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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 #ifndef CHROME_BROWSER_PREFS_TRACKED_TRACKED_PREFERENCE_H_ | |
6 #define CHROME_BROWSER_PREFS_TRACKED_TRACKED_PREFERENCE_H_ | |
7 | |
8 class PrefHashStoreTransaction; | |
9 | |
10 namespace base { | |
11 class DictionaryValue; | |
12 class Value; | |
13 } | |
14 | |
15 // A TrackedPreference tracks changes to an individual preference, reporting and | |
16 // reacting to them according to preference-specific and browser-wide policies. | |
17 class TrackedPreference { | |
18 public: | |
19 virtual ~TrackedPreference() {} | |
20 | |
21 // Notifies the underlying TrackedPreference about its new |value| which | |
22 // can update hashes in the corresponding hash store via |transaction|. | |
23 virtual void OnNewValue(const base::Value* value, | |
24 PrefHashStoreTransaction* transaction) const = 0; | |
25 | |
26 // Verifies that the value of this TrackedPreference in |pref_store_contents| | |
27 // is valid. Responds to verification failures according to | |
28 // preference-specific and browser-wide policy and reports results to via UMA. | |
29 // May use |transaction| to check/modify hashes in the corresponding hash | |
30 // store. | |
31 virtual bool EnforceAndReport( | |
32 base::DictionaryValue* pref_store_contents, | |
33 PrefHashStoreTransaction* transaction) const = 0; | |
34 }; | |
35 | |
36 #endif // CHROME_BROWSER_PREFS_TRACKED_TRACKED_PREFERENCE_H_ | |
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