Delete unused classes AutoDetectProxy and SslSocketFactory.

webrtc/base/proxydetect.h

-/*
- *  Copyright 2007 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef _PROXYDETECT_H_
-#define _PROXYDETECT_H_
-
-#include "webrtc/base/proxyinfo.h"
-
-namespace rtc {
-// Auto-detect the proxy server.  Returns true if a proxy is configured,
-// although hostname may be empty if the proxy is not required for
-// the given URL.
-
-bool GetProxySettingsForUrl(const char* agent, const char* url,
-                            rtc::ProxyInfo* proxy,
-                            bool long_operation = false);
-
-}  // namespace rtc
-
-#endif  // _PROXYDETECT_H_