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

extensions/browser/api/system_storage/storage_info_provider.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 "extensions/browser/api/system_storage/storage_info_provider.h"
 
 #include "base/stl_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/sys_info.h"
 #include "base/threading/sequenced_worker_pool.h"
@@ skipping 35 matching lines @@
 
 StorageInfoProvider::~StorageInfoProvider() {
 }
 
 const StorageUnitInfoList& StorageInfoProvider::storage_unit_info_list() const {
   return info_;
 }
 
 void StorageInfoProvider::InitializeForTesting(
     scoped_refptr<StorageInfoProvider> provider) {
-  DCHECK(provider.get() != NULL);
+  DCHECK(provider.get() != nullptr);
   provider_.Get() = provider;
 }
 
 void StorageInfoProvider::PrepareQueryOnUIThread() {
   // Get all available storage devices before invoking |QueryInfo()|.
   GetAllStoragesIntoInfoList();
 }
 
 void StorageInfoProvider::InitializeProvider(
     const base::Closure& do_query_info_callback) {
@@ skipping 41 matching lines @@
     if (device_id == it->device_id())
       return static_cast<double>(
           base::SysInfo::AmountOfFreeDiskSpace(base::FilePath(it->location())));
   }
 
   return -1;
 }
 
 // static
 StorageInfoProvider* StorageInfoProvider::Get() {
-  if (provider_.Get().get() == NULL)
+  if (provider_.Get().get() == nullptr)
     provider_.Get() = new StorageInfoProvider();
   return provider_.Get().get();
 }
 
 }  // namespace extensions