Add a command line flag to change the default number of parallel DNS requests...

net/socket/tcp_client_socket_unittest.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/socket/tcp_client_socket.h"
 
 #include "base/basictypes.h"
 #include "net/base/address_list.h"
 #include "net/base/host_resolver.h"
 #include "net/base/io_buffer.h"
@@ skipping 71 matching lines @@
   for (port = kMinPort; port < kMaxPort; port++) {
     sock = ListenSocket::Listen("127.0.0.1", port, this);
     if (sock)
       break;
   }
   ASSERT_TRUE(sock != NULL);
   listen_sock_ = sock;
   listen_port_ = port;
 
   AddressList addr;
-  scoped_refptr<HostResolver> resolver(CreateSystemHostResolver());
+  scoped_refptr<HostResolver> resolver(
+      CreateSystemHostResolver(HostResolver::kDefaultParallelism));
   HostResolver::RequestInfo info("localhost", listen_port_);
   int rv = resolver->Resolve(info, &addr, NULL, NULL, BoundNetLog());
   CHECK_EQ(rv, OK);
   sock_.reset(new TCPClientSocket(addr, &net_log_));
 }
 
 TEST_F(TCPClientSocketTest, Connect) {
   TestCompletionCallback callback;
   EXPECT_FALSE(sock_->IsConnected());
 
@@ skipping 235 matching lines @@
   // Close the server socket, so there will at least be a 0-byte read.
   CloseServerSocket();
 
   rv = callback.WaitForResult();
   EXPECT_GE(rv, 0);
 }
 
 }  // namespace
 
 }  // namespace net