Migrated test block 27 to Dart 2.0.

tests/corelib_2/string_base_vm_test.dart

Index: tests/corelib_2/string_base_vm_test.dart
diff --git a/tests/corelib/string_base_vm_test.dart b/tests/corelib_2/string_base_vm_test.dart
similarity index 87%
rename from tests/corelib/string_base_vm_test.dart
rename to tests/corelib_2/string_base_vm_test.dart
index 76ff9ade8fe80b267e0e5b6e0110bd0b4386658a..10ed9ac44496291590efceb973e61f51213589fe 100644
--- a/tests/corelib/string_base_vm_test.dart
+++ b/tests/corelib_2/string_base_vm_test.dart
@@ -34,15 +34,6 @@ class StringBaseTest {
       a[i] = s.codeUnitAt(i);
       ga.add(s.codeUnitAt(i));
     }
-    try {
-      String s4 = new String.fromCharCodes([0.0]);
-    } on ArgumentError catch (ex) {
-      exception_caught = true;
-    } on TypeError catch (ex) {
-      exception_caught = true;
-    }
-    Expect.equals(true, exception_caught);
-    exception_caught = false;
     try {
       String s4 = new String.fromCharCodes([-1]);
     } on ArgumentError catch (ex) {