Remove implicit conversions from scoped_refptr to T* in c/b/chromeos/policy

chrome/browser/chromeos/policy/device_local_account_external_data_service.cc

 // Copyright 2013 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/policy/device_local_account_external_data_service.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 55 matching lines @@
       base::Unretained(resource_cache_.get()),
       account_ids));
 }
 
 scoped_refptr<DeviceLocalAccountExternalDataManager>
     DeviceLocalAccountExternalDataService::GetExternalDataManager(
         const std::string& account_id,
         CloudPolicyStore* policy_store) {
   scoped_refptr<DeviceLocalAccountExternalDataManager>& external_data_manager =
       external_data_managers_[account_id];
-  if (!external_data_manager) {
+  if (!external_data_manager.get()) {
     external_data_manager = new DeviceLocalAccountExternalDataManager(
         account_id,
         base::Bind(&GetChromePolicyDetails),
         backend_task_runner_,
         io_task_runner_,
         resource_cache_.get());
   }
   external_data_manager->SetPolicyStore(policy_store);
   return external_data_manager;
 }
 
 }  // namespace policy