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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // This file defines a service that collects information about the user | 5 // This file defines a service that collects information about the user |
6 // experience in order to help improve future versions of the app. | 6 // experience in order to help improve future versions of the app. |
7 | 7 |
8 #ifndef COMPONENTS_METRICS_METRICS_SERVICE_H_ | 8 #ifndef COMPONENTS_METRICS_METRICS_SERVICE_H_ |
9 #define COMPONENTS_METRICS_METRICS_SERVICE_H_ | 9 #define COMPONENTS_METRICS_METRICS_SERVICE_H_ |
10 | 10 |
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117 // Returns the install date of the application, in seconds since the epoch. | 117 // Returns the install date of the application, in seconds since the epoch. |
118 int64_t GetInstallDate(); | 118 int64_t GetInstallDate(); |
119 | 119 |
120 // Returns the date at which the current metrics client ID was created as | 120 // Returns the date at which the current metrics client ID was created as |
121 // an int64_t containing seconds since the epoch. | 121 // an int64_t containing seconds since the epoch. |
122 int64_t GetMetricsReportingEnabledDate(); | 122 int64_t GetMetricsReportingEnabledDate(); |
123 | 123 |
124 // Returns true if the last session exited cleanly. | 124 // Returns true if the last session exited cleanly. |
125 bool WasLastShutdownClean() const; | 125 bool WasLastShutdownClean() const; |
126 | 126 |
127 // Returns the preferred entropy provider used to seed persistent activities | |
128 // based on whether or not metrics reporting will be permitted on this client. | |
129 // | |
130 // If metrics reporting is enabled, this method returns an entropy provider | |
131 // that has a high source of entropy, partially based on the client ID. | |
132 // Otherwise, it returns an entropy provider that is based on a low entropy | |
133 // source. | |
134 std::unique_ptr<const base::FieldTrial::EntropyProvider> | |
135 CreateEntropyProvider(); | |
136 | |
137 // At startup, prefs needs to be called with a list of all the pref names and | 127 // At startup, prefs needs to be called with a list of all the pref names and |
138 // types we'll be using. | 128 // types we'll be using. |
139 static void RegisterPrefs(PrefRegistrySimple* registry); | 129 static void RegisterPrefs(PrefRegistrySimple* registry); |
140 | 130 |
141 // HistogramFlattener: | 131 // HistogramFlattener: |
142 void RecordDelta(const base::HistogramBase& histogram, | 132 void RecordDelta(const base::HistogramBase& histogram, |
143 const base::HistogramSamples& snapshot) override; | 133 const base::HistogramSamples& snapshot) override; |
144 void InconsistencyDetected( | 134 void InconsistencyDetected( |
145 base::HistogramBase::Inconsistency problem) override; | 135 base::HistogramBase::Inconsistency problem) override; |
146 void UniqueInconsistencyDetected( | 136 void UniqueInconsistencyDetected( |
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507 // Weak pointers factory used for saving state. All weak pointers managed by | 497 // Weak pointers factory used for saving state. All weak pointers managed by |
508 // this factory are invalidated in ScheduleNextStateSave. | 498 // this factory are invalidated in ScheduleNextStateSave. |
509 base::WeakPtrFactory<MetricsService> state_saver_factory_; | 499 base::WeakPtrFactory<MetricsService> state_saver_factory_; |
510 | 500 |
511 DISALLOW_COPY_AND_ASSIGN(MetricsService); | 501 DISALLOW_COPY_AND_ASSIGN(MetricsService); |
512 }; | 502 }; |
513 | 503 |
514 } // namespace metrics | 504 } // namespace metrics |
515 | 505 |
516 #endif // COMPONENTS_METRICS_METRICS_SERVICE_H_ | 506 #endif // COMPONENTS_METRICS_METRICS_SERVICE_H_ |
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