Perform printer setup on Chrome OS before selecting printer.

chrome/browser/resources/print_preview/data/destination_store.js

 // Copyright (c) 2012 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.
 
 cr.define('print_preview', function() {
   'use strict';
 
   /**
    * A data store that stores destinations and dispatches events when the data
    * store changes.
@@ skipping 758 matching lines @@
      *     destination.
      * @param {string} extensionName Extension name associated with this
      *     destination.
      * @private
      */
     fetchPreselectedDestination_: function(
         origin, id, account, name, capabilities, extensionId, extensionName) {
       this.autoSelectMatchingDestination_ =
           this.createExactDestinationMatch_(origin, id);
 
-      if (origin == print_preview.Destination.Origin.LOCAL) {
+      if (origin == print_preview.Destination.Origin.LOCAL ||
+          origin == print_preview.Destination.Origin.CROS) {
         this.nativeLayer_.startGetLocalDestinationCapabilities(id);
         return true;
       }
 
       if (this.cloudPrintInterface_ &&
           (origin == print_preview.Destination.Origin.COOKIES ||
            origin == print_preview.Destination.Origin.DEVICE)) {
         this.cloudPrintInterface_.printer(id, origin, account);
         return true;
       }
@@ skipping 105 matching lines @@
       if (!isLocal && !isCloud) {
         console.error('Unsupported type: "' + matchRules.kind + '"');
         return null;
       }
 
       var origins = [];
       if (isLocal) {
         origins.push(print_preview.Destination.Origin.LOCAL);
         origins.push(print_preview.Destination.Origin.PRIVET);
         origins.push(print_preview.Destination.Origin.EXTENSION);
+        origins.push(print_preview.Destination.Origin.CROS);
       }
       if (isCloud) {
         origins.push(print_preview.Destination.Origin.COOKIES);
         origins.push(print_preview.Destination.Origin.DEVICE);
         origins.push(print_preview.Destination.Origin.PROFILE);
       }
 
       var idRegExp = null;
       try {
         if (matchRules.idPattern) {
@@ skipping 161 matching lines @@
           this.cloudPrintInterface_.printer(
               destination.id, destination.origin, destination.account);
         }
       } else {
         cr.dispatchSimpleEvent(
             this,
             DestinationStore.EventType.SELECTED_DESTINATION_CAPABILITIES_READY);
       }
     },
 
+    resolveCrosDestination: function(destination) {
+      this.nativeLayer_.setupPrinter(destination.id);
+    },
+
     /**
      * Attempts to resolve a provisional destination.
      * @param {!print_preview.Destination} destinaion Provisional destination
      *     that should be resolved.
      */
     resolveProvisionalDestination: function(destination) {
       assert(
           destination.provisionalType ==
               print_preview.Destination.ProvisionalType.NEEDS_USB_PERMISSION,
           'Provisional type cannot be resolved.');
@@ skipping 169 matching lines @@
         this.insertIntoStore_(destination);
 
       var event = new Event(
           DestinationStore.EventType.PROVISIONAL_DESTINATION_RESOLVED);
       event.provisionalId = evt.provisionalId;
       event.destination = destination;
       this.dispatchEvent(event);
     },
 
     /**
+     * Handle the result of a PRINTER_SETUP request.
+     * @param {!Event} evt event carrying the results.
+     * @private
+     */
+    handleCrosDestinationResolved_: function(evt) {
+      var event = new Event(
+          DestinationStore.EventType.PRINTER_CONFIGURED);

[xdai1, 2016/12/30 00:38:13]

Seems there is no DestinationStore.EventType.PRINTER_CONFIGURED type?

[skau, 2017/01/04 18:57:06]

Looks like it was left out of the CL somehow.  It's there now.

+      event.printerId = evt.printerId;
+      event.capabilities = evt.capabilities;
+      event.success = evt.success;
+      this.dispatchEvent(event);
+    },
+
+    /**
      * Inserts {@code destination} to the data store and dispatches a
      * DESTINATIONS_INSERTED event.
      * @param {!print_preview.Destination} destination Print destination to
      *     insert.
      * @private
      */
     insertDestination_: function(destination) {
       if (this.insertIntoStore_(destination)) {
         this.destinationsInserted_(destination);
       }
@@ skipping 164 matching lines @@
           print_preview.NativeLayer.EventType.EXTENSION_PRINTERS_ADDED,
           this.onExtensionPrintersAdded_.bind(this));
       this.tracker_.add(
           this.nativeLayer_,
           print_preview.NativeLayer.EventType.EXTENSION_CAPABILITIES_SET,
           this.onExtensionCapabilitiesSet_.bind(this));
       this.tracker_.add(
           this.nativeLayer_,
           print_preview.NativeLayer.EventType.PROVISIONAL_DESTINATION_RESOLVED,
           this.handleProvisionalDestinationResolved_.bind(this));
+      this.tracker_.add(
+          this.nativeLayer_,
+          print_preview.NativeLayer.EventType.PRINTER_SETUP,
+          this.handleCrosDestinationResolved_.bind(this));
     },
 
     /**
      * Creates a local PDF print destination.
      * @return {!print_preview.Destination} Created print destination.
      * @private
      */
     createLocalPdfPrintDestination_: function() {
       // TODO(alekseys): Create PDF printer in the native code and send its
       // capabilities back with other local printers.
@@ skipping 276 matching lines @@
       return this.getDestinationKey_(
           destination.origin, destination.id, destination.account);
     }
   };
 
   // Export
   return {
     DestinationStore: DestinationStore
   };
 });