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

extensions/browser/event_listener_map.cc

Index: extensions/browser/event_listener_map.cc
diff --git a/extensions/browser/event_listener_map.cc b/extensions/browser/event_listener_map.cc
index d6e7d2d80094e29f6209b21c98abfb42852ca5c5..bda54e01b242c816a00f4c5ac258b0ea38fdf9d1 100644
--- a/extensions/browser/event_listener_map.cc
+++ b/extensions/browser/event_listener_map.cc
@@ -62,11 +62,11 @@ bool EventListener::IsLazy() const {
 }
 
 void EventListener::MakeLazy() {
-  process_ = NULL;
+  process_ = nullptr;
 }
 
 content::BrowserContext* EventListener::GetBrowserContext() const {
-  return process_ ? process_->GetBrowserContext() : NULL;
+  return process_ ? process_->GetBrowserContext() : nullptr;
 }
 
 EventListener::EventListener(const std::string& event_name,
@@ -198,7 +198,7 @@ void EventListenerMap::LoadUnfilteredLazyListeners(
   for (std::set<std::string>::const_iterator it = event_names.begin();
        it != event_names.end(); ++it) {
     AddListener(EventListener::ForExtension(
-        *it, extension_id, NULL, scoped_ptr<DictionaryValue>()));
+        *it, extension_id, nullptr, scoped_ptr<DictionaryValue>()));
   }
 }
 
@@ -207,15 +207,18 @@ void EventListenerMap::LoadFilteredLazyListeners(
     const DictionaryValue& filtered) {
   for (DictionaryValue::Iterator it(filtered); !it.IsAtEnd(); it.Advance()) {
     // We skip entries if they are malformed.
-    const base::ListValue* filter_list = NULL;
+    const base::ListValue* filter_list = nullptr;
     if (!it.value().GetAsList(&filter_list))
       continue;
     for (size_t i = 0; i < filter_list->GetSize(); i++) {
-      const DictionaryValue* filter = NULL;
+      const DictionaryValue* filter = nullptr;
       if (!filter_list->GetDictionary(i, &filter))
         continue;
-      AddListener(EventListener::ForExtension(
-          it.key(), extension_id, NULL, make_scoped_ptr(filter->DeepCopy())));
+      AddListener(
+          EventListener::ForExtension(it.key(),
+                                      extension_id,
+                                      nullptr,
+                                      make_scoped_ptr(filter->DeepCopy())));
     }
   }
 }