Fixing dart:html links _not_ found in docs.json

tools/dom/src/CrossFrameTypes.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of html;
 
 /**
  * Top-level container for a browser tab or window.
  *
  * In a web browser, a [WindowBase] object represents any browser window. This
@@ skipping 21 matching lines @@
    *     Location currentLocation = window.location;
    *     print(currentLocation.href); // 'http://www.example.com:80/'
    */
   LocationBase get location;
 
   /**
    * The current session history for this window.
    *
    * ## Other resources
    *
-   * * [Session history and navigation specification]
-   * (http://www.whatwg.org/specs/web-apps/current-work/multipage/history.html)
-   * from WHATWG.
+   * * [Session history and navigation
+   *   specification](https://html.spec.whatwg.org/multipage/browsers.html#history)
+   *   from WHATWG.
    */
   HistoryBase get history;
 
   /**
    * Indicates whether this window has been closed.
    *
    *     print(window.closed); // 'false'
    *     window.close();
    *     print(window.closed); // 'true'
    */
@@ skipping 72 matching lines @@
    *
    * * [Window close discussion](http://www.w3.org/TR/html5/browsers.html#dom-window-close) from the W3C
    */
   void close();
 
   /**
    * Sends a cross-origin message.
    *
    * ## Other resources
    *
-   * * [window.postMessage]
-   * (https://developer.mozilla.org/en-US/docs/Web/API/Window.postMessage) from
-   * MDN.
-   * * [Cross-document messaging]
-   * (http://www.whatwg.org/specs/web-apps/current-work/multipage/web-messaging.html)
-   * from WHATWG.
+   * * [window.postMessage](https://developer.mozilla.org/en-US/docs/Web/API/Window.postMessage)
+   *   from MDN.
+   * * [Cross-document messaging](https://html.spec.whatwg.org/multipage/comms.html#web-messaging)
+   *   from WHATWG.
    */
   void postMessage(var message, String targetOrigin, [List messagePorts]);
 }
 
 abstract class LocationBase {
   void set href(String val);
 }
 
 abstract class HistoryBase {
   void back();
   void forward();
   void go(int distance);
 }