Migrate chrome.bluetooth API backend to use device::BluetoothDiscoverySession.

device/bluetooth/bluetooth_adapter.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 "device/bluetooth/bluetooth_adapter.h"
 
 #include "base/bind.h"
 #include "base/stl_util.h"
 #include "device/bluetooth/bluetooth_device.h"
 #include "device/bluetooth/bluetooth_discovery_session.h"
@@ skipping 95 matching lines @@
   if (pairing_delegates_.empty())
     return NULL;
 
   return pairing_delegates_.front().first;
 }
 
 void BluetoothAdapter::OnStartDiscoverySession(
     const DiscoverySessionCallback& callback) {
   VLOG(1) << "Discovery session started!";
   scoped_ptr<BluetoothDiscoverySession> discovery_session(
-      new BluetoothDiscoverySession(this));
+      new BluetoothDiscoverySession(scoped_refptr<BluetoothAdapter>(this)));
   discovery_sessions_.insert(discovery_session.get());
   callback.Run(discovery_session.Pass());
 }
 
 void BluetoothAdapter::MarkDiscoverySessionsAsInactive() {
   for (std::set<BluetoothDiscoverySession*>::iterator
           iter = discovery_sessions_.begin();
        iter != discovery_sessions_.end(); ++iter) {
     (*iter)->MarkAsInactive();
   }
 }
 
 void BluetoothAdapter::DiscoverySessionDestroyed(
     BluetoothDiscoverySession* discovery_session) {
   discovery_sessions_.erase(discovery_session);
 }
 
 }  // namespace device