Replace more for loops in GN

tools/gn/function_get_target_outputs.cc

Index: tools/gn/function_get_target_outputs.cc
diff --git a/tools/gn/function_get_target_outputs.cc b/tools/gn/function_get_target_outputs.cc
index e3a63eeca6b6b45dadc1366fa9d350988169d2cc..163b187d82049940c772f5b7db868d91c656ca42 100644
--- a/tools/gn/function_get_target_outputs.cc
+++ b/tools/gn/function_get_target_outputs.cc
@@ -92,8 +92,8 @@ Value RunGetTargetOutputs(Scope* scope,
     *err = Err(function, "No targets defined in this context.");
     return Value();
   }
-  for (size_t i = 0; i < collector->size(); i++) {
-    const Item* item = (*collector)[i]->get();
+  for (const auto& cur : *collector) {
+    const Item* item = cur->get();
     if (item->label() != label)
       continue;
 
@@ -132,8 +132,8 @@ Value RunGetTargetOutputs(Scope* scope,
   // Convert to Values.
   Value ret(function, Value::LIST);
   ret.list_value().reserve(files.size());
-  for (size_t i = 0; i < files.size(); i++)
-    ret.list_value().push_back(Value(function, files[i].value()));
+  for (const auto& file : files)
+    ret.list_value().push_back(Value(function, file.value()));
 
   return ret;
 }