supports          291 Source/core/css/CSSGrammar.y %type <rule> supports
supports          505 Source/core/css/CSSGrammar.y   | supports
supports          551 Source/core/css/CSSGrammar.y   | supports
supports          745 Source/core/css/CSSGrammar.y supports:
supports           44 Source/core/css/DOMWindowCSS.h     bool supports(const String& property, const String& value) const;
supports           45 Source/core/css/DOMWindowCSS.h     bool supports(const String& conditionText) const;