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

core/html/HTMLIFrameElement.idl

Index: core/html/HTMLIFrameElement.idl
diff --git a/core/html/HTMLIFrameElement.idl b/core/html/HTMLIFrameElement.idl
index d3f8e3fcdf01a1e7eedeaad1128f58932b2eee2b..1c98d8136a73cfa2da00afe5edba6131bc993599 100644
--- a/core/html/HTMLIFrameElement.idl
+++ b/core/html/HTMLIFrameElement.idl
@@ -24,14 +24,16 @@ interface HTMLIFrameElement : HTMLElement {
     [Reflect, URL] attribute DOMString src;
     [Reflect] attribute DOMString srcdoc;
     [Reflect] attribute DOMString name;
-    [PutForwards=value] readonly attribute DOMSettableTokenList sandbox;
+    [PutForwards=value] readonly attribute DOMTokenList sandbox;
     // Note: The seamless attribute was once supported, but was removed.
     [Reflect] attribute boolean allowFullscreen;
     [Reflect] attribute DOMString width;
     [Reflect] attribute DOMString height;
-    [CheckSecurity=Node] readonly attribute Document? contentDocument;
+    [CheckSecurity=ReturnValue] readonly attribute Document? contentDocument;
     readonly attribute Window? contentWindow;
-    [CheckSecurity=Node, RaisesException] Document? getSVGDocument();
+    [CheckSecurity=ReturnValue, RaisesException] Document? getSVGDocument();
+    [RuntimeEnabled=ReferrerPolicyAttribute, Reflect, ReflectOnly=("","no-referrer","origin","no-referrer-when-downgrade","origin-when-cross-origin","unsafe-url"), ReflectMissing="", ReflectInvalid=""] attribute DOMString referrerpolicy;
+
 
     // obsolete members
     // https://html.spec.whatwg.org/#HTMLIFrameElement-partial