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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 PrefHashFilter::ValueType value_type) | |
16 : pref_path_(pref_path), | |
17 reporting_id_(reporting_id), | |
18 reporting_ids_count_(reporting_ids_count), | |
19 enforce_(enforcement_level == PrefHashFilter::ENFORCE_ON_LOAD), | |
20 personal_(value_type == PrefHashFilter::VALUE_PERSONAL) { | |
21 } | |
22 | |
23 TrackedPreferenceHelper::ResetAction TrackedPreferenceHelper::GetAction( | |
24 PrefHashStoreTransaction::ValueState value_state) const { | |
25 switch (value_state) { | |
26 case PrefHashStoreTransaction::UNCHANGED: | |
27 // Desired case, nothing to do. | |
28 return DONT_RESET; | |
29 case PrefHashStoreTransaction::CLEARED: | |
30 // Unfortunate case, but there is nothing we can do. | |
31 return DONT_RESET; | |
32 case PrefHashStoreTransaction::TRUSTED_NULL_VALUE: // Falls through. | |
33 case PrefHashStoreTransaction::TRUSTED_UNKNOWN_VALUE: | |
34 // It is okay to seed the hash in this case. | |
35 return DONT_RESET; | |
36 case PrefHashStoreTransaction::SECURE_LEGACY: | |
37 // Accept secure legacy device ID based hashes. | |
38 return DONT_RESET; | |
39 case PrefHashStoreTransaction::UNTRUSTED_UNKNOWN_VALUE: // Falls through. | |
40 case PrefHashStoreTransaction::CHANGED: | |
41 return enforce_ ? DO_RESET : WANTED_RESET; | |
42 } | |
43 NOTREACHED() << "Unexpected PrefHashStoreTransaction::ValueState: " | |
44 << value_state; | |
45 return DONT_RESET; | |
46 } | |
47 | |
48 bool TrackedPreferenceHelper::IsPersonal() const { | |
49 return personal_; | |
50 } | |
51 | |
52 void TrackedPreferenceHelper::ReportValidationResult( | |
53 PrefHashStoreTransaction::ValueState value_state) const { | |
54 switch (value_state) { | |
55 case PrefHashStoreTransaction::UNCHANGED: | |
56 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceUnchanged", | |
57 reporting_id_, reporting_ids_count_); | |
58 return; | |
59 case PrefHashStoreTransaction::CLEARED: | |
60 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceCleared", | |
61 reporting_id_, reporting_ids_count_); | |
62 return; | |
63 case PrefHashStoreTransaction::SECURE_LEGACY: | |
64 UMA_HISTOGRAM_ENUMERATION( | |
65 "Settings.TrackedPreferenceMigratedLegacyDeviceId", reporting_id_, | |
66 reporting_ids_count_); | |
67 return; | |
68 case PrefHashStoreTransaction::CHANGED: | |
69 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceChanged", | |
70 reporting_id_, reporting_ids_count_); | |
71 return; | |
72 case PrefHashStoreTransaction::UNTRUSTED_UNKNOWN_VALUE: | |
73 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceInitialized", | |
74 reporting_id_, reporting_ids_count_); | |
75 return; | |
76 case PrefHashStoreTransaction::TRUSTED_UNKNOWN_VALUE: | |
77 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceTrustedInitialized", | |
78 reporting_id_, reporting_ids_count_); | |
79 return; | |
80 case PrefHashStoreTransaction::TRUSTED_NULL_VALUE: | |
81 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceNullInitialized", | |
82 reporting_id_, reporting_ids_count_); | |
83 return; | |
84 } | |
85 NOTREACHED() << "Unexpected PrefHashStoreTransaction::ValueState: " | |
86 << value_state; | |
87 } | |
88 | |
89 void TrackedPreferenceHelper::ReportAction(ResetAction reset_action) const { | |
90 switch (reset_action) { | |
91 case DONT_RESET: | |
92 // No report for DONT_RESET. | |
93 break; | |
94 case WANTED_RESET: | |
95 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceWantedReset", | |
96 reporting_id_, reporting_ids_count_); | |
97 break; | |
98 case DO_RESET: | |
99 UMA_HISTOGRAM_ENUMERATION("Settings.TrackedPreferenceReset", | |
100 reporting_id_, reporting_ids_count_); | |
101 break; | |
102 } | |
103 } | |
104 | |
105 void TrackedPreferenceHelper::ReportSplitPreferenceChangedCount( | |
106 size_t count) const { | |
107 // The histogram below is an expansion of the UMA_HISTOGRAM_COUNTS_100 macro | |
108 // adapted to allow for a dynamically suffixed histogram name. | |
109 // Note: The factory creates and owns the histogram. | |
110 base::HistogramBase* histogram = | |
111 base::LinearHistogram::FactoryGet( | |
112 "Settings.TrackedSplitPreferenceChanged." + pref_path_, | |
113 1, | |
114 100, // Allow counts up to 100. | |
115 101, | |
116 base::HistogramBase::kUmaTargetedHistogramFlag); | |
117 histogram->Add(count); | |
118 } | |
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