Domain Reliability: Add was_proxied field to beacons.

components/domain_reliability/beacon.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_DOMAIN_RELIABILITY_BEACON_H_
 #define COMPONENTS_DOMAIN_RELIABILITY_BEACON_H_
 
 #include <string>
 
 #include "base/time/time.h"
@@ skipping 21 matching lines @@
   // The domain that the beacon is reporting on, if included.
   std::string domain;
   // The resource name that the beacon is reporting on, if included.
   std::string resource;
   // Status string (e.g. "ok", "dns.nxdomain", "http.403").
   std::string status;
   // Net error code.  Encoded as a string in the final JSON.
   int chrome_error;
   // IP address of the server the request went to.
   std::string server_ip;
+  // Whether the request went through a proxy. If true, |server_ip| will be
+  // empty.
+  bool was_proxied;
   // Protocol used to make the request.
   std::string protocol;
   // HTTP response code returned by the server, or -1 if none was received.
   int http_response_code;
   // Elapsed time between starting and completing the request.
   base::TimeDelta elapsed;
   // Start time of the request.  Encoded as the request age in the final JSON.
   base::TimeTicks start_time;
 
   // Okay to copy and assign.
 };
 
 }  // namespace domain_reliability
 
 #endif  // COMPONENTS_DOMAIN_RELIABILITY_BEACON_H_