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diff --git a/chrome/browser/net/preconnect.h b/chrome/browser/net/preconnect.h
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+++ b/chrome/browser/net/preconnect.h
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+// Copyright (c) 2006-2010 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.
+
+// A Preconnect instance maintains state while a TCP/IP connection is made, and
+// and then released into the pool of available connections for future use.
+
+#ifndef CHROME_BROWSER_NET_PRECONNECT_H_
+#define CHROME_BROWSER_NET_PRECONNECT_H_
+
+#include "base/ref_counted.h"
+#include "net/base/completion_callback.h"
+#include "net/base/host_port_pair.h"
+#include "net/socket/client_socket_handle.h"
+#include "net/socket/tcp_client_socket_pool.h"
+#include "net/url_request/url_request_context.h"
+
+namespace chrome_browser_net {
+
+class Preconnect : public net::CompletionCallback {
+ public:
+  static bool PreconnectOnUIThread(const GURL& url);
+
+  static void PreconnectOnIOThread(const GURL& url);
+
+  static void SetPreconnectDespiteProxy(bool status) {
+    preconnect_despite_proxy_ = status;
+  }
+
+ private:
+  Preconnect() {}
+
+  // Supply an instance that could have been used in an IO callback, but will
+  // never actually be used (because we reset the connection so quickly).
+  static Preconnect* callback_instance_;
+
+  // IO Callback which whould be performed when the connection is established.
+  virtual void RunWithParams(const Tuple1<int>& params);
+
+  // Preconnections are currently conservative, and do nothing if there is a
+  // chance that a proxy may be used.  This boolean allows proxy settings to
+  // be ignored (presumably because a user knows that the proxy won't be doing
+  // much work anway).
+  static bool preconnect_despite_proxy_;
+
+  DISALLOW_COPY_AND_ASSIGN(Preconnect);
+};
+}  // chrome_browser_net
+
+#endif  // CHROME_BROWSER_NET_PRECONNECT_H_