C++11 declares a type safe null pointer

content/common/gpu/stream_texture_android.cc

 // Copyright (c) 2013 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 "content/common/gpu/stream_texture_android.h"
 
 #include "base/bind.h"
 #include "content/common/android/surface_texture_peer.h"
 #include "content/common/gpu/gpu_channel.h"
 #include "content/common/gpu/gpu_messages.h"
@@ skipping 70 matching lines @@
 StreamTexture::~StreamTexture() {
   if (owner_stub_) {
     owner_stub_->RemoveDestructionObserver(this);
     owner_stub_->channel()->RemoveRoute(route_id_);
   }
 }
 
 void StreamTexture::OnWillDestroyStub() {
   owner_stub_->RemoveDestructionObserver(this);
   owner_stub_->channel()->RemoveRoute(route_id_);
-  owner_stub_ = NULL;
+  owner_stub_ = nullptr;
 
   // If the owner goes away, there is no need to keep the SurfaceTexture around.
   // The GL texture will keep working regardless with the currently bound frame.
-  surface_texture_ = NULL;
+  surface_texture_ = nullptr;
 }
 
 void StreamTexture::Destroy(bool have_context) {
   NOTREACHED();
 }
 
 void StreamTexture::WillUseTexImage() {
   if (!owner_stub_ || !surface_texture_.get())
     return;
 
   if (has_pending_frame_) {
     scoped_ptr<ui::ScopedMakeCurrent> scoped_make_current;
     bool needs_make_current =
-        !owner_stub_->decoder()->GetGLContext()->IsCurrent(NULL);
+        !owner_stub_->decoder()->GetGLContext()->IsCurrent(nullptr);
     // On Android we should not have to perform a real context switch here when
     // using virtual contexts.
     DCHECK(!needs_make_current || !owner_stub_->decoder()
                                        ->GetContextGroup()
                                        ->feature_info()
                                        ->workarounds()
                                        .use_virtualized_gl_contexts);
     if (needs_make_current) {
       scoped_make_current.reset(new ui::ScopedMakeCurrent(
           owner_stub_->decoder()->GetGLContext(), owner_stub_->surface()));
@@ skipping 89 matching lines @@
 bool StreamTexture::ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
                                          int z_order,
                                          gfx::OverlayTransform transform,
                                          const gfx::Rect& bounds_rect,
                                          const gfx::RectF& crop_rect) {
   NOTREACHED();
   return false;
 }
 
 }  // namespace content