Make getKeys, getValues getters (keys, values).

tests/corelib/linked_hash_map_test.dart

 // Copyright (c) 2011, 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.
 
 // Dart test for linked hash-maps.
 
 class LinkedHashMapTest {
   static void testMain() {
     Map map = new LinkedHashMap();
     map["a"] = 1;
@@ skipping 44 matching lines @@
 
     final keysInOrder = const ["a", "b", "c", "d", "e"];
     final valuesInOrder = const [1, 2, 3, 4, 5];
 
     clear();
     map.forEach(testForEachMap);
     verifyKeys(keysInOrder);
     verifyValues(valuesInOrder);
 
     clear();
-    map.getKeys().forEach(testForEachKey);
+    map.keys.forEach(testForEachKey);
     verifyKeys(keysInOrder);
 
     clear();
-    map.getValues().forEach(testForEachValue);
+    map.values.forEach(testForEachValue);
     verifyValues(valuesInOrder);
 
     // Remove and then insert.
     map.remove("b");
     map["b"] = 6;
     final keysAfterBMove = const ["a", "c", "d", "e", "b"];
     final valuesAfterBMove = const [1, 3, 4, 5, 6];
 
 
     clear();
     map.forEach(testForEachMap);
     verifyKeys(keysAfterBMove);
     verifyValues(valuesAfterBMove);
 
     clear();
-    map.getKeys().forEach(testForEachKey);
+    map.keys.forEach(testForEachKey);
     verifyKeys(keysAfterBMove);
 
     clear();
-    map.getValues().forEach(testForEachValue);
+    map.values.forEach(testForEachValue);
     verifyValues(valuesAfterBMove);
 
     // Update.
     map["a"] = 0;
     final valuesAfterAUpdate = const [0, 3, 4, 5, 6];
 
     clear();
     map.forEach(testForEachMap);
     verifyKeys(keysAfterBMove);
     verifyValues(valuesAfterAUpdate);
 
     clear();
-    map.getKeys().forEach(testForEachKey);
+    map.keys.forEach(testForEachKey);
     verifyKeys(keysAfterBMove);
 
     clear();
-    map.getValues().forEach(testForEachValue);
+    map.values.forEach(testForEachValue);
     verifyValues(valuesAfterAUpdate);
   }
 }
 
 main() {
   LinkedHashMapTest.testMain();
 }