C++11 declares a type safe null pointer

content/common/gpu/image_transport_surface.cc

Index: content/common/gpu/image_transport_surface.cc
diff --git a/content/common/gpu/image_transport_surface.cc b/content/common/gpu/image_transport_surface.cc
index a1062dd91ff4a74adb165fde2ed2738912c56d62..dccd20c01d2c39d5392164613b543f32b55af7aa 100644
--- a/content/common/gpu/image_transport_surface.cc
+++ b/content/common/gpu/image_transport_surface.cc
@@ -45,7 +45,7 @@ scoped_refptr<gfx::GLSurface> ImageTransportSurface::CreateSurface(
   }
 
   if (!surface.get() || !surface->Initialize())
-    return NULL;
+    return nullptr;
   return surface;
 }
 
@@ -169,13 +169,13 @@ void ImageTransportHelper::SetSwapInterval(gfx::GLContext* context) {
 
 gpu::GpuScheduler* ImageTransportHelper::Scheduler() {
   if (!stub_.get())
-    return NULL;
+    return nullptr;
   return stub_->scheduler();
 }
 
 gpu::gles2::GLES2Decoder* ImageTransportHelper::Decoder() {
   if (!stub_.get())
-    return NULL;
+    return nullptr;
   return stub_->decoder();
 }