Multi-dimension rappor metrics

components/rappor/rappor_parameters.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_RAPPOR_RAPPOR_PARAMETERS_H_
 #define COMPONENTS_RAPPOR_RAPPOR_PARAMETERS_H_
 
 #include <string>
 
 namespace rappor {
@@ skipping 30 matching lines @@
   // The number of cohorts to divide the reports for this metric into.
   // This should divide kMaxCohorts evenly so that each cohort has an equal
   // probability of being assigned users.
   int num_cohorts;
 
   // The number of bytes stored in the Bloom filter.
   int bloom_filter_size_bytes;
   // The number of hash functions used in the Bloom filter.
   int bloom_filter_hash_function_count;
 
+  // The number of flag bytes this metric contains.
+  int flag_bytes;
+
   // The probability that a bit will be redacted with fake data.
   Probability fake_prob;
   // The probability that a fake bit will be a one.
   Probability fake_one_prob;
 
   // The probability that a one bit in the redacted data reports as one.
   Probability one_coin_prob;
   // The probability that a zero bit in the redacted data reports as one.
   Probability zero_coin_prob;
 
   // The reporting level this metric is reported at.
   RecordingLevel recording_level;
 };
 
 }  // namespace rappor
 
 #endif  // COMPONENTS_RAPPOR_RAPPOR_PARAMETERS_H_