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

cc/base/swap_promise_monitor.h

Index: cc/base/swap_promise_monitor.h
diff --git a/cc/base/swap_promise_monitor.h b/cc/base/swap_promise_monitor.h
index b8c8cd05b8a557c0a4cf5e49e218fc7e8938ddc6..cf06bee24492f6a4f97b6e3802b6725216808a6c 100644
--- a/cc/base/swap_promise_monitor.h
+++ b/cc/base/swap_promise_monitor.h
@@ -24,9 +24,9 @@ class LayerTreeHostImpl;
 class CC_EXPORT SwapPromiseMonitor {
  public:
   // If the monitor lives on the main thread, pass in layer_tree_host
-  // and set layer_tree_host_impl to NULL.
+  // and set layer_tree_host_impl to nullptr.
   // If the monitor lives on the impl thread, pass in layer_tree_host_impl
-  // and set layer_tree_host to NULL.
+  // and set layer_tree_host to nullptr.
   SwapPromiseMonitor(LayerTreeHost* layer_tree_host,
                      LayerTreeHostImpl* layer_tree_host_impl);
   virtual ~SwapPromiseMonitor();