Bug 1838415 - Introduce RFPTarget::UseStandinsForNativeColors. r=tjr

Differential Revision: https://phabricator.services.mozilla.com/D181241

layout/style/PreferenceSheet.cpp

@@ -93,7 +93,7 @@ static bool UseStandinsForNativeColors() {
              "enabled, so we check the global preference"
              "not excluding chrome browsers or webpages, so we call the legacy "
              "RFP function to prevent that",
-             RFPTarget::Unknown) ||
+             RFPTarget::UseStandinsForNativeColors) ||
          StaticPrefs::ui_use_standins_for_native_colors();
 }
 

toolkit/components/resistfingerprinting/RFPTargets.inc

@@ -68,6 +68,7 @@ ITEM_VALUE(FontVisibilityLangPack,      1llu << 43)
 ITEM_VALUE(DeviceSensors,               1llu << 44)
 ITEM_VALUE(FrameRate,                   1llu << 45)
 ITEM_VALUE(RoundWindowSize,             1llu << 46)
+ITEM_VALUE(UseStandinsForNativeColors,  1llu << 47)
 
 // !!! Don't forget to update kDefaultFingerintingProtections in nsRFPService.cpp
 // if necessary.