This change scrubs the device related info from GPUAdapterInfo namely vendor, architecture and device.
This change adds a patch to the upstream gpu_adapter.cc to intercept right before the moment we create the gpu adapter info, to scrub out these attributes. It was not possible to do it in gpu_adapter_info.cc as it lacked any context around ExecutionContext which was needed to get the farbling level.
Below are the final behaviour with different farbling levels after this change:
Farbling "off"
- No change in behaviour i.e no scrubbing will occur.
Farbling "balanced" with WebGLBalancedFingerprintingProtection enabled
- Scrub the device related info from GPUAdapterInfo.
Farbling "balanced" with WebGLBalancedFingerprintingProtection disabled
- No change in behaviour i.e no scrubbing will occur.
Farbling "maximum":
- Scrub the device related info from GPUAdapterInfo. Note that this is a new behaviour and not to tied to any feature flag. For maximum farbling it makes sense to have the maximum protection.
Resolvesbrave/brave-browser#55677
r0hit0303
c16b4ec7fe
