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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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| 146   // Otherwise, it returns an entropy provider that is based on a low entropy | 146   // Otherwise, it returns an entropy provider that is based on a low entropy | 
| 147   // source. | 147   // source. | 
| 148   scoped_ptr<const base::FieldTrial::EntropyProvider> CreateEntropyProvider(); | 148   scoped_ptr<const base::FieldTrial::EntropyProvider> CreateEntropyProvider(); | 
| 149 | 149 | 
| 150   // At startup, prefs needs to be called with a list of all the pref names and | 150   // At startup, prefs needs to be called with a list of all the pref names and | 
| 151   // types we'll be using. | 151   // types we'll be using. | 
| 152   static void RegisterPrefs(PrefRegistrySimple* registry); | 152   static void RegisterPrefs(PrefRegistrySimple* registry); | 
| 153 | 153 | 
| 154   // HistogramFlattener: | 154   // HistogramFlattener: | 
| 155   virtual void RecordDelta(const base::HistogramBase& histogram, | 155   virtual void RecordDelta(const base::HistogramBase& histogram, | 
| 156                            const base::HistogramSamples& snapshot) OVERRIDE; | 156                            const base::HistogramSamples& snapshot) override; | 
| 157   virtual void InconsistencyDetected( | 157   virtual void InconsistencyDetected( | 
| 158       base::HistogramBase::Inconsistency problem) OVERRIDE; | 158       base::HistogramBase::Inconsistency problem) override; | 
| 159   virtual void UniqueInconsistencyDetected( | 159   virtual void UniqueInconsistencyDetected( | 
| 160       base::HistogramBase::Inconsistency problem) OVERRIDE; | 160       base::HistogramBase::Inconsistency problem) override; | 
| 161   virtual void InconsistencyDetectedInLoggedCount(int amount) OVERRIDE; | 161   virtual void InconsistencyDetectedInLoggedCount(int amount) override; | 
| 162 | 162 | 
| 163   // This should be called when the application is not idle, i.e. the user seems | 163   // This should be called when the application is not idle, i.e. the user seems | 
| 164   // to be interacting with the application. | 164   // to be interacting with the application. | 
| 165   void OnApplicationNotIdle(); | 165   void OnApplicationNotIdle(); | 
| 166 | 166 | 
| 167   // Invoked when we get a WM_SESSIONEND. This places a value in prefs that is | 167   // Invoked when we get a WM_SESSIONEND. This places a value in prefs that is | 
| 168   // reset when RecordCompletedSessionEnd is invoked. | 168   // reset when RecordCompletedSessionEnd is invoked. | 
| 169   void RecordStartOfSessionEnd(); | 169   void RecordStartOfSessionEnd(); | 
| 170 | 170 | 
| 171   // This should be called when the application is shutting down. It records | 171   // This should be called when the application is shutting down. It records | 
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| 466   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, | 466   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, | 
| 467                            PermutedEntropyCacheClearedWhenLowEntropyReset); | 467                            PermutedEntropyCacheClearedWhenLowEntropyReset); | 
| 468   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, RegisterSyntheticTrial); | 468   FRIEND_TEST_ALL_PREFIXES(MetricsServiceTest, RegisterSyntheticTrial); | 
| 469 | 469 | 
| 470   DISALLOW_COPY_AND_ASSIGN(MetricsService); | 470   DISALLOW_COPY_AND_ASSIGN(MetricsService); | 
| 471 }; | 471 }; | 
| 472 | 472 | 
| 473 }  // namespace metrics | 473 }  // namespace metrics | 
| 474 | 474 | 
| 475 #endif  // COMPONENTS_METRICS_METRICS_SERVICE_H_ | 475 #endif  // COMPONENTS_METRICS_METRICS_SERVICE_H_ | 
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