Refactor List.setRange function.

tests/standalone/io/raw_secure_server_socket_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 //
 // VMOptions=
 // VMOptions=--short_socket_read
 // VMOptions=--short_socket_write
 // VMOptions=--short_socket_read --short_socket_write
 
 import "package:expect/expect.dart";
@@ skipping 155 matching lines @@
       List<int> data = new List<int>(messageSize);
 
       client.writeEventsEnabled = false;
       client.listen((event) {
         switch (event) {
           case RawSocketEvent.READ:
             Expect.isTrue(bytesWritten == 0);
             Expect.isTrue(client.available() > 0);
             var buffer = client.read();
             if (buffer != null) {
-              data.setRange(bytesRead, buffer.length, buffer);
+              data.setRange(bytesRead, bytesRead + buffer.length, buffer);
               bytesRead += buffer.length;
               for (var value in buffer) {
                 Expect.isTrue(value is int);
                 Expect.isTrue(value < 256 && value >= 0);
               }
             }
             if (bytesRead == data.length) {
               verifyTestData(data);
               client.writeEventsEnabled = true;
             }
@@ skipping 26 matching lines @@
       int bytesRead = 0;
       int bytesWritten = 0;
       List<int> dataSent = createTestData();
       List<int> dataReceived = new List<int>(dataSent.length);
       socket.listen((event) {
         switch (event) {
           case RawSocketEvent.READ:
             Expect.isTrue(socket.available() > 0);
             var buffer = socket.read();
             if (buffer != null) {
-              dataReceived.setRange(bytesRead, buffer.length, buffer);
+              int endIndex = bytesRead + buffer.length;
+              dataReceived.setRange(bytesRead, endIndex, buffer);
               bytesRead += buffer.length;
             }
             break;
           case RawSocketEvent.WRITE:
             Expect.isTrue(bytesRead == 0);
             Expect.isFalse(socket.writeEventsEnabled);
             bytesWritten += socket.write(
                 dataSent, bytesWritten, dataSent.length - bytesWritten);
             if (bytesWritten < dataSent.length) {
               socket.writeEventsEnabled = true;
@@ skipping 20 matching lines @@
   testArguments();
   testSimpleBind();
   testInvalidBind();
   testSimpleConnect(CERTIFICATE);
   testSimpleConnect("CN=localhost");
   testSimpleConnectFail("not_a_nickname");
   testSimpleConnectFail("CN=notARealDistinguishedName");
   testServerListenAfterConnect();
   testSimpleReadWrite();
 }