Hide printer status error text when configuring printer

When a printer is clicked in destination dialog, don't show the printer
status error messages while it's attempting to configure the printer.

The After screenshot shows:
1. Dialog initially opened with error status text
2. Clicking that printer to attempt to configure
3. Configuration failing

Before: http://screen/9FJ2jistunJS2Uy
After: http://screen/DbsdghWiGmf2UdZ

Bug: 1123754
Change-Id: I1a632e281070e38f070153f18fdfad674f126425
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2438638Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Gavin Williams <gavinwill@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812044}

chrome/browser/resources/print_preview/ui/destination_list_item.html

@@ -77,7 +77,7 @@
     <span class="search-hint searchable" hidden="[[!searchHint_]]">
       [[searchHint_]]
     </span>
-    <span class="connection-status">
+    <span class="connection-status" hidden="[[!statusText_]]">
       [[statusText_]]
     </span>
     <a href="$i18n{gcpCertificateErrorLearnMoreURL}"

chrome/browser/resources/print_preview/ui/destination_list_item.js

@@ -70,7 +70,8 @@ Polymer({
     statusText_: {
       type: String,
       computed:
-          'computeStatusText_(destination, destination.printerStatusReason)',
+          'computeStatusText_(destination, destination.printerStatusReason,' +
+              'configurationStatus_)',
     },
 
     // <if expr="chromeos">
@@ -211,6 +212,11 @@ Polymer({
     // <if expr="chromeos">
     if (this.printerStatusFlagEnabled_ &&
         this.destination.origin === DestinationOrigin.CROS) {
+      // Don't show status text when destination is configuring.
+      if (this.configurationStatus_ !== DestinationConfigStatus.IDLE) {
+        return '';
+      }
+
       const printerStatusReason = this.destination.printerStatusReason;
       if (!printerStatusReason ||
           printerStatusReason === PrinterStatusReason.NO_ERROR ||