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

extensions/renderer/user_script_set_manager.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/renderer/user_script_set_manager.h"
 
 #include "components/crx_file/id_util.h"
 #include "content/public/renderer/render_thread.h"
 #include "extensions/common/extension_messages.h"
 #include "extensions/renderer/dispatcher.h"
@@ skipping 73 matching lines @@
        it != programmatic_scripts_.end();
        ++it) {
     it->second->GetActiveExtensionIds(ids);
   }
 }
 
 UserScriptSet* UserScriptSetManager::GetProgrammaticScriptsByExtension(
     const ExtensionId& extension_id) {
   UserScriptSetMap::const_iterator it =
       programmatic_scripts_.find(extension_id);
-  return it != programmatic_scripts_.end() ? it->second.get() : NULL;
+  return it != programmatic_scripts_.end() ? it->second.get() : nullptr;
 }
 
 void UserScriptSetManager::OnUpdateUserScripts(
     base::SharedMemoryHandle shared_memory,
     const ExtensionId& extension_id,
     const std::set<std::string>& changed_extensions) {
   if (!base::SharedMemory::IsHandleValid(shared_memory)) {
     NOTREACHED() << "Bad scripts handle";
     return;
   }
 
   for (std::set<std::string>::const_iterator iter = changed_extensions.begin();
        iter != changed_extensions.end();
        ++iter) {
     if (!crx_file::id_util::IdIsValid(*iter)) {
       NOTREACHED() << "Invalid extension id: " << *iter;
       return;
     }
   }
 
-  UserScriptSet* scripts = NULL;
+  UserScriptSet* scripts = nullptr;
   if (!extension_id.empty()) {
     // The expectation when there is an extension that "owns" this shared
     // memory region is that the |changed_extensions| is either the empty list
     // or just the owner.
     CHECK(changed_extensions.size() <= 1);
     if (programmatic_scripts_.find(extension_id) ==
         programmatic_scripts_.end()) {
       scripts = new UserScriptSet(extensions_);
       programmatic_scripts_[extension_id] = make_linked_ptr(scripts);
     } else {
@@ skipping 23 matching lines @@
 
   if (scripts->UpdateUserScripts(shared_memory, *effective_extensions)) {
     FOR_EACH_OBSERVER(
         Observer,
         observers_,
         OnUserScriptsUpdated(*effective_extensions, scripts->scripts()));
   }
 }
 
 }  // namespace extensions