pages with Strict setting * Confirmed other FP values behaved as expected except for `WebGL Drawing`, encountered - https://github.com//issues/10675  

Shields down

• Confirmed WebGL Vendor and Render is the same on both pages with shields down
• Confirmed other FP values behaved as expected
• Confirmed closing the browser, relaunching and generating FPs again produced the same ones as previous session since shields are down

---

Verification passed on

Brave	1.12.102 Chromium: 84.0.4147.89 (Official Build) dev (64-bit)
Revision	19abfe7bcba9318a0b2a6bc6634a67fc834aa592-refs/branch-heads/4147@{#852}
OS	Ubuntu 18.04 LTS

• Visited https://dev-pages.brave.software/farbling.html and https://dev-pages.bravesoftware.com/farbling.html to run the Fingerprint Values tests on the Farbling pages.

Fingerprint blocked set to standard

• Confirmed WebGL Vendor and Render is the same on both pages with Standard setting
• Confirmed other FP values behaved as expected
  

Fingerprint blocked set to Strict

* Confirmed `WebGL Vendor and Render` is the different on both pages with Strict setting * Confirmed other FP values behaved as expected except for `WebGL Drawing`, encountered - https://github.com//issues/10675 

Shields down

• Confirmed WebGL Vendor and Render is the same on both pages with shields down
• Confirmed other FP values behaved as expected
• Confirmed closing the browser, relaunching and generating FPs again produced the same ones as previous session since shields are down
  

[srirambv]

Verification passed on OnePlus 6T with Android 10 running 1.12.111 x64 build

Fingerprint set to `Block cross-site fingerprint` (default)

• Verified WebGL Vendor and Render is the same on both pages with Standard setting
• Verified other FP values behaved as expected

https://dev-pages.brave.software/farbling.html	https://dev-pages.bravesoftware.com/farbling.html

Fingerprint set to `Block all fingerprint`

• Verified WebGL Vendor and Render is different on both pages when setting is set to block all
• Verified other FP values behaved as expected

https://dev-pages.brave.software/farbling.html	https://dev-pages.bravesoftware.com/farbling.html

Shields Off

• Verified WebGL Vendor and Render is the same on both pages with shields down
• Verified other FP values behaved as expected
• Verified closing the browser, relaunching and generating FPs again produced the same values as the previous session since shields are down

https://dev-pages.brave.software/farbling.html	https://dev-pages.bravesoftware.com/farbling.html

---

Verification passed on Samsung Tab A with Android 10 running 1.12.111 x64 build

Fingerprint set to `Block cross-site fingerprint` (default)

• Verified WebGL Vendor and Render is the same on both pages with Standard setting
• Verified other FP values behaved as expected

https://dev-pages.brave.software/farbling.html	https://dev-pages.bravesoftware.com/farbling.html

Fingerprint set to `Block all fingerprint`

• Verified WebGL Vendor and Render is different on both pages when setting is set to block all
• Verified other FP values behaved as expected

https://dev-pages.brave.software/farbling.html	https://dev-pages.bravesoftware.com/farbling.html

Shields Off

• Verified WebGL Vendor and Render is the same on both pages with shields down
• Verified other FP values behaved as expected
• Verified closing the browser, relaunching and generating FPs again produced the same values as the previous session since shields are down

https://dev-pages.brave.software/farbling.html	https://dev-pages.bravesoftware.com/farbling.html