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

cc/trees/tree_synchronizer.cc

 // Copyright 2011 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/trees/tree_synchronizer.h"
 
 #include <set>
 
 #include "base/containers/hash_tables.h"
 #include "base/containers/scoped_ptr_hash_map.h"
@@ skipping 145 matching lines @@
 
   ScrollbarLayerType* scrollbar_layer = layer->ToScrollbarLayer();
   if (!scrollbar_layer)
     return;
 
   RawPtrLayerImplMap::const_iterator iter =
       new_layers->find(layer->id());
   ScrollbarLayerImplBase* scrollbar_layer_impl =
       iter != new_layers->end()
           ? static_cast<ScrollbarLayerImplBase*>(iter->second)
-          : NULL;
+          : nullptr;
   DCHECK(scrollbar_layer_impl);
 
   scrollbar_layer->PushScrollClipPropertiesTo(scrollbar_layer_impl);
 }
 
 void UpdateScrollbarLayerPointersRecursive(const RawPtrLayerImplMap* new_layers,
                                            Layer* layer) {
   UpdateScrollbarLayerPointersRecursiveInternal<Layer, ScrollbarLayerInterface>(
       new_layers, layer);
 }
@@ skipping 125 matching lines @@
 #endif
 }
 
 void TreeSynchronizer::PushProperties(LayerImpl* layer, LayerImpl* layer_impl) {
   size_t num_dependents_need_push_properties = 0;
   PushPropertiesInternal(
       layer, layer_impl, &num_dependents_need_push_properties);
 }
 
 }  // namespace cc