Change new List(n) to return fixed length list.

tests/standalone/io/raw_secure_server_socket_test.dart

Index: tests/standalone/io/raw_secure_server_socket_test.dart
diff --git a/tests/standalone/io/raw_secure_server_socket_test.dart b/tests/standalone/io/raw_secure_server_socket_test.dart
index 73609ae12d92f342808f92526f93ffd6bb9f4dae..258a0ea42285c96d0e7fe710fd4f259d8a103acb 100644
--- a/tests/standalone/io/raw_secure_server_socket_test.dart
+++ b/tests/standalone/io/raw_secure_server_socket_test.dart
@@ -143,7 +143,7 @@ void testSimpleReadWrite() {
   const messageSize = 1000;
 
   List<int> createTestData() {
-    List<int> data = new List.fixedLength(messageSize);
+    List<int> data = new List<int>(messageSize);
     for (int i = 0; i < messageSize; i++) {
       data[i] = i & 0xff;
     }
@@ -162,7 +162,7 @@ void testSimpleReadWrite() {
     server.listen((client) {
       int bytesRead = 0;
       int bytesWritten = 0;
-      List<int> data = new List.fixedLength(messageSize);
+      List<int> data = new List<int>(messageSize);
 
       client.writeEventsEnabled = false;
       client.listen((event) {
@@ -212,7 +212,7 @@ void testSimpleReadWrite() {
       int bytesRead = 0;
       int bytesWritten = 0;
       List<int> dataSent = createTestData();
-      List<int> dataReceived = new List<int>.fixedLength(dataSent.length);
+      List<int> dataReceived = new List<int>(dataSent.length);
       socket.listen((event) {
         switch (event) {
           case RawSocketEvent.READ: