Pass RapporService to content/browser/

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 {
-
-// Levels of noise added to a sample.
-enum NoiseLevel {
-  NO_NOISE = 0,
-  NORMAL_NOISE,
-  SPARSE_NOISE,
-  NUM_NOISE_LEVELS,
-};
-
-// The type of data stored in a metric.
-// Any use of the LOW_FREQUENCY types must be approved by Chrome Privacy and
-// the rappor-dev team.
-enum RapporType {
-  // Generic metrics from UMA opt-in users.
-  UMA_RAPPOR_TYPE = 0,
-  // Generic metrics for SafeBrowsing users. Deprecated, replaced by
-  // LOW_FREQUENCY_SAFEBROWSING_RAPPOR_TYPE.
-  SAFEBROWSING_RAPPOR_TYPE,
-  // Deprecated: Use UMA_RAPPOR_TYPE for new metrics
-  ETLD_PLUS_ONE_RAPPOR_TYPE,
-  // Type for low-frequency metrics from UMA opt-in users.
-  LOW_FREQUENCY_UMA_RAPPOR_TYPE,
-  // Type for low-frequency metrics from SafeBrowsing users.
-  LOW_FREQUENCY_SAFEBROWSING_RAPPOR_TYPE,
-  // Type for low-frequency metrics from UMA opt-in users. Do not use for new
-  // metrics.
-  LOW_FREQUENCY_ETLD_PLUS_ONE_RAPPOR_TYPE,
-  NUM_RAPPOR_TYPES,
-  COARSE_RAPPOR_TYPE = SAFEBROWSING_RAPPOR_TYPE,
-};
-
-enum Probability {
-  PROBABILITY_100,   // 100%
-  PROBABILITY_75,    // 75%
-  PROBABILITY_50,    // 50%
-  PROBABILITY_25,    // 25%
-  PROBABILITY_0,     // 0%
-};
-
-
-// A metric is reported when its reporting group is in the set of groups
-// passed in to RapporService::Start()
-enum RecordingGroup {
-  // Metrics for UMA users.
-  UMA_RAPPOR_GROUP = 1 << 0,
-  // Metrics related to SafeBrowsing, for SafeBrowsing users.
-  SAFEBROWSING_RAPPOR_GROUP = 1 << 1,
-};
-
-
-// An object describing noise probabilities for a noise level
-struct NoiseParameters {
-  // The probability that a bit will be redacted with fake data. This
-  // corresponds to the F privacy parameter.
-  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. This
-  // corresponds to the Q privacy parameter
-  Probability one_coin_prob;
-  // The probability that a zero bit in the redacted data reports as one. This
-  // corresponds to the P privacy parameter.
-  Probability zero_coin_prob;
-};
-
-// An object describing a rappor metric and the parameters used to generate it.
-//
-// For a full description of the rappor metrics, see
-// http://www.chromium.org/developers/design-documents/rappor
-struct RapporParameters {
-  // Get a string representing the parameters, for DCHECK_EQ.
-  std::string ToString() const;
-
-  // The maximum number of cohorts we divide clients into.
-  static const int kMaxCohorts;
-
-  // 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.
-  size_t bloom_filter_size_bytes;
-  // The number of hash functions used in the Bloom filter.
-  int bloom_filter_hash_function_count;
-
-  // The level of noise to use.
-  NoiseLevel noise_level;
-
-  // The reporting level this metric is reported at.
-  RecordingGroup recording_group;
-};
-
-namespace internal {
-
-const NoiseParameters kNoiseParametersForLevel[NUM_NOISE_LEVELS] = {
-    // NO_NOISE
-    {
-     rappor::PROBABILITY_0 /* Fake data probability */,
-     rappor::PROBABILITY_0 /* Fake one probability */,
-     rappor::PROBABILITY_100 /* One coin probability */,
-     rappor::PROBABILITY_0 /* Zero coin probability */,
-    },
-    // NORMAL_NOISE
-    {
-     rappor::PROBABILITY_50 /* Fake data probability */,
-     rappor::PROBABILITY_50 /* Fake one probability */,
-     rappor::PROBABILITY_75 /* One coin probability */,
-     rappor::PROBABILITY_25 /* Zero coin probability */,
-    },
-    // SPARSE_NOISE
-    {
-     rappor::PROBABILITY_25 /* Fake data probability */,
-     rappor::PROBABILITY_50 /* Fake one probability */,
-     rappor::PROBABILITY_75 /* One coin probability */,
-     rappor::PROBABILITY_25 /* Zero coin probability */,
-    },
-};
-
-const RapporParameters kRapporParametersForType[NUM_RAPPOR_TYPES] = {
-    // UMA_RAPPOR_TYPE
-    {128 /* Num cohorts */,
-     4 /* Bloom filter size bytes */,
-     2 /* Bloom filter hash count */,
-     rappor::NORMAL_NOISE /* Noise level */,
-     UMA_RAPPOR_GROUP /* Recording group */},
-    // SAFEBROWSING_RAPPOR_TYPE
-    {128 /* Num cohorts */,
-     1 /* Bloom filter size bytes */,
-     2 /* Bloom filter hash count */,
-     rappor::NORMAL_NOISE /* Noise level */,
-     SAFEBROWSING_RAPPOR_GROUP /* Recording group */},
-    // ETLD_PLUS_ONE_RAPPOR_TYPE
-    {128 /* Num cohorts */,
-     16 /* Bloom filter size bytes */,
-     2 /* Bloom filter hash count */,
-     rappor::NORMAL_NOISE /* Noise level */,
-     UMA_RAPPOR_GROUP /* Recording group */},
-    // LOW_FREQUENCY_UMA_RAPPOR_TYPE
-    {128 /* Num cohorts */,
-     4 /* Bloom filter size bytes */,
-     2 /* Bloom filter hash count */,
-     rappor::SPARSE_NOISE /* Noise level */,
-     UMA_RAPPOR_GROUP /* Recording group */},
-    // LOW_FREQUENCY_SAFEBROWSING_RAPPOR_TYPE
-    {128 /* Num cohorts */,
-     1 /* Bloom filter size bytes */,
-     2 /* Bloom filter hash count */,
-     rappor::SPARSE_NOISE /* Noise level */,
-     SAFEBROWSING_RAPPOR_GROUP /* Recording group */},
-    // LOW_FREQUENCY_ETLD_PLUS_ONE_RAPPOR_TYPE
-    {128 /* Num cohorts */,
-     16 /* Bloom filter size bytes */,
-     2 /* Bloom filter hash count */,
-     rappor::SPARSE_NOISE /* Noise level */,
-     UMA_RAPPOR_GROUP /* Recording group */},
-};
-
-}  // namespace internal
-
-}  // namespace rappor
-
-#endif  // COMPONENTS_RAPPOR_RAPPOR_PARAMETERS_H_