Don't rely on SSL cipher fallback in proxy auth.

net/http/http_proxy_client_socket_wrapper.h

 // Copyright 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.
 
 #ifndef NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_WRAPPER_H_
 #define NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_WRAPPER_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 163 matching lines @@
 
   TransportClientSocketPool* const transport_pool_;
   SSLClientSocketPool* const ssl_pool_;
   const scoped_refptr<TransportSocketParams> transport_params_;
   const scoped_refptr<SSLSocketParams> ssl_params_;
 
   const std::string user_agent_;
   const HostPortPair endpoint_;
   SpdySessionPool* const spdy_session_pool_;
 
+  bool has_restarted_;
   const bool tunnel_;
   ProxyDelegate* const proxy_delegate_;
 
   bool using_spdy_;
   NextProto negotiated_protocol_;
 
   std::unique_ptr<HttpResponseInfo> error_response_info_;
 
   std::unique_ptr<ClientSocketHandle> transport_socket_handle_;
   std::unique_ptr<ProxyClientSocket> transport_socket_;
@@ skipping 13 matching lines @@
 
   // Time when the connection to the proxy was started.
   base::TimeTicks connect_start_time_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpProxyClientSocketWrapper);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_WRAPPER_H_