Add support for speaking SPDY to an HTTPS proxy....

net/http/http_proxy_client_socket.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 NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_H_
 #define NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_H_
 #pragma once
 
 #include <string>
 
@@ skipping 21 matching lines @@
  public:
   // Takes ownership of |transport_socket|, which should already be connected
   // by the time Connect() is called.  If tunnel is true then on Connect()
   // this socket will establish an Http tunnel.
   HttpProxyClientSocket(ClientSocketHandle* transport_socket,
                         const GURL& request_url,
                         const std::string& user_agent,
                         const HostPortPair& endpoint,
                         const HostPortPair& proxy_server,
                         const scoped_refptr<HttpNetworkSession>& session,
-                        bool tunnel);
+                        bool tunnel,
+                        bool using_spdy);
 
   // On destruction Disconnect() is called.
   virtual ~HttpProxyClientSocket();
 
   // If Connect (or its callback) returns PROXY_AUTH_REQUESTED, then
   // credentials should be added to the HttpAuthController before calling
   // RestartWithAuth.
   int RestartWithAuth(CompletionCallback* callback);
 
   const HttpResponseInfo* GetResponseInfo() const {
     return response_.headers ? &response_ : NULL;
   }
 
   const scoped_refptr<HttpAuthController>& auth_controller() {
     return auth_;
   }
 
+  bool using_spdy() {
+    return using_spdy_;
+  }
+
   // ClientSocket methods:
 
   // Authenticates to the Http Proxy and then passes data freely.
   virtual int Connect(CompletionCallback* callback);
   virtual void Disconnect();
   virtual bool IsConnected() const;
   virtual bool IsConnectedAndIdle() const;
   virtual const BoundNetLog& NetLog() const { return net_log_; }
   virtual void SetSubresourceSpeculation();
   virtual void SetOmniboxSpeculation();
@@ skipping 63 matching lines @@
   scoped_refptr<IOBuffer> drain_buf_;
 
   // Stores the underlying socket.
   const scoped_ptr<ClientSocketHandle> transport_;
 
   // The hostname and port of the endpoint.  This is not necessarily the one
   // specified by the URL, due to Alternate-Protocol or fixed testing ports.
   const HostPortPair endpoint_;
   scoped_refptr<HttpAuthController> auth_;
   const bool tunnel_;
+  // If true, then the connection to the proxy is a SPDY connection.
+  const bool using_spdy_;
 
   std::string request_headers_;
 
   const BoundNetLog net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpProxyClientSocket);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_H_