Revert recent changes to indexeddb_4_test.

tests/html/indexeddb_4_test.dart

Index: tests/html/indexeddb_4_test.dart
diff --git a/tests/html/indexeddb_4_test.dart b/tests/html/indexeddb_4_test.dart
index 3303677bb8e505ba39454d55bdead1ab8d29159d..4bd2fd04cfe0324212637d41cc9dbdad12de45e8 100644
--- a/tests/html/indexeddb_4_test.dart
+++ b/tests/html/indexeddb_4_test.dart
@@ -63,15 +63,15 @@ class Test {
     IDBObjectStore objectStore = txn.objectStore(STORE_NAME);
     IDBRequest cursorRequest = objectStore.openCursor(range);
     int itemCount = 0;
-    num firstKey = null;
-    num lastKey = null;
+    int firstKey = null;
+    int lastKey = null;
     cursorRequest.on.success.add(expectAsync1((e) {
       var cursor = e.target.result;
       if (cursor != null) {
         if (firstKey == null) firstKey = cursor.key;
         lastKey = cursor.key;
         itemCount += 1;
-        Expect.equals('Item ${cursor.key.toStringAsFixed(0)}', cursor.value);
+        Expect.equals('Item ${cursor.key}', cursor.value);
         cursor.continueFunction();
       } else {
         // Done