Wire up class hierarchy for recursive inheritance

test/codegen_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.
 
 /// Tests code generation.
 ///
 /// Runs Dart Dev Compiler on all input in the `codegen` directory and checks
 /// that the output is what we expected.
 library dev_compiler.test.codegen_test;
 
@@ skipping 67 matching lines @@
 
   // Build packages tests depend on.
   _buildAllPackages(compiler);
 
   var testDirs = [
     'language',
     'corelib',
     path.join('lib', 'convert'),
     path.join('lib', 'html'),
     path.join('lib', 'math'),
-    path.join('lib', 'typed_data')
+    path.join('lib', 'typed_data'),
   ];
 
   // Copy all of the test files and expanded multitest files to
   // gen/codegen_tests. We'll compile from there.
   var testFiles = _setUpTests(testDirs, filePattern);
 
   // Our default compiler options. Individual tests can override these.
   var defaultOptions = ['--no-source-map', '--no-summarize'];
   var compilerArgParser = CompilerOptions.addArguments(new ArgParser());
 
@@ skipping 284 matching lines @@
 /// Simplified from ParseDartTask.resolveDirective.
 String _resolveDirective(UriBasedDirective directive) {
   StringLiteral uriLiteral = directive.uri;
   String uriContent = uriLiteral.stringValue;
   if (uriContent != null) {
     uriContent = uriContent.trim();
     directive.uriContent = uriContent;
   }
   return directive.validate() == null ? uriContent : null;
 }