Add generic-methods 'golden' tests for 'reify' transformation

pkg/kernel/testcases/reify/generic_methods_generic_class_tearoff_test.dart

+// Copyright (c) 2017, 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.
+
+// Test that a torn off method of a generic class is not a generic method,
+// and that it is correctly specialized.
+
+library generic_methods_generic_class_tearoff_test;
+
+import "test_base.dart";
+
+class A<T> {
+  T fun(T t) => t;
+}
+
+typedef Int2Int = int Function(int);
+typedef String2String = String Function(String);
+typedef Object2Object = Object Function(Object);
+typedef GenericMethod = T Function<T>(T);
+
+main() {
+  A<int> x = new A<int>();
+  var f = x.fun; // The type of f should be 'int Function(Object)'.
+  A<String> y = new A<String>();
+  var g = y.fun; // The type of g should be 'String Function(Object)'.
+  A z = new A();
+  var h = z.fun; // The type of h should be 'dynamic Function(Object)'.
+
+  expectTrue(f is Int2Int);
+  expectTrue(f is! String2String);
+  expectTrue(f is Object2Object);
+  expectTrue(f is! GenericMethod);
+
+  expectTrue(g is! Int2Int);
+  expectTrue(g is String2String);
+  expectTrue(g is Object2Object);
+  expectTrue(g is! GenericMethod);
+
+  expectTrue(h is! Int2Int);
+  expectTrue(h is! String2String);
+  expectTrue(h is Object2Object);
+  expectTrue(h is! GenericMethod);
+}