Perform printer setup on Chrome OS before selecting printer.

chrome/browser/resources/print_preview/native_layer.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.exportPath('print_preview');
 
 /**
  * @typedef {{selectSaveAsPdfDestination: boolean,
  *            layoutSettings.portrait: boolean,
  *            pageRange: string,
@@ skipping 53 matching lines @@
     global.onExtensionCapabilitiesSet =
         this.onExtensionCapabilitiesSet_.bind(this);
     global.onEnableManipulateSettingsForTest =
         this.onEnableManipulateSettingsForTest_.bind(this);
     global.printPresetOptionsFromDocument =
         this.onPrintPresetOptionsFromDocument_.bind(this);
     global.onProvisionalPrinterResolved =
         this.onProvisionalDestinationResolved_.bind(this);
     global.failedToResolveProvisionalPrinter =
         this.failedToResolveProvisionalDestination_.bind(this);
+    global.onPrinterSetup = this.onPrinterSetupResolved_.bind(this);
   };
 
   /**
    * Event types dispatched from the Chromium native layer.
    * @enum {string}
    * @const
    */
   NativeLayer.EventType = {
     ACCESS_TOKEN_READY: 'print_preview.NativeLayer.ACCESS_TOKEN_READY',
     CAPABILITIES_SET: 'print_preview.NativeLayer.CAPABILITIES_SET',
@@ skipping 20 matching lines @@
     PRIVET_PRINTER_CHANGED: 'print_preview.NativeLayer.PRIVET_PRINTER_CHANGED',
     PRIVET_CAPABILITIES_SET:
         'print_preview.NativeLayer.PRIVET_CAPABILITIES_SET',
     PRIVET_PRINT_FAILED: 'print_preview.NativeLayer.PRIVET_PRINT_FAILED',
     EXTENSION_PRINTERS_ADDED:
         'print_preview.NativeLayer.EXTENSION_PRINTERS_ADDED',
     EXTENSION_CAPABILITIES_SET:
         'print_preview.NativeLayer.EXTENSION_CAPABILITIES_SET',
     PRINT_PRESET_OPTIONS: 'print_preview.NativeLayer.PRINT_PRESET_OPTIONS',
     PROVISIONAL_DESTINATION_RESOLVED:
-        'print_preview.NativeLayer.PROVISIONAL_DESTINATION_RESOLVED'
+        'print_preview.NativeLayer.PROVISIONAL_DESTINATION_RESOLVED',
+    PRINTER_SETUP: 'print_preview.NativeLayer.PRINTER_SETUP'
   };
 
   /**
    * Constant values matching printing::DuplexMode enum.
    * @enum {number}
    */
   NativeLayer.DuplexMode = {
     SIMPLEX: 0,
     LONG_EDGE: 1,
     UNKNOWN_DUPLEX_MODE: -1
@@ skipping 100 matching lines @@
      * the resolved destination properties by calling
      * {@code onProvisionalPrinterResolved}, or in case of an error
      * {@code failedToResolveProvisionalPrinter}
      * @param {string} provisionalDestinationId
      */
     grantExtensionPrinterAccess: function(provisionalDestinationId) {
       chrome.send('grantExtensionPrinterAccess', [provisionalDestinationId]);
     },
 
     /**
+     * Requests that Chrome peform printer setup for the given printer.
+     * @param {string} printerId
+     */
+    setupPrinter: function(printerId) {
+      chrome.send('setupPrinter', [printerId]);

[dpapad, 2017/01/11 20:36:30]

Nit (optional): Instead of using chrome.send, exposing a global JS function,
calling that global JS function by name from C++, can you use the newer
cr.sendWithPromise() mechanism instead?

[skau, 2017/01/12 00:36:16]

Done.

+    },
+
+    /**
      * @param {!print_preview.Destination} destination Destination to print to.
      * @param {!print_preview.ticket_items.Color} color Color ticket item.
      * @return {number} Native layer color model.
      * @private
      */
     getNativeColorModel_: function(destination, color) {
       // For non-local printers native color model is ignored anyway.
       var option = destination.isLocal ? color.getSelectedOption() : null;
       var nativeColorModel = parseInt(option ? option.vendor_id : null, 10);
       if (isNaN(nativeColorModel)) {
@@ skipping 585 matching lines @@
      */
     failedToResolveProvisionalDestination_: function(destinationId) {
       var evt = new Event(
           NativeLayer.EventType.PROVISIONAL_DESTINATION_RESOLVED);
       evt.provisionalId = destinationId;
       evt.destination = null;
       this.dispatchEvent(evt);
     },
 
     /**
+     * Called when printer setup has been completed.
+     * @param {string} printerId The id of the printer in the backend.
+     * @param {boolean} success True if the setup was successful.
+     * @param {Object} capabilities A capabilities object suitable for
+     *     Destination.capabilities.
+     * @private
+     */
+    onPrinterSetupResolved_: function(printerId, success, capabilities) {
+      var evt = new Event(NativeLayer.EventType.PRINTER_SETUP);
+      evt.printerId = printerId;
+      evt.success = success;
+      evt.capabilities = capabilities;
+      this.dispatchEvent(evt);
+    },
+
+    /**
      * Called when Chrome reports that a provisional destination has been
      * successfully resolved.
      * Currently used only for extension provided destinations.
      * @param {string} provisionalDestinationId The provisional destination id.
      * @param {!{extensionId: string,
      *           extensionName: string,
      *           id: string,
      *           name: string,
      *           description: (string|undefined)}} destinationInfo The resolved
      *     destination info.
@@ skipping 245 matching lines @@
       return this.serializedDefaultDestinationSelectionRulesStr_;
     }
   };
 
   // Export
   return {
     NativeInitialSettings: NativeInitialSettings,
     NativeLayer: NativeLayer
   };
 });