Tame the proliferation of UserContext constructors

chrome/browser/chromeos/login/users/user.h

 // Copyright 2014 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 CHROME_BROWSER_CHROMEOS_LOGIN_USERS_USER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USERS_USER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 18 matching lines @@
   enum AuthFlow {
     // Online authentication against GAIA. GAIA did not redirect to a SAML IdP.
     AUTH_FLOW_GAIA_WITHOUT_SAML,
     // Online authentication against GAIA. GAIA redirected to a SAML IdP.
     AUTH_FLOW_GAIA_WITH_SAML,
     // Offline authentication against a cached key.
     AUTH_FLOW_OFFLINE
   };
 
   UserContext();
-  UserContext(const std::string& user_id,
-              const std::string& password,
-              const std::string& auth_code);
-  UserContext(const std::string& user_id,
-              const std::string& password,
-              const std::string& auth_code,
-              const std::string& user_id_hash);
-  UserContext(const std::string& user_id,
-              const std::string& password,
-              const std::string& auth_code,
-              const std::string& user_id_hash,
-              bool is_using_oauth,
-              AuthFlow auth_flow);
+  UserContext(const UserContext& other);
+  explicit UserContext(const std::string& user_id);
   ~UserContext();
+
   bool operator==(const UserContext& context) const;
 
-  void CopyFrom(const UserContext& other);
-
   const std::string& GetUserID() const;
   const std::string& GetPassword() const;
   bool DoesNeedPasswordHashing() const;
   const std::string& GetKeyLabel() const;
   const std::string& GetAuthCode() const;
   const std::string& GetUserIDHash() const;
   bool IsUsingOAuth() const;
   AuthFlow GetAuthFlow() const;
 
   bool HasCredentials() const;
 
   void SetUserID(const std::string& user_id);
   void SetPassword(const std::string& password);
   void SetDoesNeedPasswordHashing(bool does_need_password_hashing);
   void SetKeyLabel(const std::string& key_label);
   void SetAuthCode(const std::string& auth_code);
   void SetUserIDHash(const std::string& user_id_hash);
   void SetIsUsingOAuth(bool is_using_oauth);
+  void SetAuthFlow(AuthFlow auth_flow);
+
+  void ClearSecrets();
 
  private:
   std::string user_id_;
   std::string password_;
   bool does_need_password_hashing_;
   std::string key_label_;
   std::string auth_code_;
   std::string user_id_hash_;
   bool is_using_oauth_;
   AuthFlow auth_flow_;
@@ skipping 257 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(User);
 };
 
 // List of known users.
 typedef std::vector<User*> UserList;
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USERS_USER_H_