Hide supervised user creation from UserManager when force sign in is enabled.

chrome/browser/resources/md_user_manager/create_profile.html

 <link rel="import" href="/import_supervised_user.html">
 <link rel="import" href="/profile_browser_proxy.html">
 <link rel="import" href="/shared_styles.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_profile_avatar_selector/cr_profile_avatar_selector.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/action_link.html">
 <link rel="import" href="chrome://resources/html/cr.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/util.html">
@@ skipping 146 matching lines @@
       <paper-input id="nameInput" value="{{profileName_}}" pattern=".*\S.*"
           no-label-float auto-validate>
       </paper-input>
       <cr-profile-avatar-selector avatars="[[availableIcons_]]"
           selected-avatar-url="{{profileIconUrl_}}">
       </cr-profile-avatar-selector>
       <paper-checkbox id="createShortcutCheckbox" checked="{{createShortcut_}}"
           hidden="[[!isProfileShortcutsEnabled_]]">
         $i18n{createDesktopShortcutLabel}
       </paper-checkbox>
-      <paper-checkbox id="makeSupervisedCheckbox" checked="{{isSupervised_}}">
+      <paper-checkbox id="makeSupervisedCheckbox" checked="{{isSupervised_}}"
+                           hidden="[[isForceSigninEnabled_]]">
         $i18n{manageProfilesSupervisedSignedInLabel}
       </paper-checkbox>
       <div id="supervised-user-container">

[Moe, 2016/12/11 22:11:40]

this div still remains visible even isForceSigninEnabled_ is true. You can put
the checkbox and this div inside a dom-if so that they won't get rendered
altogether.

[zmin, 2016/12/12 20:32:42]

Done.

         <div id="learn-more" >
           <a is="action-link" on-tap="onLearnMoreTap_">$i18n{learnMore}</a>
         </div>
         <template is="dom-if" if="[[isSupervised_]]">
           <template is="dom-if" if="[[isSignedIn_(signedInUsers_)]]">
             <paper-dropdown-menu label="$i18n{selectAnAccount}" no-label-float>
               <paper-listbox class="dropdown-content"
                   selected="{{signedInUserIndex_}}"
                   attr-for-selected="data-user-index">
                 <template is="dom-repeat" items="[[signedInUsers_]]">
@@ skipping 29 matching lines @@
                                         loadingSupervisedUsers_,
                                         profileName_)]]">
           $i18n{createProfileConfirm}
         </paper-button>
       </div>
       <import-supervised-user id="importUserPopup"></import-supervised-user>
     </div>
   </template>
   <script src="create_profile.js"></script>
 </dom-module>