C++11 declares a type safe null pointer

content/common/gpu/client/gpu_video_decode_accelerator_host.h

Index: content/common/gpu/client/gpu_video_decode_accelerator_host.h
diff --git a/content/common/gpu/client/gpu_video_decode_accelerator_host.h b/content/common/gpu/client/gpu_video_decode_accelerator_host.h
index 6eb1e51d720a77742c0a387e9aee085efe4d11df..2ce598d22911ae309f2471e1229fc1a92f7b259a 100644
--- a/content/common/gpu/client/gpu_video_decode_accelerator_host.h
+++ b/content/common/gpu/client/gpu_video_decode_accelerator_host.h
@@ -73,7 +73,7 @@ class GpuVideoDecodeAcceleratorHost
 
   // Unowned reference to the GpuChannelHost to send IPC messages to the GPU
   // process.  |channel_| outlives |impl_|, so the reference is always valid as
-  // long as it is not NULL.
+  // long as it is not nullptr.
   GpuChannelHost* channel_;
 
   // Route ID for the associated decoder in the GPU process.
@@ -84,7 +84,7 @@ class GpuVideoDecodeAcceleratorHost
 
   // Unowned reference to the CommandBufferProxyImpl that created us.  |this|
   // registers as a DeletionObserver of |impl_|, the so reference is always
-  // valid as long as it is not NULL.
+  // valid as long as it is not nullptr.
   CommandBufferProxyImpl* impl_;
 
   // Requested dimensions of the buffer, from ProvidePictureBuffers().