Settings to control Add Person and Browse as Guest.

chrome/browser/resources/options/browser_options.html

 <div id="settings" class="page" hidden>
   <header>
     <h1 i18n-content="settingsTitle"></h1>
   </header>
   <include src="automatic_settings_reset_banner.html">
 <if expr="chromeos">
   <include src="secondary_user_banner.html">
   <section>
     <div id="network-section-header" class="section-header">
       <h3 i18n-content="sectionTitleInternet"></h3>
@@ skipping 190 matching lines @@
   <section id="sync-users-section" guest-visibility="hidden">
     <h3 i18n-content="sectionTitleUsers"></h3>
 <if expr="chromeos">
     <include src="sync_section.html">
 </if>
     <div id="profiles-section" hidden>
       <list id="profiles-list" class="settings-list" hidden></list>
       <div id="profiles-single-message" class="settings-row"
           i18n-content="profilesSingleUser">
       </div>
+<if expr="not chromeos">
+      <div id="profiles-enable-guest" class="checkbox">
+        <input id="profile-browser-guest-enable"
+            pref="profile.browser_guest_enabled" type="checkbox">

[Marc Treib, 2014/09/01 08:49:53]

Hm, I think a supervised user could change the prefs by using the inspector and
un-hiding the checkboxes. Is there another line of defense apart from hiding the
UI?

[Mike Lerman, 2014/09/02 16:58:29]

Yes, found one! Done.

+        <span>
+          <label for="browser-guest-enable"

[Evan Stade, 2014/08/30 01:15:36]

structure should be

<label> // no for=
  <input>
  <span>
</label>

The way you currently have it, clicking the space between checkbox and text
doesn't toggle the setting.

[Mike Lerman, 2014/09/02 16:58:29]

Done.

+              i18n-content="profileBrowserGuestEnable">
+          </label>
+        </span>
+      </div>
+      <div id="profiles-enable-add-person" class="checkbox">
+        <input id="profile-add-person-enable"
+            pref="profile.add_person_enabled" type="checkbox">
+        <span>
+          <label for="add-person-enable"
+              i18n-content="profileAddPersonEnable">
+          </label>
+        </span>
+      </div>
+</if>
       <div id="profiles-buttons">
         <button id="profiles-create" i18n-content="profilesCreate"></button>
 <if expr="enable_settings_app">
         <button id="profiles-app-list-switch"
             i18n-content="profilesAppListSwitch" hidden>
         </button>
 </if>
         <button id="profiles-manage" i18n-content="profilesManage" disabled>
         </button>
         <button id="profiles-delete" i18n-content="profilesDelete"></button>
@@ skipping 755 matching lines @@
     <button id="advanced-settings-expander" class="link-button"
         i18n-content="showAdvancedSettings">
     </button>
 <if expr="chromeos">
     <button id="version-button" class="link-button" hidden
         i18n-content="browserVersion">
     </button>
 </if>
   </footer>
 </div>