Run clang-modernize -use-nullptr over src/extensions/.

extensions/browser/api/bluetooth_low_energy/utils.cc

 // Copyright 2014 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 "extensions/browser/api/bluetooth_low_energy/utils.h"
 
 namespace extensions {
 namespace core_api {
 namespace bluetooth_low_energy {
 
@@ skipping 25 matching lines @@
   return to.Pass();
 }
 
 scoped_ptr<base::DictionaryValue> DescriptorToValue(Descriptor* from) {
   // Copy the characteristic properties and set them later manually.
   std::vector<CharacteristicProperty> properties =
       from->characteristic.properties;
   from->characteristic.properties.clear();
   scoped_ptr<base::DictionaryValue> to = from->ToValue();
 
-  base::DictionaryValue* chrc_value = NULL;
+  base::DictionaryValue* chrc_value = nullptr;
   to->GetDictionaryWithoutPathExpansion("characteristic", &chrc_value);
   DCHECK(chrc_value);
   chrc_value->SetWithoutPathExpansion(
       "properties", CharacteristicPropertiesToValue(properties).release());
   return to.Pass();
 }
 
 }  // namespace bluetooth_low_energy
 }  // namespace core_api
 }  // namespace extensions