Revert r37059 and dependent r37589. This effectively reduced the size of the getter and setter cach…

tests/lib/mirrors/lru_expect.dart

-// Copyright (c) 2014, 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.
-
-import "package:expect/expect.dart";
-
-expect(lruMapFactory) {
-  Expect.throws(() => lruMapFactory(0), (e) => e is Exception);
-
-  for (int shift = 1; shift < 5; shift++) {
-    var map = lruMapFactory(shift);
-    var capacity = (1 << shift) * 3 ~/ 4;
-    for (int value = 0; value < 100; value++) {
-      var key = "$value";
-      map[key] = value;
-      Expect.equals(value, map[key]);
-    }
-    for (int value = 0; value < 100 - capacity - 1; value++) {
-      var key = "$value";
-      Expect.equals(null, map[key]);
-    }
-    for (int value = 100 - capacity; value < 100; value++) {
-      var key = "$value";
-      Expect.equals(value, map[key]);
-    }
-  }
-}