Incremental compilation handles indirectly instantiated classes.

dart/tests/try/web/incremental_compilation_update_test.dart

 // Copyright (c) 2014, 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.
 
 library trydart.incremental_compilation_update_test;
 
 import 'dart:html' hide
     Element;
 
 import 'dart:async' show
@@ skipping 1272 matching lines @@
     normal = 'v1';
   } else {
     normal = '';
   }
   foo();
 }
 """,
             const <String>['v2', 'lazy']),
     ],
 */
+
+    // Test that superclasses of directly instantiated classes are also
+    // emitted.
+    const <ProgramResult>[
+        const ProgramResult(
+            r"""
+class A {
+}
+
+class B extends A {
+}
+
+main() {
+  print('v1');
+}
+""",
+            const <String>['v1']),
+        const ProgramResult(
+            r"""
+class A {
+}
+
+class B extends A {
+}
+
+main() {
+  new B();
+  print('v2');
+}
+""",
+            const <String>['v2']),
+    ],
+
+    // Test that interceptor classes are handled correctly.
+    const <ProgramResult>[
+        const ProgramResult(
+            r"""
+main() {
+  // TODO(ahe): Remove next line when new constants are handled correctly.
+  [].map(null);
+  print('v1');
+}
+""",
+            const <String>['v1']),
+        const ProgramResult(
+            r"""
+main() {
+  // TODO(ahe): Use forEach(print) when closures are computed correctly.
+  ['v2'].forEach((e) { print(e); });
+}
+""",
+            const <String>['v2']),
+    ],
 ];
 
 void main() {
   listener.start();
 
   document.head.append(lineNumberStyle());
 
   String query = window.location.search;
   int skip = 0;
   if (query != null && query.length > 1) {
@@ skipping 62 matching lines @@
                       program.code, test.incrementalCompiler.mainApp,
                       test.incrementalCompiler.compiler).run();
                 });
           });
         });
       });
     });
   }).then((_) {
     status.style.color = 'limegreen';
 
-    // Remove the iframe to work around a bug in test.dart.
+    // Remove the iframe and status to work around a bug in test.dart
+    // (https://code.google.com/p/dart/issues/detail?id=21691).
+    status.remove();
     iframe.remove();
   });
 }
 
 class SerializeScopeTestCase extends CompilerTestCase {
   final String scopeInfo;
 
   SerializeScopeTestCase(
       String source,
       LibraryElement library,
@@ skipping 81 matching lines @@
   position: absolute;
   left: 0px;
   width: 3em;
   text-align: right;
   background-color: lightgoldenrodyellow;
 }
 ''');
   style.type = 'text/css';
   return style;
 }