Fix crash due to AbstractFieldElement.computeType.

dart/tests/try/poi/data/abstract_field.dart

Index: dart/tests/try/poi/data/abstract_field.dart
diff --git a/dart/tests/try/poi/data/interesting.dart b/dart/tests/try/poi/data/abstract_field.dart
similarity index 59%
copy from dart/tests/try/poi/data/interesting.dart
copy to dart/tests/try/poi/data/abstract_field.dart
index 9f39d9d5d2eab4e0d7e6ad9be4a4c3c835fa7aa2..cc793b92dca09e8ba0732e09bd58a0762f4dc6d7 100644
--- a/dart/tests/try/poi/data/interesting.dart
+++ b/dart/tests/try/poi/data/abstract_field.dart
@@ -2,13 +2,19 @@
 // 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 interesting;
+library abstract_field;
 
-class Foo {
-  fisk() {
-  }
-  hest() {
+class A {
+  String get foo => null;
+
+  set foo(String v) => null;
+
+  method() {
   }
 }
 
+String get bar => null;
+
+set bar(String v) => null;
+
 main() {}