MD-Settings: A11y - Label drop down menus.

chrome/browser/resources/settings/people_page/import_data_dialog.html

 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/md_select_css.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-spinner/paper-spinner.html">
 <link rel="import" href="../controls/settings_checkbox.html">
 <link rel="import" href="../controls/settings_toggle_button.html">
@@ skipping 36 matching lines @@
                 label="$i18n{showBookmarksBar}"
                 pref="{{prefs.bookmark_bar.show_on_all_tabs}}">
             </settings-toggle-button>
           </div>
         </div>
 
         <div hidden$="[[hasImportStatus_(
               importStatusEnum_.SUCCEEDED, importStatus_)]]">
           <span class="md-select-wrapper">
             <select id="browserSelect" class="md-select"
+                aria-label="$i18n{importFromLabel}"
                 on-change="onBrowserProfileSelectionChange_">
               <template is="dom-repeat" items="[[browserProfiles_]]">
                 <option value="[[item.index]]">[[item.name]]</option>
               </template>
             </select>
             <span class="md-select-underline"></span>
           </span>
           <div class="description">$i18n{importDescription}</div>
           <settings-checkbox
               hidden="[[!selected_.history]]"
@@ skipping 48 matching lines @@
 
         <paper-button id="done" class="action-button"
             hidden$="[[!hasImportStatus_(
                 importStatusEnum_.SUCCEEDED, importStatus_)]]"
             on-tap="closeDialog_">$i18n{done}</paper-button>
       </div>
     </dialog>
   </template>
   <script src="import_data_dialog.js"></script>
 </dom-module>