cros: Implement cryptohome backend for pin.

chrome/browser/chromeos/login/lock/screen_locker.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_LOCK_SCREEN_LOCKER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_LOCK_SCREEN_LOCKER_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 210 matching lines @@
   bool IsUserLoggedIn(const AccountId& account_id) const;
 
   // Looks up user in unlock user list.
   const user_manager::User* FindUnlockUser(const AccountId& account_id);
 
   // Callback to be invoked for ash start lock request. |locked| is true when
   // ash is fully locked and post lock animation finishes. Otherwise, the start
   // lock request is failed.
   void OnStartLockCallback(bool locked);
 
+  // Called when the pin attempt is finished running.
+  void OnPinAttemptDone(const UserContext& user_context, bool success);
+
+  // Called to continue authentication against cryptohome after the pin login
+  // check has completed.
+  void ContinueAuthenticate(const UserContext& user_context);
+
   // WebUIScreenLocker instance in use.
   std::unique_ptr<WebUIScreenLocker> web_ui_;
 
   // Delegate used to talk to the view.
   Delegate* delegate_ = nullptr;
   bool owns_delegate_ = false;
 
   // Users that can unlock the device.
   user_manager::UserList users_;
 
@@ skipping 40 matching lines @@
   mojo::Binding<device::mojom::FingerprintObserver> binding_;
 
   base::WeakPtrFactory<ScreenLocker> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenLocker);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_LOCK_SCREEN_LOCKER_H_