Implementation of sync password hash clearing.

components/password_manager/core/browser/password_reuse_detector.h

Index: components/password_manager/core/browser/password_reuse_detector.h
diff --git a/components/password_manager/core/browser/password_reuse_detector.h b/components/password_manager/core/browser/password_reuse_detector.h
index d42f3137c77fe53f2c759b43bfbdbe4e49b02f76..3cf65696bdb04904fc6ca0d977ba28c20950612b 100644
--- a/components/password_manager/core/browser/password_reuse_detector.h
+++ b/components/password_manager/core/browser/password_reuse_detector.h
@@ -58,6 +58,9 @@ class PasswordReuseDetector : public PasswordStoreConsumer {
   // 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>,