Bypass data reduction proxy if no handler is found for a 407 error.

net/proxy/proxy_service.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_PROXY_PROXY_SERVICE_H_
 #define NET_PROXY_PROXY_SERVICE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 274 matching lines @@
 
     // Bypass the proxy because of any other error.
     ERROR_BYPASS,
 
     // Bypass the proxy because responses appear not to be coming via it.
     MISSING_VIA_HEADER,
 
     // Bypass the proxy because the proxy, not the origin, sent a 4xx response.
     PROXY_4XX_BYPASS,
 
+    // Bypass the proxy because we got a 407 from the proxy without a challenge.
+    MALFORMED_407_BYPASS,
+
     // This must always be last.
     BYPASS_EVENT_TYPE_MAX
   };
 
   // Records a |DataReductionProxyBypassEventType| for either the data reduction
   // proxy (|is_primary| is true) or the data reduction proxy fallback.
   void RecordDataReductionProxyBypassInfo(
       bool is_primary,
       const ProxyServer& proxy_server,
       DataReductionProxyBypassEventType bypass_type) const;
@@ skipping 187 matching lines @@
 
   base::WaitableEvent event_;
   CompletionCallback callback_;
   ProxyInfo proxy_info_;
   int result_;
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_SERVICE_H_