C++11 declares a type safe null pointer

content/common/gpu/media/vt_video_decode_accelerator.cc

Index: content/common/gpu/media/vt_video_decode_accelerator.cc
diff --git a/content/common/gpu/media/vt_video_decode_accelerator.cc b/content/common/gpu/media/vt_video_decode_accelerator.cc
index 8fb0b834bbfc0649e20ebf486f5a40964ea7035b..9f3ee3de73732476cabf3042ffc10bc290addf8c 100644
--- a/content/common/gpu/media/vt_video_decode_accelerator.cc
+++ b/content/common/gpu/media/vt_video_decode_accelerator.cc
@@ -68,9 +68,9 @@ VTVideoDecodeAccelerator::PendingAction::~PendingAction() {
 
 VTVideoDecodeAccelerator::VTVideoDecodeAccelerator(CGLContextObj cgl_context)
     : cgl_context_(cgl_context),
-      client_(NULL),
-      format_(NULL),
-      session_(NULL),
+      client_(nullptr),
+      format_(nullptr),
+      session_(nullptr),
       gpu_task_runner_(base::ThreadTaskRunnerHandle::Get()),
       weak_this_factory_(this),
       decoder_thread_("VTDecoderThread") {
@@ -253,7 +253,7 @@ void VTVideoDecodeAccelerator::DecodeTask(
     gpu_task_runner_->PostTask(FROM_HERE, base::Bind(
         &VTVideoDecodeAccelerator::OutputTask,
         weak_this_factory_.GetWeakPtr(),
-        DecodedFrame(bitstream.id(), NULL)));
+        DecodedFrame(bitstream.id(), nullptr)));
     return;
   }
 
@@ -261,10 +261,10 @@ void VTVideoDecodeAccelerator::DecodeTask(
   base::ScopedCFTypeRef<CMBlockBufferRef> data;
   CHECK(!CMBlockBufferCreateWithMemoryBlock(
       kCFAllocatorDefault,
-      NULL,                 // &memory_block
+      nullptr,                 // &memory_block
       data_size,            // block_length
       kCFAllocatorDefault,  // block_allocator
-      NULL,                 // &custom_block_source
+      nullptr,                 // &custom_block_source
       0,                    // offset_to_data
       data_size,            // data_length
       0,                    // flags
@@ -288,14 +288,14 @@ void VTVideoDecodeAccelerator::DecodeTask(
       kCFAllocatorDefault,
       data,                 // data_buffer
       true,                 // data_ready
-      NULL,                 // make_data_ready_callback
-      NULL,                 // make_data_ready_refcon
+      nullptr,                 // make_data_ready_callback
+      nullptr,                 // make_data_ready_refcon
       format_,              // format_description
       1,                    // num_samples
       0,                    // num_sample_timing_entries
-      NULL,                 // &sample_timing_array
+      nullptr,                 // &sample_timing_array
       0,                    // num_sample_size_entries
-      NULL,                 // &sample_size_array
+      nullptr,                 // &sample_size_array
       frame.InitializeInto()));
 
   // Asynchronous Decompression allows for parallel submission of frames
@@ -311,7 +311,7 @@ void VTVideoDecodeAccelerator::DecodeTask(
       frame,                                  // sample_buffer
       decode_flags,                           // decode_flags
       reinterpret_cast<void*>(bitstream_id),  // source_frame_refcon
-      NULL));                                 // &info_flags_out
+      nullptr));                                 // &info_flags_out
 }
 
 // This method may be called on any VideoToolbox thread.