Roll 50: Copied IDLs, PYTHON scripts from WebKit removed deleted files in WebCore

core/html/HTMLLinkElement.idl

Index: core/html/HTMLLinkElement.idl
diff --git a/core/html/HTMLLinkElement.idl b/core/html/HTMLLinkElement.idl
index 91c040e6c029e42029283f1a632a902b1e878fb6..1d19a864b8a314db3c13667583ad367acb33b99b 100644
--- a/core/html/HTMLLinkElement.idl
+++ b/core/html/HTMLLinkElement.idl
@@ -28,11 +28,12 @@ interface HTMLLinkElement : HTMLElement {
     [Reflect, URL] attribute DOMString href;
     [Reflect, ReflectOnly=("anonymous","use-credentials"), ReflectEmpty="anonymous", ReflectInvalid="anonymous"] attribute DOMString? crossOrigin;
     [Reflect] attribute DOMString rel;
-    // FIXME: readonly attribute DOMTokenList relList;
+    [RuntimeEnabled=LinkPreload, PutForwards=value] readonly attribute DOMTokenList relList;
     [Reflect] attribute DOMString media;
     [Reflect] attribute DOMString hreflang;
     [Reflect] attribute DOMString type;
-    [PutForwards=value] readonly attribute DOMSettableTokenList sizes;
+    [Reflect, RuntimeEnabled=LinkPreload] attribute DOMString as;
+    [PutForwards=value] readonly attribute DOMTokenList sizes;
 
     // obsolete members
     // https://html.spec.whatwg.org/#HTMLLinkElement-partial