src/third_party/web_platform_tests/shadow-dom/untriaged/README - cobalt - Git at Google

 This directory contains tests that have been written before the slot proposal had been adopted by the spec.
 These tests need to be triaged, fixed, and merged back into shadow-dom directory.
	This directory contains tests that have been written before the slot proposal had been adopted by the spec.
	These tests need to be triaged, fixed, and merged back into shadow-dom directory.