Add copies changes to prepare for scaling

chrome/browser/resources/print_preview/settings/settings_box.css

Index: chrome/browser/resources/print_preview/settings/settings_box.css
diff --git a/chrome/browser/resources/print_preview/settings/settings_box.css b/chrome/browser/resources/print_preview/settings/settings_box.css
new file mode 100644
index 0000000000000000000000000000000000000000..cf48b061b0030c349ab0a30a6de8ef33197d3ff3
--- /dev/null
+++ b/chrome/browser/resources/print_preview/settings/settings_box.css
@@ -0,0 +1,8 @@
+/* Copyright (c) 2016 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file. */
+
+.settings-box input.user-value.invalid {
+  background: rgb(255, 240, 240);
+  color: rgb(140, 20, 20);
+}