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

extensions/renderer/event_bindings.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/event_bindings.h"
 
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 197 matching lines @@
   // This method throws an exception if it returns false.
   if (!dispatcher_->CheckContextAccessToExtensionAPI(event_name, context()))
     return;
 
   std::string extension_id = context()->GetExtensionID();
 
   scoped_ptr<base::DictionaryValue> filter;
   scoped_ptr<content::V8ValueConverter> converter(
       content::V8ValueConverter::create());
 
-  base::DictionaryValue* filter_dict = NULL;
+  base::DictionaryValue* filter_dict = nullptr;
   base::Value* filter_value =
       converter->FromV8Value(args[1]->ToObject(), context()->v8_context());
   if (!filter_value) {
     args.GetReturnValue().Set(static_cast<int32_t>(-1));
     return;
   }
   if (!filter_value->GetAsDictionary(&filter_dict)) {
     delete filter_value;
     args.GetReturnValue().Set(static_cast<int32_t>(-1));
     return;
@@ skipping 65 matching lines @@
 }
 
 scoped_ptr<EventMatcher> EventBindings::ParseEventMatcher(
     base::DictionaryValue* filter_dict) {
   return scoped_ptr<EventMatcher>(new EventMatcher(
       scoped_ptr<base::DictionaryValue>(filter_dict->DeepCopy()),
       context()->GetRenderView()->GetRoutingID()));
 }
 
 }  // namespace extensions