Switch URL and URLUtils interfaces over to use ScalarValueString.

Source/core/dom/URLUtils.idl

Index: Source/core/dom/URLUtils.idl
diff --git a/Source/core/dom/URLUtils.idl b/Source/core/dom/URLUtils.idl
index 26ed382acf8385a2054e3de08d5a4df496c8d413..6bb5c2abddb57add6755d2995a123bd8a0d7154e 100644
--- a/Source/core/dom/URLUtils.idl
+++ b/Source/core/dom/URLUtils.idl
@@ -29,20 +29,20 @@
     NoInterfaceObject, // Always used on target of 'implements'
 ] interface URLUtils {
     // FIXME: should be stringifier: http://crbug.com/306606
-    // stringifier attribute DOMString href;
-    [PerWorldBindings, LogActivity=SetterOnly, LogPreviousValue] attribute DOMString href;
-    [NotEnumerable, ImplementedAs=href] DOMString toString();
-    readonly attribute DOMString origin;
+    // stringifier attribute ScalarValueString href;
+    [PerWorldBindings, LogActivity=SetterOnly, LogPreviousValue] attribute ScalarValueString href;
+    [NotEnumerable, ImplementedAs=href] ScalarValueString toString();
+    readonly attribute ScalarValueString origin;
 
-    attribute DOMString protocol;
-    attribute DOMString username;
-    attribute DOMString password;
-    attribute DOMString host;
-    attribute DOMString hostname;
-    attribute DOMString port;
-    attribute DOMString pathname;
-    attribute DOMString search;
+    attribute ScalarValueString protocol;
+    attribute ScalarValueString username;
+    attribute ScalarValueString password;
+    attribute ScalarValueString host;
+    attribute ScalarValueString hostname;
+    attribute ScalarValueString port;
+    attribute ScalarValueString pathname;
+    attribute ScalarValueString search;
     // Not yet implemented.
     // attribute URLSearchParams searchParams;
-    attribute DOMString hash;
+    attribute ScalarValueString hash;
 };