[Chrome OS Bootstrapping]: Do not always power off the Bluetooth adapter.

chrome/browser/chromeos/login/wizard_controller.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/login/wizard_controller.h"
 
 #include <signal.h>
 #include <stddef.h>
 #include <stdlib.h>
 #include <sys/types.h>
@@ skipping 358 matching lines @@
     if (!shark_controller_) {
       shark_controller_.reset(
           new pairing_chromeos::BluetoothControllerPairingController());
     }
     return new ControllerPairingScreen(
         this, this, oobe_ui_->GetControllerPairingScreenActor(),
         shark_controller_.get());
   } else if (screen_name == kHostPairingScreenName) {
     if (!remora_controller_) {
       remora_controller_.reset(
-          new pairing_chromeos::BluetoothHostPairingController());
+          new pairing_chromeos::BluetoothHostPairingController(
+              BrowserThread::GetMessageLoopProxyForThread(
+                  BrowserThread::FILE)));
       remora_controller_->StartPairing();
     }
     return new HostPairingScreen(this, this,
                                  oobe_ui_->GetHostPairingScreenActor(),
                                  remora_controller_.get());
   } else if (screen_name == kDeviceDisabledScreenName) {
     return new DeviceDisabledScreen(this,
                                     oobe_ui_->GetDeviceDisabledScreenActor());
   }
 
@@ skipping 939 matching lines @@
 }
 
 void WizardController::MaybeStartListeningForSharkConnection() {
   // We shouldn't be here if we are running pairing OOBE already.
   if (IsControllerDetected())
     return;
 
   if (!shark_connection_listener_) {
     shark_connection_listener_.reset(
         new pairing_chromeos::SharkConnectionListener(
+            BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE),
             base::Bind(&WizardController::OnSharkConnected,
                        weak_factory_.GetWeakPtr())));
   }
 }
 
 void WizardController::OnSharkConnected(
     std::unique_ptr<pairing_chromeos::HostPairingController>
         remora_controller) {
   VLOG(1) << "OnSharkConnected";
   remora_controller_ = std::move(remora_controller);
@@ skipping 22 matching lines @@
             : policy::EnrollmentConfig::MODE_MANUAL_REENROLLMENT;
   }
 
   EnrollmentScreen* screen = EnrollmentScreen::Get(this);
   screen->SetParameters(effective_config, shark_controller_.get());
   SetStatusAreaVisible(true);
   SetCurrentScreen(screen);
 }
 
 }  // namespace chromeos