Bypass DRP if a redirect cycle is detected

components/data_reduction_proxy/core/browser/data_reduction_proxy_bypass_stats.h

 // Copyright 2014 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 COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_BYPASS_STATS_H_
 #define COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_BYPASS_STATS_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
@@ skipping 27 matching lines @@
       bool is_primary,
       bool bypass_all,
       const net::ProxyServer& proxy_server,
       DataReductionProxyBypassType bypass_type);
 
   // For the given response |headers| that are expected to include the data
   // reduction proxy via header, records response code UMA if the data reduction
   // proxy via header is not present.
   static void DetectAndRecordMissingViaHeaderResponseCode(
       bool is_primary,
-      const net::HttpResponseHeaders* headers);
+      const net::HttpResponseHeaders& headers);
 
   // |config| outlives this class instance. |unreachable_callback| provides a
   // hook to inform the user that the Data Reduction Proxy is unreachable.
   // |config| must not be null.
   DataReductionProxyBypassStats(
       DataReductionProxyConfig* config,
       UnreachableCallback unreachable_callback);
 
   ~DataReductionProxyBypassStats() override;
 
@@ skipping 100 matching lines @@
   bool unavailable_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(DataReductionProxyBypassStats);
 };
 
 }  // namespace data_reduction_proxy
 
 #endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_BYPASS_STATS_H_