Implement support for static accessors

pkg/kernel/testcases/interpreter/static_accessors.dart

+// Copyright (c) 2016, 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.md file.
+
+main(arguments) {
+  test1(f1);
+  test2(f2);
+
+  if (37 != v1) throw "Unexpected value: v1 = $v1, expected value: 37";
+  v1 = 42;
+  if (42 != v1) throw "Unexpected value: v1 = $v1, expected value: 42";
+  if (v2 != null) throw "Unexpected value: v2 = $v2, expected value: null";
+  v2 = 42;
+  if (42 != v2) throw "Unexpected value: v2 = $v2, expected value: 42";
+  setter = 37;
+  if (37 != v1) throw "Unexpected value: v1 = $v1, expected value: 37";
+  if (37 != getter)
+    throw "Unexpected getter value: v1 = ${getter}, expected value: 37";
+}
+
+f1(a, [b = 10]) => a + b;
+f2(a, {b = 10}) => a + b;
+
+var v1 = 37;
+var v2;
+
+int get getter => v1;
+
+void set setter(int v) {
+  v1 = v;
+}
+
+test1(Function f) {
+  var result = f(40, 2);
+  if (42 != result) throw "Unexpected result: $result";
+}
+
+test2(Function f) {
+  var result = f(40, b: 2);
+  if (42 != result) throw "Unexpected result: $result";
+}