[MD Settings][People] Disables profile name field for legacy supervised users.

chrome/test/data/webui/settings/people_page_manage_profile_test.js

Index: chrome/test/data/webui/settings/people_page_manage_profile_test.js
diff --git a/chrome/test/data/webui/settings/people_page_manage_profile_test.js b/chrome/test/data/webui/settings/people_page_manage_profile_test.js
index 6d9fd3e2310ba13527820a26915d8a14f9930b1a..0c63889f5d0ab7660b8547018971f2916d97ee2f 100644
--- a/chrome/test/data/webui/settings/people_page_manage_profile_test.js
+++ b/chrome/test/data/webui/settings/people_page_manage_profile_test.js
@@ -43,6 +43,7 @@ cr.define('settings_people_page_manage_profile', function() {
         manageProfile = document.createElement('settings-manage-profile');
         manageProfile.profileIconUrl = 'fake-icon-1.png';
         manageProfile.profileName = 'Initial Fake Name';
+        manageProfile.syncStatus = {supervisedUser: false, childUser: false};
         document.body.appendChild(manageProfile);
       });
 
@@ -93,6 +94,7 @@ cr.define('settings_people_page_manage_profile', function() {
       test('ManageProfileChangeName', function() {
         var nameField = manageProfile.$.name;
         assertTrue(!!nameField);
+        assertFalse(!!nameField.disabled);
 
         assertEquals('Initial Fake Name', nameField.value);
 
@@ -106,6 +108,16 @@ cr.define('settings_people_page_manage_profile', function() {
             });
       });
 
+      test('ProfileNameIsDisabledForSupervisedUser', function() {
+        manageProfile.syncStatus = {supervisedUser: true, childUser: false};
+
+        var nameField = manageProfile.$.name;
+        assertTrue(!!nameField);
+
+        // Name field should be disabled for legacy supervised users.
+        assertTrue(!!nameField.disabled);
+      });
+
       // Tests profile name updates pushed from the browser.
       test('ManageProfileNameUpdated', function() {
         var nameField = manageProfile.$.name;