C++11 declares a type safe null pointer

content/common/set_process_title_linux.cc

Index: content/common/set_process_title_linux.cc
diff --git a/content/common/set_process_title_linux.cc b/content/common/set_process_title_linux.cc
index c5043806c11df10db83ea41d0f30a990426eb2d1..b6bfa5b5a9deeb7a59ad442299a255c758d22484 100644
--- a/content/common/set_process_title_linux.cc
+++ b/content/common/set_process_title_linux.cc
@@ -9,7 +9,7 @@
 // environment variables to processes. First, there are two char* arrays stored
 // one after another: argv and environ. A pointer to argv is passed to main(),
 // while glibc sets the global variable |environ| to point at the latter. Both
-// of these arrays are terminated by a NULL pointer; the environment array is
+// of these arrays are terminated by a nullptr pointer; the environment array is
 // also followed by some empty space to allow additional variables to be added.
 //
 // These arrays contain pointers to a second location in memory, where the
@@ -47,15 +47,15 @@
 
 extern char** environ;
 
-static char** g_main_argv = NULL;
-static char* g_orig_argv0 = NULL;
+static char** g_main_argv = nullptr;
+static char* g_orig_argv0 = nullptr;
 
 void setproctitle(const char* fmt, ...) {
   va_list ap;
   size_t i, avail_size;
   uintptr_t page_size, page, page_end;
   // Sanity check before we try and set the process title.
-  // The BSD version allows fmt == NULL to restore the original title.
+  // The BSD version allows fmt == nullptr to restore the original title.
   if (!g_main_argv || !environ || !fmt)
     return;
   if (!g_orig_argv0) {
@@ -98,7 +98,7 @@ void setproctitle(const char* fmt, ...) {
       vsnprintf(g_main_argv[0] + size, avail_size - size, fmt, ap);
   }
   va_end(ap);
-  g_main_argv[1] = NULL;
+  g_main_argv[1] = nullptr;
 }
 
 // A version of this built into glibc would not need this function, since