C++11 declares a type safe null pointer

content/common/gpu/media/vaapi_video_decode_accelerator.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
@@ skipping 192 matching lines @@
 }
 
 bool VaapiVideoDecodeAccelerator::TFPPicture::Bind() {
   DCHECK(CalledOnValidThread());
   DCHECK(x_pixmap_);
   DCHECK(glx_pixmap_);
   if (!make_context_current_.Run())
     return false;
 
   gfx::ScopedTextureBinder texture_binder(GL_TEXTURE_2D, texture_id_);
-  glXBindTexImageEXT(x_display_, glx_pixmap_, GLX_FRONT_LEFT_EXT, NULL);
+  glXBindTexImageEXT(x_display_, glx_pixmap_, GLX_FRONT_LEFT_EXT, nullptr);
 
   return true;
 }
 
 VaapiVideoDecodeAccelerator::TFPPicture*
     VaapiVideoDecodeAccelerator::TFPPictureById(int32 picture_buffer_id) {
   TFPPictures::iterator it = tfp_pictures_.find(picture_buffer_id);
   if (it == tfp_pictures_.end()) {
     LOG(ERROR) << "Picture id " << picture_buffer_id << " does not exist";
-    return NULL;
+    return nullptr;
   }
 
   return it->second.get();
 }
 
 VaapiVideoDecodeAccelerator::VaapiVideoDecodeAccelerator(
     Display* x_display,
     const base::Callback<bool(void)>& make_context_current)
     : x_display_(x_display),
       make_context_current_(make_context_current),
@@ skipping 683 matching lines @@
   DCHECK_EQ(message_loop_, base::MessageLoop::current());
   Cleanup();
   delete this;
 }
 
 bool VaapiVideoDecodeAccelerator::CanDecodeOnIOThread() {
   return false;
 }
 
 }  // namespace content