gn format: penalty-based scheme for line breaking

tools/gn/format_test_data/046.golden

Index: tools/gn/format_test_data/046.golden
diff --git a/tools/gn/format_test_data/046.golden b/tools/gn/format_test_data/046.golden
new file mode 100644
index 0000000000000000000000000000000000000000..7d2a679c18d453c1638c475d136139c4e932193f
--- /dev/null
+++ b/tools/gn/format_test_data/046.golden
@@ -0,0 +1,19 @@
+# 80 ---------------------------------------------------------------------------
+if (true) {
+  # The JavaScript files required by main.html.
+  remoting_webapp_main_html_js_files =
+      # Include the core files first as it is required by the other files.
+      # Otherwise, Jscompile will complain.
+      remoting_webapp_js_core_files +
+      remoting_webapp_js_auth_client2host_files +
+      remoting_webapp_js_auth_google_files + remoting_webapp_js_client_files +
+      remoting_webapp_js_gnubby_auth_files +
+      remoting_webapp_js_cast_extension_files + remoting_webapp_js_host_files +
+      remoting_webapp_js_logging_files + remoting_webapp_js_ui_files +
+      remoting_webapp_js_ui_host_control_files +
+      remoting_webapp_js_ui_host_display_files +
+      remoting_webapp_js_wcs_container_files
+  # Uncomment this line to include browser test files in the web app
+  # to expedite debugging or local development.
+  #+ remoting_webapp_js_browser_test_files
+}