UMA Histograms for Register Promos

chrome/browser/resources/print_preview/print_preview.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.
 
 // TODO(rltoscano): Move data/* into print_preview.data namespace
 
 var localStrings = new LocalStrings(templateData);
 
 <include src="component.js"/>
 
@@ skipping 686 matching lines @@
      */
     onCancelButtonClick_: function() {
       this.close_();
     },
 
     /**
      * Called when the register promo for Cloud Print is clicked.
      * @private
      */
      onCloudPrintRegisterPromoClick_: function(e) {
+       this.metrics_.incrementDestinationSearchBucket(
+         print_preview.Metrics.DestinationSearchBucket.REGISTER_PROMO_SELECTED);
        var devicesUrl = 'chrome://devices/register?id=' + e.destination.id;
        this.nativeLayer_.startForceOpenNewTab(devicesUrl);
        this.destinationStore_.waitForRegister(e.destination.id);
      },
 
     /**
      * Consume escape key presses and ctrl + shift + p. Delegate everything else
      * to the preview area.
      * @param {KeyboardEvent} e The keyboard event.
      * @private
@@ skipping 257 matching lines @@
 <include src="search/recent_destination_list.js"/>
 <include src="search/destination_list_item.js"/>
 <include src="search/destination_search.js"/>
 <include src="search/search_box.js"/>
 <include src="search/fedex_tos.js"/>
 
 window.addEventListener('DOMContentLoaded', function() {
   printPreview = new print_preview.PrintPreview();
   printPreview.initialize();
 });