Implement modular compilation

test/samples/trusttypes1.dart

Index: test/samples/trusttypes1.dart
diff --git a/test/samples/trusttypes1.dart b/test/samples/trusttypes1.dart
deleted file mode 100644
index 86bd39b64dccaccb119d4a3e522bca94f77a1d40..0000000000000000000000000000000000000000
--- a/test/samples/trusttypes1.dart
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright (c) 2015, 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:math';
-
-class A {
-  int x = 42;
-}
-void bar(A a) {
-  // Is this integer addition?
-  print(a.x + a.x);
-}
-
-void main() {
-  Map<A, Function> map = <A, Function>{
-    new A(): bar,
-    new B(new Point<int>(1, 2)): print,
-  };
-  map.forEach((A a, Function f) => f(a));
-}
-
-class B extends A {
-  var _x;
-  B(this._x);
-
-  get x => _x;
-}