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

cc/resources/raster_tile_priority_queue.cc

Index: cc/resources/raster_tile_priority_queue.cc
diff --git a/cc/resources/raster_tile_priority_queue.cc b/cc/resources/raster_tile_priority_queue.cc
index 64a4a913ebfa78cfd4444f2b9b62a52ccad50d96..1a27f5a54fd891584d7c869f744c16dac683e9ad 100644
--- a/cc/resources/raster_tile_priority_queue.cc
+++ b/cc/resources/raster_tile_priority_queue.cc
@@ -201,7 +201,7 @@ void RasterTilePriorityQueue::PairedPictureLayerQueue::Pop(
       // Accept a shared tile if the next tree is the higher priority one
       // corresponding the iterator (active or pending) which usually (but due
       // to spiral iterators not always) returns the shared tile first.
-      if (next_tree == HigherPriorityTree(tree_priority, NULL, NULL, tile))
+      if (next_tree == HigherPriorityTree(tree_priority, NULL, nullptr, tile))
         break;
     }
   }
@@ -223,7 +223,7 @@ RasterTilePriorityQueue::PairedPictureLayerQueue::NextTileIteratorTree(
 
   // Now both iterators have tiles, so we have to decide based on tree priority.
   return HigherPriorityTree(
-      tree_priority, &active_iterator, &pending_iterator, NULL);
+      tree_priority, &active_iterator, &pending_iterator, nullptr);
 }
 
 }  // namespace cc