gn format: penalty-based scheme for line breaking

tools/gn/format_test_data/047.golden

Index: tools/gn/format_test_data/047.golden
diff --git a/tools/gn/format_test_data/047.golden b/tools/gn/format_test_data/047.golden
new file mode 100644
index 0000000000000000000000000000000000000000..5217e762580b8410ae0ec431ad3b341f4a59c090
--- /dev/null
+++ b/tools/gn/format_test_data/047.golden
@@ -0,0 +1,10 @@
+if (true) {
+  args += [ "--template" ] +
+          rebase_path(remoting_webapp_template_files, template_rel_dir)
+  args += [
+    "--dir-for-templates",
+    rebase_path(template_rel_dir, root_build_dir),
+  ]
+  args += [ "--js" ] + rebase_path(remoting_webapp_main_html_js_files,
+                                   template_rel_dir_and_some_more)
+}