Implement referrerpolicy attribute for anchor elements

Source/core/html/HTMLAnchorElement.idl

Index: Source/core/html/HTMLAnchorElement.idl
diff --git a/Source/core/html/HTMLAnchorElement.idl b/Source/core/html/HTMLAnchorElement.idl
index a91eb2395c6067ef48fa84d30a4d1e4e44f8809e..66a104bdc619140bfdcec9a8844d3e168502d92e 100644
--- a/Source/core/html/HTMLAnchorElement.idl
+++ b/Source/core/html/HTMLAnchorElement.idl
@@ -29,6 +29,7 @@ interface HTMLAnchorElement : HTMLElement {
     // FIXME: readonly attribute DOMTokenList relList;
     [Reflect] attribute DOMString hreflang;
     [Reflect] attribute DOMString type;
+    [Reflect] attribute DOMString referrerpolicy;

[jochen (gone - plz use gerrit), 2015/07/28 14:35:36]

this should be a guarded by a runtime flag
(https://www.chromium.org/blink/runtime-enabled-features)

you should also send an intent to implement to blink-dev@

last but not least, you should use ReflectOnly to restrict the attribute to
valid values:
https://www.chromium.org/blink/webidl/blink-idl-extended-attributes#TOC-Refle...

[estark, 2015/07/29 20:54:41]

Done.
Done.
Done.

 
     [ImplementedAs=textContent] attribute DOMString text;