GN: Separately track labels and origins for lists of stuff

tools/gn/ninja_target_writer.cc

Index: tools/gn/ninja_target_writer.cc
diff --git a/tools/gn/ninja_target_writer.cc b/tools/gn/ninja_target_writer.cc
index a7bd6cc32e454d2bb75f0de1dea5b6757a42411d..d73c873271d0784a252be41dea5e7b866b6ff663 100644
--- a/tools/gn/ninja_target_writer.cc
+++ b/tools/gn/ninja_target_writer.cc
@@ -102,12 +102,12 @@ std::string NinjaTargetWriter::GetSourcesImplicitDeps() const {
   }
 
   // Add on any direct deps marked as "hard".
-  const std::vector<const Target*>& deps = target_->deps();
+  const LabelTargetVector& deps = target_->deps();
   for (size_t i = 0; i < deps.size(); i++) {
-    if (deps[i]->hard_dep()) {
+    if (deps[i].ptr->hard_dep()) {
       has_files = true;
       ret << " ";
-      path_output_.WriteFile(ret, helper_.GetTargetOutputFile(deps[i]));
+      path_output_.WriteFile(ret, helper_.GetTargetOutputFile(deps[i].ptr));
     }
   }