Hook up ProximityAuthSystem in EasyUnlockService.

components/proximity_auth/messenger_impl.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 COMPONENTS_PROXIMITY_AUTH_MESSENGER_IMPL_H
 #define COMPONENTS_PROXIMITY_AUTH_MESSENGER_IMPL_H
 
 #include <deque>
 
 #include "base/macros.h"
@@ skipping 67 matching lines @@
   void HandleRemoteStatusUpdateMessage(const base::DictionaryValue& message);
 
   // Handles an incoming "decrypt_response" message, parsing and notifying
   // observers of the decrypted content.
   void HandleDecryptResponseMessage(const base::DictionaryValue& message);
 
   // Handles an incoming "unlock_response" message, notifying observers of the
   // response.
   void HandleUnlockResponseMessage(const base::DictionaryValue& message);
 
+  // For iOS, we can not get the screen lock state reliably without polling.

[sacomoto, 2015/09/29 18:45:57]

nit: We need to poll the iOS device to keep the application alive on the
background.

[Tim Song, 2015/09/30 00:05:04]

Done.

+  // This function sends a poll message every few seconds.
+  void PollScreenStateForIOS();
+
   // ConnectionObserver:
   void OnConnectionStatusChanged(Connection* connection,
                                  Connection::Status old_status,
                                  Connection::Status new_status) override;
   void OnMessageReceived(const Connection& connection,
                          const WireMessage& wire_message) override;
   void OnSendCompleted(const Connection& connection,
                        const WireMessage& wire_message,
                        bool success) override;
 
@@ skipping 15 matching lines @@
   scoped_ptr<PendingMessage> pending_message_;
 
   base::WeakPtrFactory<MessengerImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MessengerImpl);
 };
 
 }  // namespace proximity_auth
 
 #endif  // COMPONENTS_PROXIMITY_AUTH_MESSENGER_IMPL_H