Two more files with const RegExp.

utils/apidoc/mdn/extract.dart

 import 'dart:html';
 import 'dart:json';
 
 // Workaround for HTML lib missing feature.
 Range newRange() {
   return document.createRange();
 }
 
 // Temporary range object to optimize performance computing client rects
 // from text nodes.
@@ skipping 1103 matching lines @@
   }
 
   // Flatten the list of known DOM types into a faster and case-insensitive
   // map.
   domTypes = {};
   for (final domType in domTypesRaw) {
     domTypes[domType.toLowerCase()] = domType;
   }
 
   // Fix up links.
-  const SHORT_LINK = new RegExp(r'^[\w/]+$');
-  const INNER_LINK = new RegExp(r'[Ee]n/(?:[\w/]+/|)([\w#.]+)(?:\(\))?$');
-  const MEMBER_LINK = new RegExp(r'(\w+)[.#](\w+)');
-  const RELATIVE_LINK = new RegExp(r'^(?:../)*/?[Ee][Nn]/(.+)');
+  final SHORT_LINK = new RegExp(r'^[\w/]+$');
+  final INNER_LINK = new RegExp(r'[Ee]n/(?:[\w/]+/|)([\w#.]+)(?:\(\))?$');
+  final MEMBER_LINK = new RegExp(r'(\w+)[.#](\w+)');
+  final RELATIVE_LINK = new RegExp(r'^(?:../)*/?[Ee][Nn]/(.+)');
 
   // - Make relative links absolute.
   // - If we can, take links that point to other MDN pages and retarget them
   //   to appropriate pages in our docs.
   // TODO(rnystrom): Add rel external to links we didn't fix.
   for (AnchorElement a in document.queryAll('a')) {
     // Get the raw attribute because we *don't* want the browser to fully-
     // qualify the name for us since it has the wrong base address for the
     // page.
     var href = a.attributes['href'];
@@ skipping 167 matching lines @@
 }
 
 void documentLoaded(event) {
   // Load the database of expected methods and properties with an HttpRequest.
   new HttpRequest.get('${window.location}.json', (req) {
     data = JSON.parse(req.responseText);
     dbEntry = {'members': [], 'srcUrl': pageUrl};
     run();
   });
 }