Implementation of sync password hash clearing.

components/password_manager/core/browser/password_reuse_detector.h

 // Copyright 2016 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_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_REUSE_DETECTOR_H_
 #define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_REUSE_DETECTOR_H_
 
 #include <stdint.h>
 #include <map>
 #include <memory>
@@ skipping 40 matching lines @@
   // If such suffix is found, |consumer|->OnReuseFound() is called on the same
   // thread on which this method is called.
   // |consumer| should not be null.
   void CheckReuse(const base::string16& input,
                   const std::string& domain,
                   PasswordReuseDetectorConsumer* consumer);
 
   // Saves a hash of |password| for password reuse checking.
   void SaveSyncPasswordHash(const base::string16& password);
 
+  // Clears a sync password hash if it was saved.
+  void ClearSyncPasswordHash();
+
  private:
   using passwords_iterator = std::map<base::string16,
                                       std::set<std::string>,
                                       ReverseStringLess>::const_iterator;
 
   // Add password from |form| to |passwords_|.
   void AddPassword(const autofill::PasswordForm& form);
 
   // Returns true iff a reuse of a sync password is found. If reuse is found it
   // is reported to |consumer|.
@@ skipping 24 matching lines @@
 
   base::Optional<uint64_t> sync_password_hash_;
   PrefService* const prefs_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordReuseDetector);
 };
 
 }  // namespace password_manager
 
 #endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_PASSWORD_REUSE_DETECTOR_H_