Add search hint bubbles to Print Preview advanced options controls.

chrome/browser/resources/print_preview/settings/advanced_settings/advanced_settings.js

 // Copyright 2014 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';
 
   /**
    * Modal dialog for print destination's advanced settings.
    * @param {!print_preview.PrintTicketStore} printTicketStore Contains the
@@ skipping 108 matching lines @@
           this.getChildElement('.settings-area').offsetTop -
           this.getChildElement('.action-area').offsetHeight;
     },
 
     /**
      * Filters displayed settings with the given query.
      * @param {?string} query Query to filter settings by.
      * @private
      */
     filterLists_: function(query) {
+      var lastVisibleItemWithBubble = null;
       this.items_.forEach(function(item) {
         item.updateSearchQuery(query);
+        if (item.searchBubbleShown)
+          lastVisibleItemWithBubble = item;
       });
+      setIsVisible(
+          this.getChildElement('.advanced-settings-item-extra-padding'),
+          !!lastVisibleItemWithBubble);
     },
 
     /**
      * Resets the filter query.
      * @private
      */
     resetSearch_: function() {
       this.searchBox_.setQuery(null);
       this.filterLists_(null);
     },
 
     /**
      * Renders all of the available settings.
      * @private
      */
     renderSettings_: function() {
       // Remove all children settings elements.
       this.items_.forEach(function(item) {
         this.removeChild(item);
       }.bind(this));
       this.items_ = [];
 
       var vendorCapabilities = this.printTicketStore_.vendorItems.capability;
       if (!vendorCapabilities)
         return;
 
       var availableHeight = this.getAvailableContentHeight_();
       var containerEl = this.getChildElement('.settings-area');
       containerEl.style.maxHeight = availableHeight + 'px';
+      var settingsEl = this.getChildElement('.settings');
 
       vendorCapabilities.forEach(function(capability) {
         var item = new print_preview.AdvancedSettingsItem(
             this.eventTarget_, this.printTicketStore_, capability);
         this.addChild(item);
-        item.render(this.getChildElement('.settings'));
+        item.render(settingsEl);
         this.items_.push(item);
       }.bind(this));
+
+      var extraPadding = document.createElement('div');
+      extraPadding.classList.add('advanced-settings-item-extra-padding');
+      extraPadding.hidden = true;
+      settingsEl.appendChild(extraPadding);
     },
 
     /**
      * Called when settings search query changes. Filters displayed settings
      * with the given query.
      * @param {Event} evt Contains search query.
      * @private
      */
     onSearch_: function(evt) {
       this.filterLists_(evt.queryRegExp);
@@ skipping 14 matching lines @@
 
       this.printTicketStore_.vendorItems.updateValue(values);
     }
   };
 
   // Export
   return {
     AdvancedSettings: AdvancedSettings
   };
 });