Reland "Merge more Kernel infrastructure from kernel_sdk SDK fork."

tests/kernel/unsorted/symbol_literal_test.dart

Index: tests/kernel/unsorted/symbol_literal_test.dart
diff --git a/pkg/dev_compiler/test/codegen/language/variable_named_dart_test.dart b/tests/kernel/unsorted/symbol_literal_test.dart
similarity index 64%
copy from pkg/dev_compiler/test/codegen/language/variable_named_dart_test.dart
copy to tests/kernel/unsorted/symbol_literal_test.dart
index 233b60f899e88253c5ca472b24fd67481e550624..53af588fde53defb7cf6ecb14c2762949b08d31e 100644
--- a/pkg/dev_compiler/test/codegen/language/variable_named_dart_test.dart
+++ b/tests/kernel/unsorted/symbol_literal_test.dart
@@ -2,9 +2,9 @@
 // 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';
+import 'expect.dart';
 
 main() {
-  dynamic dart = 123;
-  Expect.equals(dart.toDouble(), 123.0);
+  Expect.isTrue('${#abc}' == 'Symbol("abc")');
+  Expect.isTrue('${#abc.xzy}' == 'Symbol("abc.xzy")');
 }