Migrate first block of tests in standalone to standalone_2

tests/standalone/assert_assignable_canon_test.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 file.
-//
-// VMOptions=--enable-inlining-annotations --optimization-counter-threshold=10 --no-background-compilation
-
-const AlwaysInline = "AlwaysInline";
-const NeverInline = "NeverInline";
-
-abstract class A<T extends A<T>> {
-  @AlwaysInline
-  f(x) => new R<T>(x);
-}
-
-class B extends A<B> {}
-
-class R<T> {
-  @AlwaysInline
-  R(T field);
-}
-
-class C extends B {}
-
-class D extends C {}
-
-// f will be inlined and T=B will be forwarded to AssertAssignable in the
-// R. However B will be wrapped in the TypeRef which breaks runtime TypeCheck
-// function (Instance::IsInstanceOf does not work for TypeRefs).
-@NeverInline
-f(o) => new B().f(o);
-
-main() {
-  final o = new D();
-  for (var i = 0; i < 10; i++) {
-    f(o);
-  }
-}