Fixes for handling of MockDBusThreadManager::GetSystemBus().

chrome/browser/chromeos/bluetooth/bluetooth_device.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/bluetooth/bluetooth_device.h"
 
 #include <map>
 #include <string>
 #include <vector>
 
@@ skipping 231 matching lines @@
     // to generate it as we only support one pairing attempt at a time for
     // a given bluetooth device.
     DCHECK(agent_.get() == NULL);
 
     std::string agent_path_basename;
     ReplaceChars(address_, ":", "_", &agent_path_basename);
     dbus::ObjectPath agent_path("/org/chromium/bluetooth_agent/" +
                                 agent_path_basename);
 
     dbus::Bus* system_bus = DBusThreadManager::Get()->GetSystemBus();
-    agent_.reset(BluetoothAgentServiceProvider::Create(system_bus,
-                                                       agent_path,
-                                                       this));
+    if (system_bus) {
+      agent_.reset(BluetoothAgentServiceProvider::Create(system_bus,
+                                                         agent_path,
+                                                         this));
+    } else {
+      agent_.reset(NULL);
+    }
 
     DVLOG(1) << "Pairing: " << address_;
     DBusThreadManager::Get()->GetBluetoothAdapterClient()->
         CreatePairedDevice(adapter_->object_path_,
                            address_,
                            agent_path,
                            bluetooth_agent::kDisplayYesNoCapability,
                            base::Bind(&BluetoothDevice::ConnectCallback,
                                       weak_ptr_factory_.GetWeakPtr(),
                                       callback,
@@ skipping 497 matching lines @@
   pairing_delegate_->DismissDisplayOrConfirm();
 }
 
 
 // static
 BluetoothDevice* BluetoothDevice::Create(BluetoothAdapter* adapter) {
   return new BluetoothDevice(adapter);
 }
 
 }  // namespace chromeos