C++11 declares a type safe null pointer

content/common/font_list_win.cc

Index: content/common/font_list_win.cc
diff --git a/content/common/font_list_win.cc b/content/common/font_list_win.cc
index bc6c1dcd1ed296bc5f336dce9b4c7b9f8d17121b..fc34ea18a1dfd860281d75cef24400f0ecca916b 100644
--- a/content/common/font_list_win.cc
+++ b/content/common/font_list_win.cc
@@ -36,10 +36,10 @@ scoped_ptr<base::ListValue> GetFontList_SlowBlocking() {
   memset(&logfont, 0, sizeof(logfont));
   logfont.lfCharSet = DEFAULT_CHARSET;
 
-  HDC hdc = ::GetDC(NULL);
+  HDC hdc = ::GetDC(nullptr);
   ::EnumFontFamiliesExW(hdc, &logfont, (FONTENUMPROCW)&EnumFontFamExProc,
                         (LPARAM)&font_names, 0);
-  ::ReleaseDC(NULL, hdc);
+  ::ReleaseDC(nullptr, hdc);
 
   scoped_ptr<base::ListValue> font_list(new base::ListValue);
   std::set<base::string16>::iterator iter;