Moved XMPP notifier library from chrome/browser/sync to chrome/common....

chrome/browser/sync/notifier/base/async_dns_lookup.h

-// 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.
-
-#ifndef CHROME_BROWSER_SYNC_NOTIFIER_BASE_ASYNC_DNS_LOOKUP_H_
-#define CHROME_BROWSER_SYNC_NOTIFIER_BASE_ASYNC_DNS_LOOKUP_H_
-
-#include <vector>
-
-#include "base/scoped_ptr.h"
-#include "talk/base/signalthread.h"
-
-namespace talk_base {
-class SocketAddress;
-class Task;
-}
-
-namespace notifier {
-
-class AsyncDNSLookup : public talk_base::SignalThread {
- public:
-  explicit AsyncDNSLookup(const talk_base::SocketAddress& server);
-  virtual ~AsyncDNSLookup();
-
-  int error() const {
-    return error_;
-  }
-
-  const std::vector<uint32>& ip_list() const {
-    return ip_list_;
-  }
-
- protected:
-  // SignalThread Interface.
-  virtual void DoWork();
-  virtual void OnMessage(talk_base::Message* message);
-
- private:
-  void OnTimeout();
-
-  scoped_ptr<talk_base::SocketAddress> server_;
-  talk_base::CriticalSection cs_;
-  int error_;
-  std::vector<uint32> ip_list_;
-
-  DISALLOW_COPY_AND_ASSIGN(AsyncDNSLookup);
-};
-
-}  // namespace notifier
-
-#endif  // CHROME_BROWSER_SYNC_NOTIFIER_BASE_ASYNC_DNS_LOOKUP_H_