Convert Pass()→std::move() for CrOS extension code.

chrome/browser/chromeos/extensions/device_local_account_external_policy_loader.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/extensions/device_local_account_external_policy_loader.h"
 
+#include <utility>
+
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/prefs/pref_value_map.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/policy_handlers.h"
 #include "components/policy/core/common/policy_map.h"
 #include "extensions/browser/pref_names.h"
 #include "net/url_request/url_request_context_getter.h"
 
@@ skipping 84 matching lines @@
     policy_handler.ApplyPolicySettings(policy_map, &pref_value_map);
     const base::Value* value = NULL;
     const base::DictionaryValue* dict = NULL;
     if (pref_value_map.GetValue(extensions::pref_names::kInstallForceList,
                                 &value) &&
         value->GetAsDictionary(&dict)) {
       prefs.reset(dict->DeepCopy());
     }
   }
 
-  external_cache_->UpdateExtensionsList(prefs.Pass());
+  external_cache_->UpdateExtensionsList(std::move(prefs));
 }
 
 }  // namespace chromeos