Print Preview: Show error message if text is typed in Copies section

chrome/browser/resources/print_preview/data/ticket_items/scaling.js

Index: chrome/browser/resources/print_preview/data/ticket_items/scaling.js
diff --git a/chrome/browser/resources/print_preview/data/ticket_items/scaling.js b/chrome/browser/resources/print_preview/data/ticket_items/scaling.js
index c7f3a37fb58fbc24f7c247fa2db982dd3a15bcf1..b5961dcec7cc96ebf07982f2b8889721ebe4ec0e 100644
--- a/chrome/browser/resources/print_preview/data/ticket_items/scaling.js
+++ b/chrome/browser/resources/print_preview/data/ticket_items/scaling.js
@@ -45,26 +45,14 @@ cr.define('print_preview.ticket_items', function() {
 
     /** @override */
     wouldValueBeValid: function(value) {
-      if (/[^\d]+/.test(value)) {
-        return false;
-      }
-      var scaling = parseInt(value, 10);
-      return scaling >= Scaling.MIN_VAL && scaling <= Scaling.MAX_VAL;
-    },
+      return true;

[dpapad, 2017/02/27 21:56:02]

Is this resulting in the same behavior as before?

[rbpotter, 2017/02/28 00:12:59]

It should be. This function was only called in isValid and in
scaling_settings. isValid was never called. scaling_settings now
checks validity.valid on the input.
This is different from copies because scaling is not allowed to update
to an invalid value since that would change the preview. Copies can
update to an invalid value, so isValid gets checked before the print
ticket gets sent for an actual print/before the print button is
enabled.

+   },
 
     /** @override */
     isValueEqual: function(value) {
       return this.getValueAsNumber() == value;
     },
 
-    /**
-     * @param {number} The desired scaling percentage.
-     * @return {number} Nearest valid scaling percentage
-     */
-    getNearestValidValue: function(value) {
-      return Math.min(Math.max(value, Scaling.MIN_VAL), Scaling.MAX_VAL);
-    },
-
     /** @override */
     isCapabilityAvailable: function() {
       // This is not a function of the printer, but should be disabled if we are