Add embedder-specific headers to HTTP CONNECT tunnel request

net/http/http_proxy_client_socket.h

 // Copyright (c) 2012 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_H_
 #define NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_H_
 
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "net/base/completion_callback.h"
 #include "net/base/host_port_pair.h"
 #include "net/base/load_timing_info.h"
 #include "net/base/net_log.h"
 #include "net/http/http_auth_controller.h"
 #include "net/http/http_request_headers.h"
 #include "net/http/http_request_info.h"
 #include "net/http/http_response_info.h"
 #include "net/http/proxy_client_socket.h"
@@ skipping 19 matching lines @@
   HttpProxyClientSocket(ClientSocketHandle* transport_socket,
                         const GURL& request_url,
                         const std::string& user_agent,
                         const HostPortPair& endpoint,
                         const HostPortPair& proxy_server,
                         HttpAuthCache* http_auth_cache,
                         HttpAuthHandlerFactory* http_auth_handler_factory,
                         bool tunnel,
                         bool using_spdy,
                         NextProto protocol_negotiated,
+                        const base::Callback<void(
+                            const HostPortPair&, HttpRequestHeaders*)>&
+                                before_proxy_tunnel_request_callback,
                         bool is_https_proxy);
 
   // On destruction Disconnect() is called.
   virtual ~HttpProxyClientSocket();
 
   // ProxyClientSocket implementation.
   virtual const HttpResponseInfo* GetConnectResponseInfo() const OVERRIDE;
   virtual HttpStream* CreateConnectResponseStream() OVERRIDE;
   virtual int RestartWithAuth(const CompletionCallback& callback) OVERRIDE;
   virtual const scoped_refptr<HttpAuthController>& GetAuthController() const
@@ skipping 96 matching lines @@
   // If true, then SSL is used to communicate with this proxy
   const bool is_https_proxy_;
 
   std::string request_line_;
   HttpRequestHeaders request_headers_;
 
   // Used only for redirects.
   bool redirect_has_load_timing_info_;
   LoadTimingInfo redirect_load_timing_info_;
 
+  const HostPortPair proxy_server_;
+  base::Callback<void(const HostPortPair&, HttpRequestHeaders*)>
+      before_proxy_tunnel_request_callback_;
+
   const BoundNetLog net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpProxyClientSocket);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_H_