Move productSub/vendor/vendorSub to Navigator class

Source/core/page/Navigator.idl

Index: Source/core/page/Navigator.idl
diff --git a/Source/core/page/Navigator.idl b/Source/core/page/Navigator.idl
index 6d23efd4bdf7e1aac92e98be80f7773c0ce20c4e..79f322d89f4804ae2c076cb5d5e6e72de0516659 100644
--- a/Source/core/page/Navigator.idl
+++ b/Source/core/page/Navigator.idl
@@ -23,13 +23,15 @@ interface Navigator {
     readonly attribute PluginArray plugins;
     readonly attribute MimeTypeArray mimeTypes;
     readonly attribute DOMString product;
-    readonly attribute DOMString productSub;
-    readonly attribute DOMString vendor;
-    readonly attribute DOMString vendorSub;
     readonly attribute boolean cookieEnabled;
     boolean javaEnabled();
 
     void getStorageUpdates(); // FIXME: Remove this method or rename to yieldForStorageUpdates.
+
+    // Non-standard.
+    [MeasureAs=NavigatorProductSub] readonly attribute DOMString productSub;
+    [MeasureAs=NavigatorVendor] readonly attribute DOMString vendor;
+    [MeasureAs=NavigatorVendorSub] readonly attribute DOMString vendorSub;
 };
 
 Navigator implements NavigatorID;