Add search hint bubbles to Print Preview advanced options controls.

chrome/browser/resources/print_preview/settings/advanced_settings/advanced_settings_item.css

 /* 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. */
 
 .advanced-settings-item {
   cursor: default;
   display: table-row;
 }
 
 .advanced-settings-item > * {
   padding-bottom: 15px;
   padding-top: 10px;
 }
 
 .advanced-settings-item-label {
   -webkit-padding-end: 20px;
   display: table-cell;
-  line-height: 24px;
   overflow: hidden;
   text-overflow: ellipsis;
   vertical-align: middle;
   white-space: nowrap;
   width: 250px;
 }
 
 .advanced-settings-item-name .search-hint {
   -webkit-margin-start: 1em;
   color: #999;
   font-size: 75%;
 }
 
 .advanced-settings-item-query-highlight {
   background-color: rgba(255, 240, 120, 0.9);
 }
 
 .advanced-settings-item-value {
   display: table-cell;
-  line-height: 24px;
   overflow: hidden;
   text-overflow: ellipsis;
   vertical-align: middle;
   white-space: nowrap;
   width: 175px;
 }
 
+.advanced-settings-item-value-select-control {
+  line-height: 24px;
+}
+
 .advanced-settings-item-value-text-control {
   height: 28px;
+  line-height: 24px;
   width: 175px;
-}
+}