There is a ton of implemented stuff not included.
Created attachment 262917 [details] patch
Comment on attachment 262917 [details] patch r=me
Attachment 262917 [details] did not pass style-queue: ERROR: Source/JavaScriptCore/features.json:0: The features should be sorted alphabetically by name, "Arrow Functions" appears after "for...of Loops". [json/syntax] [5] ERROR: Source/JavaScriptCore/features.json:0: The features should be sorted alphabetically by name, "Classes" appears after "Destructuring Syntax". [json/syntax] [5] ERROR: Source/JavaScriptCore/features.json:0: The features should be sorted alphabetically by name, "Block Scoping" appears after "Reflect API". [json/syntax] [5] ERROR: Source/JavaScriptCore/features.json:0: The features should be sorted alphabetically by name, "Modules" appears after "Tail Calls". [json/syntax] [5] Total errors found: 4 in 2 files If any of these errors are false positives, please file a bug against check-webkit-style.
landed in: http://trac.webkit.org/changeset/190889