Enum values that ignore naming conventions in The HTML Permission Elements

While crawling The HTML Permission Elements, the following enum values were found to ignore naming conventions (lower case, hyphen separated words):

• The value "illegal_subframe" of the enum InPagePermissionMixinBlockerReason does not match the expected conventions (lower case, hyphen separated words)
• The value "unsuccesful_registration" of the enum InPagePermissionMixinBlockerReason does not match the expected conventions (lower case, hyphen separated words)
• The value "recently_attached" of the enum InPagePermissionMixinBlockerReason does not match the expected conventions (lower case, hyphen separated words)
• The value "intersection_changed" of the enum InPagePermissionMixinBlockerReason does not match the expected conventions (lower case, hyphen separated words)
• The value "intersection_out_of_viewport_or_clipped" of the enum InPagePermissionMixinBlockerReason does not match the expected conventions (lower case, hyphen separated words)
• The value "intersection_occluded_or_distorted" of the enum InPagePermissionMixinBlockerReason does not match the expected conventions (lower case, hyphen separated words)
• The value "style_invalid" of the enum InPagePermissionMixinBlockerReason does not match the expected conventions (lower case, hyphen separated words)
• The value "type_invalid" of the enum InPagePermissionMixinBlockerReason does not match the expected conventions (lower case, hyphen separated words)

See Use casing rules consistent with existing APIs in Web Platform Design Principles document for guidance.

_{Cc @dontcallmedom @tidoust}

_{This issue was detected and reported semi-automatically by Strudy based on data collected in webref.}

Open the linked The HTML Permission Elements specification and locate the InPagePermissionMixinBlockerReason enum. Review the eight listed values against the cited casing guidance, then verify the specification consistently uses lower-case, hyphen-separated values and that all enum references remain coherent.