Make the simple QUIC client able to resolve hosts.

net/tools/quic/synchronous_host_resolver.h

+// Copyright (c) 2015 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.
+//
+// A simple class for resolving hostname synchronously.
+
+#ifndef NET_TOOLS_QUIC_SYNCHRONOUS_HOST_RESOLVER_H_
+#define NET_TOOLS_QUIC_SYNCHRONOUS_HOST_RESOLVER_H_
+
+#include "net/base/address_list.h"
+#include "net/base/net_export.h"
+#include "net/dns/host_resolver.h"
+
+namespace net {
+
+namespace tools {
+
+class SynchronousHostResolver {
+ public:
+  static int Resolve(const std::string& host, AddressList* addresses);
+};
+
+}  // namespace tools
+}  // namespace net
+
+#endif  // NET_TOOLS_QUIC_SYNCHRONOUS_HOST_RESOLVER_H_