Add embedder-specific headers to HTTP CONNECT tunnel request

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 a2682c505b111792d9a4f07cc5f7657023e93765..6761621098383a72f37e216d6882281be95cd43a 100644
--- a/net/http/http_proxy_client_socket.h
+++ b/net/http/http_proxy_client_socket.h
@@ -31,6 +31,7 @@ class HttpAuthCache;
 class HttpStream;
 class HttpStreamParser;
 class IOBuffer;
+class ProxyDelegate;
 
 class HttpProxyClientSocket : public ProxyClientSocket {
  public:
@@ -47,6 +48,7 @@ class HttpProxyClientSocket : public ProxyClientSocket {
                         bool tunnel,
                         bool using_spdy,
                         NextProto protocol_negotiated,
+                        ProxyDelegate* proxy_delegate,
                         bool is_https_proxy);
 
   // On destruction Disconnect() is called.
@@ -163,6 +165,11 @@ class HttpProxyClientSocket : public ProxyClientSocket {
   bool redirect_has_load_timing_info_;
   LoadTimingInfo redirect_load_timing_info_;
 
+  const HostPortPair proxy_server_;
+
+  // This delegate must outlive this proxy client socket.
+  ProxyDelegate* proxy_delegate_;
+
   const BoundNetLog net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpProxyClientSocket);