Allow chrome to handle 407 auth challenges to CONNECT requests

net/http/http_proxy_utils.h

Index: net/http/http_proxy_utils.h
===================================================================
--- net/http/http_proxy_utils.h	(revision 118888)
+++ net/http/http_proxy_utils.h	(working copy)
@@ -10,6 +10,9 @@
 
 namespace net {
 
+class BoundNetLog;
+class HttpAuthController;
+class HttpResponseInfo;
 struct HttpRequestInfo;
 class HttpRequestHeaders;
 class HostPortPair;
@@ -23,6 +26,12 @@
                         std::string* request_line,
                         HttpRequestHeaders* request_headers);
 
+// When an auth challenge (407 response) is received during tunnel construction
+// this method should be called.
+int HandleAuthChallenge(HttpAuthController* auth,
+                        HttpResponseInfo* response,
+                        const BoundNetLog& net_log);
+
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_PROXY_UTILS_H_