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

pkg/kernel/testcases/reify/generic_methods_dynamic_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 if the type of a parameter of a generic method depends on a type
+// parameter, the type of the passed argument is checked at runtime if the
+// receiver is dynamic. The checks should pass if the variables are declared
+// correctly.
+
+library generic_methods_dynamic_test;
+
+import "test_base.dart";
+
+class A {}
+
+class B {}
+
+class C {
+  T foo<T>(T t) => t;
+  List<T> bar<T>(Iterable<T> t) => <T>[t.first];
+}
+
+main() {
+  B b = new B();
+  C c = new C();
+  dynamic obj = c;
+
+  expectTrue(c.foo<B>(b) == b);
+  expectTrue(obj.foo<B>(b) == b);
+
+  dynamic x = c.bar<B>(<B>[new B()]);
+  expectTrue(x is List<B>);
+  expectTrue(x.length == 1);
+
+  dynamic y = obj.bar<B>(<B>[new B()]);
+  expectTrue(y is List<B>);
+  expectTrue(y.length == 1);
+}