C++11 declares a type safe null pointer

content/common/cc_messages.cc

Index: content/common/cc_messages.cc
diff --git a/content/common/cc_messages.cc b/content/common/cc_messages.cc
index 8ecdf0c4cea1b95fc5bf773af522bedd696cdfd6..f1e2c91a48bfd1e6cd06f1ae2619de19f6c7c05a 100644
--- a/content/common/cc_messages.cc
+++ b/content/common/cc_messages.cc
@@ -388,7 +388,7 @@ static cc::DrawQuad* ReadDrawQuad(const Message* m,
                                   cc::RenderPass* render_pass) {
   QuadType* quad = render_pass->CreateAndAppendDrawQuad<QuadType>();
   if (!ReadParam(m, iter, quad))
-    return NULL;
+    return nullptr;
   return quad;
 }
 
@@ -421,7 +421,7 @@ bool ParamTraits<cc::RenderPass>::Read(
     if (!ReadParam(m, &temp_iter, &material))
       return false;
 
-    cc::DrawQuad* draw_quad = NULL;
+    cc::DrawQuad* draw_quad = nullptr;
     switch (material) {
       case cc::DrawQuad::CHECKERBOARD:
         draw_quad = ReadDrawQuad<cc::CheckerboardDrawQuad>(m, iter, p);