Make getKeys, getValues getters (keys, values).

utils/apidoc/mdn/util.dart

 #library("util");
 
 #import("dart:io");
 #import("dart:json");
 
 Map<String, Map> _allProps;
 
 Map<String, Map> get allProps {
   if (_allProps == null) {
     // Database of expected property names for each type in WebKit.
@@ skipping 39 matching lines @@
  */
 num scoreEntry(Map entry, String type) {
   num score = 0;
   // TODO(jacobr): consider removing skipped entries completely instead of
   // just giving them lower scores.
   if (!entry.containsKey('skipped')) {
     score++;
   }
   if (entry.containsKey("members")) {
     Map members = getMembersMap(entry);
-    for (String name in members.getKeys()) {
+    for (String name in members.keys) {
       if (hasAny(type, name)) {
         score++;
       }
     }
   }
   return score;
 }
 
 /**
  * Given a list of candidates for the documentation for a type, find the one
@@ skipping 16 matching lines @@
 
 /**
  * Helper for sync creation of a whole file from a string.
  */
 void writeFileSync(String filename, String data) {
   File f = new File(filename);
   RandomAccessFile raf = f.openSync(FileMode.WRITE);
   raf.writeStringSync(data);
   raf.closeSync();
 }