Add RemoteDeviceLoader to create RemoteDevice from CryptAuth data.

components/proximity_auth/remote_device_life_cycle_impl.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/remote_device_life_cycle_impl.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/time/default_tick_clock.h"
@@ skipping 71 matching lines @@
         nullptr, bluetooth_throttler_.get(), 3));
   } else {
     return make_scoped_ptr(new BluetoothConnectionFinder(
         remote_device_, device::BluetoothUUID(kClassicBluetoothServiceUUID),
         base::TimeDelta::FromSeconds(3)));
   }
 }
 
 scoped_ptr<Authenticator> RemoteDeviceLifeCycleImpl::CreateAuthenticator() {
   return make_scoped_ptr(new DeviceToDeviceAuthenticator(
-      connection_.get(), proximity_auth_client_->GetAccountId(),
+      connection_.get(), remote_device_.user_id,
       proximity_auth_client_->CreateSecureMessageDelegate()));
 }
 
 void RemoteDeviceLifeCycleImpl::TransitionToState(
     RemoteDeviceLifeCycle::State new_state) {
   PA_LOG(INFO) << "Life cycle transition: " << static_cast<int>(state_)
                << " => " << static_cast<int>(new_state);
   RemoteDeviceLifeCycle::State old_state = state_;
   state_ = new_state;
   FOR_EACH_OBSERVER(Observer, observers_,
@@ skipping 54 matching lines @@
 
   TransitionToState(RemoteDeviceLifeCycle::State::SECURE_CHANNEL_ESTABLISHED);
 }
 
 void RemoteDeviceLifeCycleImpl::OnDisconnected() {
   DCHECK(state_ == RemoteDeviceLifeCycle::State::SECURE_CHANNEL_ESTABLISHED);
   FindConnection();
 }
 
 }  // namespace proximity_auth