Disable SSL session cache to fix issue with SecureSocket connections.

tests/standalone/io/secure_session_resume_test.dart

 // Copyright (c) 2012, 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.
 
+// This test tests TLS session resume, by making multiple client connections
+// on the same port to the same server, with a delay of 200 ms between them.
+// The unmodified secure_server_test creates all sessions simultaneously,
+// which means that no handshake completes and caches its keys in the session
+// cache in time for other connections to use it.
+//
+// Session resume is currently disabled - see issue
+// https://code.google.com/p/dart/issues/detail?id=7230
+
 import "dart:io";
 import "dart:isolate";
 
 const SERVER_ADDRESS = "127.0.0.1";
 const HOST_NAME = "localhost";
 
 void WriteAndClose(Socket socket, String message) {
   var data = message.charCodes;
   int written = 0;
   void write() {
@@ skipping 72 matching lines @@
   static int numReplies = 0;
 
   int port;
   String name;
   SecureSocket socket;
   String reply;
 }
 
 Function EndTest;
 
-const CLIENT_NAMES = const ['able', 'baker', 'camera', 'donut', 'echo'];
+const CLIENT_NAMES = const ['able', 'baker'];
 
 void main() {
   ReceivePort keepAlive = new ReceivePort();
   Path scriptDir = new Path.fromNative(new Options().script).directoryPath;
   Path certificateDatabase = scriptDir.append('pkcert');
   SecureSocket.initialize(database: certificateDatabase.toNativePath(),
-                          password: 'dartdart');
+                          password: 'dartdart',
+                          useBuiltinRoots: false);
 
   var server = new SecureTestServer();
   int port = server.start();
 
   EndTest = () {
     Expect.equals(CLIENT_NAMES.length, server.numConnections);
     server.stop();
     keepAlive.close();
   };
 
+  int delay = 0;
+  int delay_between_connections = 300;  // Milliseconds.
+
   for (var x in CLIENT_NAMES) {
-    new SecureTestClient(port, x);
+    new Timer(delay, (_) {
+      new SecureTestClient(port, x);
+    });
+    delay += delay_between_connections;
   }
 }