Remove List.filled constructor.

pkg/serialization/test/serialization_test.dart

Index: pkg/serialization/test/serialization_test.dart
diff --git a/pkg/serialization/test/serialization_test.dart b/pkg/serialization/test/serialization_test.dart
index 9279ffa384b1b4061eac3681335582d0a3005254..33247ae054f2fed18f45058853e3ab0584f3c949 100644
--- a/pkg/serialization/test/serialization_test.dart
+++ b/pkg/serialization/test/serialization_test.dart
@@ -515,7 +515,12 @@ Reader setUpReader(aSerialization, sampleData) {
   var reader = new Reader(aSerialization);
   // We're not sure which rule needs the sample data, so put it everywhere
   // and trust that the extra will just be ignored.
-  reader.data = new List.filled(10, [sampleData]);
+  var fillValue = [sampleData];
+  var data = [];
+  for (int i = 0; i < 10; i++) {
+    data.add(fillValue);
+  }
+  reader.data = data;
   return reader;
 }
 
@@ -648,4 +653,4 @@ class NodeRule extends CustomRule {
     node.parent = state[0];
     node.children = state[2];
   }
-}
+}