Expose some NavigatorID members only on Window

The set of attributes with [Exposed=Window] is the union of attributes
NOT exposed on Worker in shipping browsers:

Blink: productSub, vendor, vendorSub
Edge: appCodeName
Gecko: productSub, vendor, vendorSub
WebKit: appCodeName, product, productSub, vendor, vendorSub

Fixes #216

source

@@ -89126,15 +89126,15 @@ interface <dfn>WindowModal</dfn> {
 
   <pre class="idl">[NoInterfaceObject, Exposed=(Window,Worker)]
 interface <dfn>NavigatorID</dfn> {
-  readonly attribute DOMString <span data-x="dom-navigator-appCodeName">appCodeName</span>; // constant "Mozilla"
+  [Exposed=Window] readonly attribute DOMString <span data-x="dom-navigator-appCodeName">appCodeName</span>; // constant "Mozilla"
   readonly attribute DOMString <span data-x="dom-navigator-appName">appName</span>; // constant "Netscape"
   readonly attribute DOMString <span data-x="dom-navigator-appVersion">appVersion</span>;
   readonly attribute DOMString <span data-x="dom-navigator-platform">platform</span>;
-  readonly attribute DOMString <span data-x="dom-navigator-product">product</span>; // constant "Gecko"
-  readonly attribute DOMString <span data-x="dom-navigator-productSub">productSub</span>;
+  [Exposed=Window] readonly attribute DOMString <span data-x="dom-navigator-product">product</span>; // constant "Gecko"
+  [Exposed=Window] readonly attribute DOMString <span data-x="dom-navigator-productSub">productSub</span>;
   readonly attribute DOMString <span data-x="dom-navigator-userAgent">userAgent</span>;
-  readonly attribute DOMString <span data-x="dom-navigator-vendor">vendor</span>;
-  readonly attribute DOMString <span data-x="dom-navigator-vendorSub">vendorSub</span>; // constant ""
+  [Exposed=Window] readonly attribute DOMString <span data-x="dom-navigator-vendor">vendor</span>;
+  [Exposed=Window] readonly attribute DOMString <span data-x="dom-navigator-vendorSub">vendorSub</span>; // constant ""
 };</pre>
 
   <p>In certain cases, despite the best efforts of the entire industry, Web browsers have bugs and