[Mac] Add option to reauthenticate the OS user before revealing passwords.

chrome/browser/ui/webui/options/password_manager_handler.h

 // Copyright (c) 2012 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_UI_WEBUI_OPTIONS_PASSWORD_MANAGER_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS_PASSWORD_MANAGER_HANDLER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 46 matching lines @@
 
   // Request the plain text password for an entry to be revealed.
   // @param index The index of the entry.
   void RequestShowPassword(const ListValue* args);
 
   // Sets the password and exception list contents to the given data.
   // We take ownership of the PasswordForms in the vector.
   void SetPasswordList();
   void SetPasswordExceptionList();
 
+  // Returns true if the user needs to be authenticated before a plaintext
+  // password is revealed.
+  bool IsAuthenticationRequired();
+
   // A short class to mediate requests to the password store.
   class ListPopulater : public PasswordStoreConsumer {
    public:
     explicit ListPopulater(PasswordManagerHandler* page);
     virtual ~ListPopulater();
 
     // Send a query to the password store to populate a list.
     virtual void Populate() = 0;
 
    protected:
@@ skipping 39 matching lines @@
 
   ScopedVector<autofill::PasswordForm> password_list_;
   ScopedVector<autofill::PasswordForm> password_exception_list_;
 
   // User's pref
   std::string languages_;
 
   // Whether to show stored passwords or not.
   BooleanPrefMember show_passwords_;
 
-  // Indicates whether or not the user has recently been authenticated.
-  // Used to determine whether or not to reveal plain text passwords.
-  bool is_user_authenticated_;
+  // Indicates whether or not the password manager should require the user to
+  // reauthenticate before revealing plaintext passwords.
+  bool require_reauthentication_;
+
+  // The last time the user was successfully authenticated.
+  // Used to determine whether or not to reveal plaintext passwords.
+  base::TimeTicks last_authentication_time_;
 
   DISALLOW_COPY_AND_ASSIGN(PasswordManagerHandler);
 };
 
 }  // namespace options
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_PASSWORD_MANAGER_HANDLER_H_