[C++11 Allowed Features] Declares a type-safe null pointer converting from NULL to nullptr in src/…

cc/layers/heads_up_display_layer_impl.cc

 // Copyright 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 "cc/layers/heads_up_display_layer_impl.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/debug/trace_event.h"
@@ skipping 322 matching lines @@
   paint->setColor(DebugColors::HUDIndicatorLineColor());
   paint->setXfermodeMode(SkXfermode::kPlus_Mode);
   const double indicator_top =
       bounds.height() * (1.0 - graph.indicator / graph.current_upper_bound) -
       1.0;
   canvas->drawLine(bounds.left(),
                    bounds.top() + indicator_top,
                    bounds.right(),
                    bounds.top() + indicator_top,
                    *paint);
-  paint->setXfermode(NULL);
+  paint->setXfermode(nullptr);
 }
 
 SkRect HeadsUpDisplayLayerImpl::DrawFPSDisplay(
     SkCanvas* canvas,
     const FrameRateCounter* fps_counter,
     int right,
     int top) const {
   const int kPadding = 4;
   const int kGap = 6;
 
@@ skipping 428 matching lines @@
   return "cc::HeadsUpDisplayLayerImpl";
 }
 
 void HeadsUpDisplayLayerImpl::AsValueInto(
     base::debug::TracedValue* dict) const {
   LayerImpl::AsValueInto(dict);
   dict->SetString("layer_name", "Heads Up Display Layer");
 }
 
 }  // namespace cc