Incremental compilation of added class.

dart/tests/try/web/incremental_compilation_update_test.dart

Index: dart/tests/try/web/incremental_compilation_update_test.dart
diff --git a/dart/tests/try/web/incremental_compilation_update_test.dart b/dart/tests/try/web/incremental_compilation_update_test.dart
index 9ecd92b39cd097b731b42f98c6d311448297ea65..5484f884600926fe40b3afe1e91ca13f70696f6c 100644
--- a/dart/tests/try/web/incremental_compilation_update_test.dart
+++ b/dart/tests/try/web/incremental_compilation_update_test.dart
@@ -789,6 +789,30 @@ main() {
 """,
             const <String>['v2']),
     ],
+
+    // Test that adding a class is supported.
+    const <ProgramResult>[
+        const ProgramResult(
+            r"""
+main() {
+  print('v1');
+}
+""",
+            const <String>['v1']),
+        const ProgramResult(
+            r"""
+class C {
+  void foo() {
+    print('v2');
+  }
+}
+
+main() {
+  new C().foo();
+}
+""",
+            const <String>['v2']),
+    ],
 ];
 
 void main() {