"up-to-date" should only use hyphens when used as compound modifier of a noun

cc/trees/property_tree_builder.cc

Index: cc/trees/property_tree_builder.cc
diff --git a/cc/trees/property_tree_builder.cc b/cc/trees/property_tree_builder.cc
index f5ca6dba49da91aa19e8a2266a9772f8913b36e9..ec622386bf8ef025e6e4184861ea2b10de1d2179 100644
--- a/cc/trees/property_tree_builder.cc
+++ b/cc/trees/property_tree_builder.cc
@@ -1270,7 +1270,7 @@ void BuildPropertyTreesTopLevelInternal(
   BuildPropertyTreesInternal(root_layer, data_for_recursion, &data_from_child);
   property_trees->needs_rebuild = false;
 
-  // The transform tree is kept up-to-date as it is built, but the
+  // The transform tree is kept up to date as it is built, but the
   // combined_clips stored in the clip tree and the screen_space_opacity and
   // is_drawn in the effect tree aren't computed during tree building.
   property_trees->transform_tree.set_needs_update(false);