[Proximity Auth] Port the UnlockManager class.

chrome/browser/signin/chrome_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 CHROME_BROWSER_SIGNIN_CHROME_PROXIMITY_AUTH_CLIENT_H_
 #define CHROME_BROWSER_SIGNIN_CHROME_PROXIMITY_AUTH_CLIENT_H_
 
 #include "base/macros.h"
 #include "components/proximity_auth/proximity_auth_client.h"
 
 class Profile;
 
 // A Chrome-specific implementation of the ProximityAuthClient interface.
 // There is one |ChromeProximityAuthClient| per |Profile|.
 class ChromeProximityAuthClient : public proximity_auth::ProximityAuthClient {
  public:
   explicit ChromeProximityAuthClient(Profile* profile);
   ~ChromeProximityAuthClient() override;
 
   // proximity_auth::ProximityAuthClient:
   std::string GetAuthenticatedUsername() const override;
+  void UpdateScreenlockState(proximity_auth::ScreenlockState state) override;
+  void FinalizeUnlock(bool success) override;
+  void FinalizeSignin(const std::string& secret) override;
 
  private:
   Profile* const profile_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeProximityAuthClient);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_CHROME_PROXIMITY_AUTH_CLIENT_H_