C++11 declares a type safe null pointer

content/common/resource_messages.cc

Index: content/common/resource_messages.cc
diff --git a/content/common/resource_messages.cc b/content/common/resource_messages.cc
index 1e7632db9ea7925423f22a7a9d584004e8fa5c51..98d843699ae1c8ea1c0816b0f2b8300fe4803fbd 100644
--- a/content/common/resource_messages.cc
+++ b/content/common/resource_messages.cc
@@ -11,7 +11,7 @@ namespace IPC {
 
 void ParamTraits<scoped_refptr<net::HttpResponseHeaders> >::Write(
     Message* m, const param_type& p) {
-  WriteParam(m, p.get() != NULL);
+  WriteParam(m, p.get() != nullptr);
   if (p.get()) {
     // Do not disclose Set-Cookie headers over IPC.
     p->Persist(m, net::HttpResponseHeaders::PERSIST_SANS_COOKIES);
@@ -135,7 +135,7 @@ void ParamTraits<storage::DataElement>::Log(const param_type& p,
 
 void ParamTraits<scoped_refptr<content::ResourceDevToolsInfo> >::Write(
     Message* m, const param_type& p) {
-  WriteParam(m, p.get() != NULL);
+  WriteParam(m, p.get() != nullptr);
   if (p.get()) {
     WriteParam(m, p->http_status_code);
     WriteParam(m, p->http_status_text);
@@ -261,7 +261,7 @@ void ParamTraits<net::LoadTimingInfo>::Log(const param_type& p,
 void ParamTraits<scoped_refptr<content::ResourceRequestBody> >::Write(
     Message* m,
     const param_type& p) {
-  WriteParam(m, p.get() != NULL);
+  WriteParam(m, p.get() != nullptr);
   if (p.get()) {
     WriteParam(m, *p->elements());
     WriteParam(m, p->identifier());