Add settings screen that lets a user setup a PIN to unlock their device with.

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

 <link rel="import" href="chrome://resources/cr_elements/icons.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/neon-animation/neon-animatable.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-checkbox/paper-checkbox.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
 <link rel="import" href="/controls/settings_checkbox.html">
 <link rel="import" href="/people_page/sync_page.html">
 <link rel="import" href="/people_page/profile_info_browser_proxy.html">
 <link rel="import" href="/people_page/sync_browser_proxy.html">
 <link rel="import" href="/settings_page/settings_animated_pages.html">
 <link rel="import" href="/settings_page/settings_subpage.html">
 <link rel="import" href="/settings_shared_css.html">
 
 <if expr="chromeos">
 <link rel="import" href="/people_page/change_picture.html">
 <link rel="import" href="/people_page/easy_unlock_browser_proxy.html">
 <link rel="import" href="/people_page/easy_unlock_turn_off_dialog.html">
 <link rel="import" href="/people_page/quick_unlock_authenticate.html">
 <link rel="import" href="/people_page/quick_unlock_choose_method.html">
+<link rel="import" href="/people_page/quick_unlock_setup_pin.html">
 <link rel="import" href="/people_page/users_page.html">
 </if>
 <if expr="not chromeos">
 <link rel="import" href="/people_page/manage_profile.html">
 </if>
 
 <dom-module id="settings-people-page">
   <template>
     <style include="settings-shared">
       setting-box.middle {
@@ skipping 219 matching lines @@
       </template>
       <template is="dom-if" name="quick-unlock-choose-method">
         <settings-subpage page-title="$i18n{quickUnlockTitle}">
           <settings-quick-unlock-choose-method
             set-modes="[[quickUnlockSetModes]]"
             current-route="{{currentRoute}}"
             prefs="{{prefs}}">
           </settings-quick-unlock-choose-method>
         </settings-subpage>
       </template>
+      <template is="dom-if" name="quick-unlock-setup-pin">
+        <settings-subpage page-title="$i18n{quickUnlockTitle}">
+          <settings-quick-unlock-setup-pin
+            set-modes="[[quickUnlockSetModes]]"
+            current-route="{{currentRoute}}">
+          </settings-quick-unlock-setup-pin>
+        </settings-subpage>
+      </template>
       <template is="dom-if" name="users">
         <settings-subpage page-title="$i18n{usersPageTitle}">
           <settings-users-page prefs="{{prefs}}"></settings-users-page>
         </settings-subpage>
       </template>
       <template is="dom-if" name="changePicture">
         <settings-subpage page-title="$i18n{changePictureTitle}">
           <settings-change-picture></settings-change-picture>
         </settings-subpage>
       </template>
@@ skipping 35 matching lines @@
 
 <if expr="chromeos">
     <template is="dom-if" if="[[easyUnlockEnabled_]]">
       <easy-unlock-turn-off-dialog id="easyUnlockTurnOffDialog">
       </easy-unlock-turn-off-dialog>
     </template>
 </if>
   </template>
   <script src="people_page.js"></script>
 </dom-module>