Add copies changes to prepare for scaling

chrome/test/data/webui/print_preview.js

Index: chrome/test/data/webui/print_preview.js
diff --git a/chrome/test/data/webui/print_preview.js b/chrome/test/data/webui/print_preview.js
index bf411ed8c8c76bfa85bb63d82ff2a9ed7ec2f061..286a6f806daf2440b286ba08cbdce6f4b585970d 100644
--- a/chrome/test/data/webui/print_preview.js
+++ b/chrome/test/data/webui/print_preview.js
@@ -573,7 +573,7 @@ TEST_F('PrintPreviewWebUITest', 'CheckNumCopiesPrintPreset', function() {
   checkSectionVisible($('copies-settings'), true);
   expectEquals(
       printPresetOptions.copies,
-      parseInt($('copies-settings').querySelector('.copies').value));
+      parseInt($('copies-settings').querySelector('.user-value').value));
 
   this.waitForAnimationToEnd('other-options-collapsible');
 });