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 3 // found in the LICENSE file. 4 5 #include "chrome/browser/prefs/tracked/tracked_preference_helper.h" 6 7 #include "base/logging.h" 8 #include "base/metrics/histogram.h" 9 10 TrackedPreferenceHelper::TrackedPreferenceHelper( 11 const std::string& pref_path, 12 size_t reporting_id, 13 size_t reporting_ids_count, 14 PrefHashFilter::EnforcementLevel enforcement_level) 15 : pref_path_(pref_path), 16 reporting_id_(reporting_id), reporting_ids_count_(reporting_ids_count), 17 enforce_(enforcement_level == PrefHashFilter::ENFORCE_ON_LOAD) { 18 } 19 20 TrackedPreferenceHelper::ResetAction TrackedPreferenceHelper::GetAction( 21 PrefHashStoreTransaction::ValueState value_state) const { 22 switch (value_state) { 23 case PrefHashStoreTransaction::UNCHANGED: 24 // Desired case, nothing to do. 25 return DONT_RESET; 26 case PrefHashStoreTransaction::CLEARED: 27 // Unfortunate case, but there is nothing we can do. 28 return DONT_RESET; 29 case PrefHashStoreTransaction::TRUSTED_UNKNOWN_VALUE: 30 // It is okay to seed the hash in this case. 31 return DONT_RESET; 32 case PrefHashStoreTransaction::SECURE_LEGACY: 33 // Accept secure legacy device ID based hashes. 34 return DONT_RESET; 35 case PrefHashStoreTransaction::UNTRUSTED_UNKNOWN_VALUE: // Falls through. 36 case PrefHashStoreTransaction::CHANGED: 37 return enforce_ ? DO_RESET : WANTED_RESET; 38 } 39 NOTREACHED() << "Unexpected PrefHashStoreTransaction::ValueState: " 40 << value_state; 41 return DONT_RESET; 42 } 43 44 void TrackedPreferenceHelper::ReportValidationResult( 45 PrefHashStoreTransaction::ValueState value_state) const { 46 switch (value_state) { 47 case PrefHashStoreTransaction::UNCHANGED: 48 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceUnchanged", 49 reporting_id_, reporting_ids_count_); 50 return; 51 case PrefHashStoreTransaction::CLEARED: 52 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceCleared", 53 reporting_id_, reporting_ids_count_); 54 return; 55 case PrefHashStoreTransaction::SECURE_LEGACY: 56 UMA_HISTOGRAM_ENUMERATION( 57 "Settings.TrackedPreferenceMigratedLegacyDeviceId", reporting_id_, 58 reporting_ids_count_); 59 return; 60 case PrefHashStoreTransaction::CHANGED: 61 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceChanged", 62 reporting_id_, reporting_ids_count_); 63 return; 64 case PrefHashStoreTransaction::UNTRUSTED_UNKNOWN_VALUE: 65 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceInitialized", 66 reporting_id_, reporting_ids_count_); 67 return; 68 case PrefHashStoreTransaction::TRUSTED_UNKNOWN_VALUE: 69 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceTrustedInitialized", 70 reporting_id_, reporting_ids_count_); 71 return; 72 } 73 NOTREACHED() << "Unexpected PrefHashStoreTransaction::ValueState: " 74 << value_state; 75 } 76 77 void TrackedPreferenceHelper::ReportAction(ResetAction reset_action) const { 78 switch (reset_action) { 79 case DONT_RESET: 80 // No report for DONT_RESET. 81 break; 82 case WANTED_RESET: 83 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceWantedReset", 84 reporting_id_, reporting_ids_count_); 85 break; 86 case DO_RESET: 87 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceReset", 88 reporting_id_, reporting_ids_count_); 89 break; 90 } 91 } 92 93 void TrackedPreferenceHelper::ReportSplitPreferenceChangedCount( 94 size_t count) const { 95 // The histogram below is an expansion of the UMA_HISTOGRAM_COUNTS_100 macro 96 // adapted to allow for a dynamically suffixed histogram name. 97 // Note: The factory creates and owns the histogram. 98 base::HistogramBase* histogram = 99 base::LinearHistogram::FactoryGet( 100 "Settings.TrackedSplitPreferenceChanged." + pref_path_, 101 1, 102 100, // Allow counts up to 100. 103 101, 104 base::HistogramBase::kUmaTargetedHistogramFlag); 105 histogram->Add(count); 106 } 107
