Remove the confusing request_url argument from the constructors

net/http/http_proxy_client_socket.h

Index: net/http/http_proxy_client_socket.h
diff --git a/net/http/http_proxy_client_socket.h b/net/http/http_proxy_client_socket.h
index bdd79e01c57be7376c25573cb168678ec01d3139..cc82c575d18e3c588b000d15c7de90258b7d9c20 100644
--- a/net/http/http_proxy_client_socket.h
+++ b/net/http/http_proxy_client_socket.h
@@ -20,8 +20,6 @@
 #include "net/log/net_log.h"
 #include "net/socket/ssl_client_socket.h"
 
-class GURL;
-
 namespace net {
 
 class AddressList;
@@ -39,7 +37,6 @@ class HttpProxyClientSocket : public ProxyClientSocket {
   // 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,