[EasyUnlock] Force user to enter their password after 20 hours.

components/proximity_auth/proximity_auth_pref_manager.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_PROXIMITY_AUTH_PROXIMITY_AUTH_PREF_MANAGER_H
 #define COMPONENTS_PROXIMITY_AUTH_PROXIMITY_AUTH_PREF_MANAGER_H
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 41 matching lines @@
 
   // Queries the devices stored in |kProximityAuthRemoteBleDevices| pref by
   // |bluetooth_address| or |public_key|. Virtual for testing.
   virtual bool HasDeviceWithAddress(const std::string& bluetooth_address) const;
   virtual bool HasDeviceWithPublicKey(const std::string& public_key) const;
   virtual std::string GetDevicePublicKey(
       const std::string& bluetooth_address) const;
   virtual std::string GetDeviceAddress(const std::string& public_key) const;
   virtual std::vector<std::string> GetPublicKeys() const;
 
+  // Setter and getter for the timestamp of the last password entry. This
+  // preference is used to enforce reauthing with the password after a given
+  // time period has elapsed.
+  void SetLastPasswordEntryTimestampMs(int64_t timestamp_ms);
+  int64_t GetLastPasswordEntryTimestampMs();
+
  private:
   const base::DictionaryValue* GetRemoteBleDevices() const;
 
   // Contains perferences that outlive the lifetime of this object and across
   // process restarts. Not owned and must outlive this instance.
   PrefService* pref_service_;
 
   DISALLOW_COPY_AND_ASSIGN(ProximityAuthPrefManager);
 };
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_PROXIMITY_AUTH_PREF_MANAGER_H