GN: don't write separate files for non-binary targets

tools/gn/command_refs.cc

Index: tools/gn/command_refs.cc
diff --git a/tools/gn/command_refs.cc b/tools/gn/command_refs.cc
index 64969b9e80dcbddfe9fef4e2da7f929fec2bc5cb..184f9014ae4b23813b32927a8cc92ea26e75468d 100644
--- a/tools/gn/command_refs.cc
+++ b/tools/gn/command_refs.cc
@@ -33,7 +33,7 @@ typedef std::multimap<const Target*, const Target*> DepMap;
 
 // Populates the reverse dependency map for the targets in the Setup.
 void FillDepMap(Setup* setup, DepMap* dep_map) {
-  for (auto* target : setup->builder()->GetAllResolvedTargets()) {
+  for (auto* target : setup->builder().GetAllResolvedTargets()) {
     for (const auto& dep_pair : target->GetDeps(Target::DEPS_ALL))
       dep_map->insert(std::make_pair(dep_pair.ptr, target));
   }
@@ -443,7 +443,7 @@ int RunRefs(const std::vector<std::string>& args) {
   // the output, while for normal targets you don't want to see the inputs,
   // only what refers to them.
   std::vector<const Target*> all_targets =
-      setup->builder()->GetAllResolvedTargets();
+      setup->builder().GetAllResolvedTargets();
   UniqueVector<const Target*> explicit_target_matches;
   for (const auto& file : file_matches) {
     GetTargetsContainingFile(setup, all_targets, file, all_toolchains,