Copy types object when using a cached compiler.

dart/tests/compiler/dart2js/message_kind_test.dart

Index: dart/tests/compiler/dart2js/message_kind_test.dart
diff --git a/dart/tests/compiler/dart2js/message_kind_test.dart b/dart/tests/compiler/dart2js/message_kind_test.dart
index b2f1e464ed798947416e396620827b2529b788b6..b3cca951ad06ea5f8b0e65e129e605ab61aa0cbf 100644
--- a/dart/tests/compiler/dart2js/message_kind_test.dart
+++ b/dart/tests/compiler/dart2js/message_kind_test.dart
@@ -48,18 +48,10 @@ main() {
   asyncTest(() => Future.forEach(examples, (String name) {
     print("Checking '$name'.");
     Stopwatch sw = new Stopwatch()..start();
-    bool useCachedCompiler = true;
-    if (name == 'MISSING_LIBRARY_NAME') {
-      // TODO(johnniwinther): Found out why we cannot use the cached compiler
-      // for this message kind.
-      cachedCompiler = null;
-    }
-    return check(kinds[name], cachedCompiler).
-        then((var compiler) {
-          cachedCompiler = compiler;
-          sw.stop();
-          print("Checked '$name' in ${sw.elapsedMilliseconds}ms.");
-        });
-    }
-  ));
+    return check(kinds[name], cachedCompiler).then((var compiler) {
+      cachedCompiler = compiler;
+      sw.stop();
+      print("Checked '$name' in ${sw.elapsedMilliseconds}ms.");
+    });
+  }));
 }