Perform printer setup on Chrome OS before selecting printer.

chrome/browser/resources/print_preview/native_layer.js

Index: chrome/browser/resources/print_preview/native_layer.js
diff --git a/chrome/browser/resources/print_preview/native_layer.js b/chrome/browser/resources/print_preview/native_layer.js
index e0c54bc360b0fe104d2f383b49db9cabe8577fe0..dd3e72ef6658b2afa59ced6d9a5b9193d51658de 100644
--- a/chrome/browser/resources/print_preview/native_layer.js
+++ b/chrome/browser/resources/print_preview/native_layer.js
@@ -71,6 +71,7 @@ cr.define('print_preview', function() {
         this.onProvisionalDestinationResolved_.bind(this);
     global.failedToResolveProvisionalPrinter =
         this.failedToResolveProvisionalDestination_.bind(this);
+    global.onPrinterSetup = this.onPrinterSetupResolved_.bind(this);
   };
 
   /**
@@ -111,7 +112,8 @@ cr.define('print_preview', function() {
         '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'
   };
 
   /**
@@ -232,6 +234,14 @@ cr.define('print_preview', function() {
     },
 
     /**
+     * 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.
@@ -837,6 +847,22 @@ cr.define('print_preview', function() {
     },
 
     /**
+     * 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.