Rename URLUtils interface as HTMLHyperlinkElementUtils and update.

third_party/WebKit/Source/core/dom/URL.idl

Index: third_party/WebKit/Source/core/dom/URL.idl
diff --git a/third_party/WebKit/Source/core/dom/URL.idl b/third_party/WebKit/Source/core/dom/URL.idl
index 449b13bf27b79a74a8e0bcc4bcac6077f2e514f6..35f6f7fe2b08aa6811828b2733b510d9b41c7c2d 100644
--- a/third_party/WebKit/Source/core/dom/URL.idl
+++ b/third_party/WebKit/Source/core/dom/URL.idl
@@ -43,7 +43,28 @@
     // TODO(philipj): The return type should not be nullable.
     [RaisesException, CallWith=ExecutionContext] static DOMString? createObjectURL(Blob blob);
     [CallWith=ExecutionContext] static void revokeObjectURL(DOMString url);
+
+    // TODO(sof): 'stringifier' entails an enumerable toString(),

[philipj_slow, 2016/04/19 12:40:00]

There are a few cases of "[NotEnumerable] stringifier" already, the one in
DOMTokenList with a FIXME even. If ImplementedAs works together with
stringifier, then using that would be a teeny bit nicer I think. You just moved
this code, so you pick :)

[sof, 2016/04/19 12:46:03]

That alternative doesn't work I'm afraid with
https://codereview.chromium.org/1901983002 in scope, so keeping it as-is.

[philipj_slow, 2016/04/19 12:52:25]

Acknowledged.

+    //   http://heycam.github.io/webidl/#es-stringifier
+    // something URL currently doesn't provide. Switch it over to being
+    // enumerable (http://crbug.com/306606).
+    //
+    // Until that time, do not use 'stringifier'.
+    // stringifier attribute USVString href;
+    attribute USVString href;
+    [NotEnumerable, ImplementedAs=href] USVString toString();
+
+    readonly attribute USVString origin;
+
+    attribute USVString protocol;
+    attribute USVString username;
+    attribute USVString password;
+    attribute USVString host;
+    attribute USVString hostname;
+    attribute USVString port;
+    attribute USVString pathname;
+    attribute USVString search;
     readonly attribute URLSearchParams searchParams;
+    attribute USVString hash;
 };
 
-URL implements URLUtils;