Update tests.

tests/compiler/dart2js/class_codegen_test.dart

Index: tests/compiler/dart2js/class_codegen_test.dart
diff --git a/tests/compiler/dart2js/class_codegen_test.dart b/tests/compiler/dart2js/class_codegen_test.dart
index d2af8f727fd3ca5a9f7690c0c566ee959eff6b49..13c21f040681c35f768c72d718d09f2277f6c10b 100644
--- a/tests/compiler/dart2js/class_codegen_test.dart
+++ b/tests/compiler/dart2js/class_codegen_test.dart
@@ -67,15 +67,15 @@ main() {
 
 twoClasses() {
   asyncTest(() => compileAll(TEST_ONE).then((generated) {
-    Expect.isTrue(generated.contains(new RegExp('A: {[ \n]*"": "Object;"')));
-    Expect.isTrue(generated.contains(new RegExp('B: {[ \n]*"": "Object;"')));
+    Expect.isTrue(generated.contains(new RegExp('A: {[ \n]*"\\^": "Object;"')));
+    Expect.isTrue(generated.contains(new RegExp('B: {[ \n]*"\\^": "Object;"')));
   }));
 }
 
 subClass() {
   checkOutput(String generated) {
-    Expect.isTrue(generated.contains(new RegExp('A: {[ \n]*"": "Object;"')));
-    Expect.isTrue(generated.contains(new RegExp('B: {[ \n]*"": "A;"')));
+    Expect.isTrue(generated.contains(new RegExp('A: {[ \n]*"\\^": "Object;"')));
+    Expect.isTrue(generated.contains(new RegExp('B: {[ \n]*"\\^": "A;"')));
   }
 
   asyncTest(() => compileAll(TEST_TWO).then(checkOutput));
@@ -85,7 +85,7 @@ subClass() {
 fieldTest() {
   asyncTest(() => compileAll(TEST_FOUR).then((generated) {
     Expect.isTrue(generated.contains(
-        new RegExp('B: {[ \n]*"": "A;y,z,x",[ \n]*static:')));
+        new RegExp('B: {[ \n]*"\\^": "A;y,z,x",[ \n]*static:')));
   }));
 }