[net] Switch TestURLRequestContext to use MockCachingHostResolver.

net/socket/transport_client_socket_unittest.cc

 // Copyright (c) 2012 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 "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "net/base/address_list.h"
-#include "net/base/host_resolver.h"
 #include "net/base/io_buffer.h"
+#include "net/base/mock_host_resolver.h"
 #include "net/base/net_log.h"
 #include "net/base/net_log_unittest.h"
 #include "net/base/net_errors.h"
 #include "net/base/tcp_listen_socket.h"
 #include "net/base/test_completion_callback.h"
 #include "net/base/winsock_init.h"
 #include "net/socket/client_socket_factory.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
@@ skipping 92 matching lines @@
   for (port = kMinPort; port < kMaxPort; port++) {
     sock = TCPListenSocket::CreateAndListen("127.0.0.1", port, this);
     if (sock.get())
       break;
   }
   ASSERT_TRUE(sock != NULL);
   listen_sock_ = sock;
   listen_port_ = port;
 
   AddressList addr;
-  scoped_ptr<HostResolver> resolver(
-      CreateSystemHostResolver(HostResolver::kDefaultParallelism,
-                               HostResolver::kDefaultRetryAttempts,
-                               NULL));
+  // MockHostResolver resolves everything to 127.0.0.1.
+  scoped_ptr<HostResolver> resolver(new MockHostResolver());
   HostResolver::RequestInfo info(HostPortPair("localhost", listen_port_));
   TestCompletionCallback callback;
   int rv = resolver->Resolve(info, &addr, callback.callback(), NULL,
                              BoundNetLog());
   CHECK_EQ(ERR_IO_PENDING, rv);
   rv = callback.WaitForResult();
   CHECK_EQ(rv, OK);
   sock_.reset(
       socket_factory_->CreateTransportClientSocket(addr,
                                                    &net_log_,
@@ skipping 303 matching lines @@
 
   // It's possible the read is blocked because it's already read all the data.
   // Close the server socket, so there will at least be a 0-byte read.
   CloseServerSocket();
 
   rv = callback.WaitForResult();
   EXPECT_GE(rv, 0);
 }
 
 }  // namespace net