Include TypeEnvironment into KernelResult.

pkg/front_end/test/src/incremental/kernel_driver_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.
 
 import 'dart:async';
 
 import 'package:front_end/memory_file_system.dart';
 import 'package:front_end/src/base/performace_logger.dart';
 import 'package:front_end/src/fasta/kernel/utils.dart';
 import 'package:front_end/src/fasta/uri_translator_impl.dart';
@@ skipping 256 matching lines @@
     Library library = _getLibrary(result, bUri);
     expect(_getLibraryText(library), r'''
 library;
 import self as self;
 import "dart:core" as core;
 
 static field (core::String) → core::int f;
 ''');
   }
 
+  test_compile_typeEnvironment() async {
+    writeFile('/test/.packages', 'test:lib/');
+    String aPath = '/test/lib/a.dart';
+    Uri aUri = writeFile(aPath, 'class A {}');
+
+    KernelResult result = await driver.getKernel(aUri);
+    expect(result.types.coreTypes.intClass, isNotNull);
+    expect(result.types.hierarchy, isNotNull);
+  }
+
   test_limited_ast_to_binary() async {
     writeFile('/test/.packages', 'test:lib/');
     String aPath = '/test/lib/a.dart';
     String bPath = '/test/lib/b.dart';
     writeFile(aPath, r'''
 int topField = 0;
 int get topGetter => 0;
 int topFunction({p}) => 0;
 
 abstract class I {
@@ skipping 348 matching lines @@
         .writeLibraryFile(library);
     return buffer.toString();
   }
 
   /// Return the [Uri] for the given Posix [path].
   static Uri _folderUri(String path) {
     if (!path.endsWith('/')) path += '/';
     return Uri.parse('file://$path');
   }
 }