[EasyUnlock] Update ProximityMonitor to only check for RSSI proximity.

components/proximity_auth/fake_remote_device_life_cycle.cc

 // 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.
 
 #include "components/proximity_auth/fake_remote_device_life_cycle.h"
 
 namespace proximity_auth {
 
 FakeRemoteDeviceLifeCycle::FakeRemoteDeviceLifeCycle(
     const cryptauth::RemoteDevice& remote_device)
     : remote_device_(remote_device),
       started_(false),
       state_(RemoteDeviceLifeCycle::State::STOPPED) {}
 
 FakeRemoteDeviceLifeCycle::~FakeRemoteDeviceLifeCycle() {}
 
 void FakeRemoteDeviceLifeCycle::Start() {
   started_ = true;
 }
 
 cryptauth::RemoteDevice FakeRemoteDeviceLifeCycle::GetRemoteDevice() const {
   return remote_device_;
 }
 
+cryptauth::Connection* FakeRemoteDeviceLifeCycle::GetConnection() const {
+  return connection_;
+}
+
 RemoteDeviceLifeCycle::State FakeRemoteDeviceLifeCycle::GetState() const {
   return state_;
 }
 
 Messenger* FakeRemoteDeviceLifeCycle::GetMessenger() {
   return messenger_;
 }
 
 void FakeRemoteDeviceLifeCycle::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void FakeRemoteDeviceLifeCycle::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void FakeRemoteDeviceLifeCycle::ChangeState(State new_state) {
   State old_state = state_;
   state_ = new_state;
   for (auto& observer : observers_)
     observer.OnLifeCycleStateChanged(old_state, new_state);
 }
 
 }  // namespace proximity_auth