Adjust IDB test to work for JS as well.

tests/html/indexeddb_1_test.dart

Index: tests/html/indexeddb_1_test.dart
diff --git a/tests/html/indexeddb_1_test.dart b/tests/html/indexeddb_1_test.dart
index eda0ee6e94fe12315396b668f7f1b0d7aaf98022..a099bf000830ea88fa6a739a3e295a1db82a8510 100644
--- a/tests/html/indexeddb_1_test.dart
+++ b/tests/html/indexeddb_1_test.dart
@@ -129,9 +129,6 @@ void testTypes(testFunction) {
       equals("1371854424211"), null, STORE_NAME, VERSION, true));
   test('largeDoubleConvertedToInt', testFunction(123, 1371854424211.0,
       equals("1371854424211"), null, STORE_NAME, VERSION, true));
-  // TODO(efortuna): Investigate.
-  //test('double', testFunction(123, math.pow(2, 53),
-  //    equals("9007199254740992.0"), null, STORE_NAME, VERSION, true));
   test('largeIntInMap', testFunction(123, {'time': 4503599627370492},
       equals("{time: 4503599627370492}"), null, STORE_NAME, VERSION, true));
   var now = new DateTime.now();