Take noSuchMethod into account when computing the potential targets of a call.

tests/language/no_such_method3_test.dart

+// Copyright (c) 2013, 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.
+
+// Test that a static type inferrer takes [noSuchMethod] into account.
+
+import "package:expect/expect.dart";
+
+class A {
+  B foobarbaz() {
+    return new B();
+  }
+}
+
+class B {
+  noSuchMethod(im) {
+    return 42;
+  }
+}
+
+bar() {
+  var b;
+  for (int i = 0; i < 500; ++i)
+    if (i % 2 == 0)
+      b = new A();
+    else
+      b = new B();
+  return b;
+}
+
+void main() {
+  var x = bar();
+  var y = x.foobarbaz();
+  Expect.equals(42, y);
+  Expect.isFalse(y is B);
+}