[Proximity Auth] Port the UnlockManager class.

components/proximity_auth/proximity_auth_client.h

 // Copyright 2015 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_PROXIMITY_AUTH_CLIENT_H_
 #define COMPONENTS_PROXIMITY_AUTH_CLIENT_H_
 
 #include <string>
 
+#include "components/proximity_auth/screenlock_state.h"
+
 namespace proximity_auth {
 
 // An interface that needs to be supplied to the Proximity Auth component by its
 // embedder. There should be one |ProximityAuthClient| per
 // |content::BrowserContext|.
 class ProximityAuthClient {
  public:
   virtual ~ProximityAuthClient() {}
 
   // Returns the authenticated username.
   virtual std::string GetAuthenticatedUsername() const = 0;
+
+  // Updates the user pod on the signin or lock screen to reflect the provided
+  // screenlock state.
+  virtual void UpdateScreenlockState(ScreenlockState state) = 0;
+
+  // Finalizes the previously started auth attempt for unlock. Cancels the
+  // current auth attempt if one exists.
+  virtual void FinalizeUnlock(bool success) = 0;
+
+  // Finalizes the previously started auth attempt for sign-in. Cancels the
+  // current auth attempt if one exists.
+  virtual void FinalizeSignin(const std::string& secret) = 0;
 };
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_CLIENT_H_