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_ 37
