MD Settings: Restore focus after closing various dialogs.

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

 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_expand_button/cr_expand_button.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/icon.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-collapse/iron-collapse.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animatable.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
@@ skipping 284 matching lines @@
         <div id="manage-other-people-subpage-trigger"
             class="settings-box" on-tap="onManageOtherPeople_" actionable>
           <div class="start">$i18n{manageOtherPeople}</div>
           <button class="subpage-arrow" is="paper-icon-button-light"
               aria-label="$i18n{manageOtherPeople}"></button>
         </div>
 
 <if expr="not chromeos">
         <div class="settings-box" on-tap="onImportDataTap_" actionable>
           <div class="start">$i18n{importTitle}</div>
-          <button class="subpage-arrow" is="paper-icon-button-light"
-              aria-label="$i18n{importTitle}"></button>
+          <button id="importDataDialogTrigger" class="subpage-arrow"
+              is="paper-icon-button-light" aria-label="$i18n{importTitle}">
+          </button>
         </div>
 </if>
 
         <template is="dom-if" if="[[profileManagesSupervisedUsers_]]">
           <div id="manageSupervisedUsersContainer" class="settings-box two-line"
               on-tap="onManageSupervisedUsers_" actionable>
             <div class="start">
               $i18n{manageSupervisedUsers}
               <div class="secondary" id="manageSupervisedUsersSecondary">
                 $i18n{manageSupervisedUsersDescription}
@@ skipping 112 matching lines @@
 <if expr="chromeos">
     <template is="dom-if" if="[[showEasyUnlockTurnOffDialog_]]">
       <easy-unlock-turn-off-dialog id="easyUnlockTurnOffDialog"
           on-close="onEasyUnlockTurnOffDialogClose_">
       </easy-unlock-turn-off-dialog>
     </template>
 </if>
   </template>
   <script src="people_page.js"></script>
 </dom-module>