Show warning message when trying to create SU with existing name

chrome/browser/resources/options/manage_profile_overlay.js

Index: chrome/browser/resources/options/manage_profile_overlay.js
diff --git a/chrome/browser/resources/options/manage_profile_overlay.js b/chrome/browser/resources/options/manage_profile_overlay.js
index df9862b545f1c027297dbf3f5fed425fdef660cf..a96a2713bc32b8a20dec2fac09c5c8ca988f5ba8 100644
--- a/chrome/browser/resources/options/manage_profile_overlay.js
+++ b/chrome/browser/resources/options/manage_profile_overlay.js
@@ -379,22 +379,31 @@ cr.define('options', function() {
       var newName = $('create-profile-name').value;
       var i;
       for (i = 0; i < supervisedUsers.length; ++i) {
-        if (supervisedUsers[i].name == newName &&
-            !supervisedUsers[i].onCurrentDevice) {
-          var errorHtml = loadTimeData.getStringF(
-              'manageProfilesExistingSupervisedUser',
-              HTMLEscape(elide(newName, /* maxLength */ 50)));
-          this.showErrorBubble_(errorHtml, 'create', true);
-
+        if (supervisedUsers[i].name == newName) {
           // Check if another supervised user also exists with that name.
           var nameIsUnique = true;
+          // Handling the case when multiple SU user with the same

[Pam (message me for reviews), 2015/12/15 22:20:13]

nit:
user with the same name are created
->
users with the same name exist

Also, please add a note about how this can happen; e.g.:
A bug allowed duplicate SU names for a time, so we need to handle this case.

[atanasova, 2015/12/16 09:21:13]

Done.

+          // name are created, but not all of them are on the device.
+          // If at least one is not imported, we want to offer that
+          // option to the user.
+          var allOnCurrentDevice = supervisedUsers[i].onCurrentDevice;
           var j;
           for (j = i + 1; j < supervisedUsers.length; ++j) {
             if (supervisedUsers[j].name == newName) {
               nameIsUnique = false;
-              break;
+              allOnCurrentDevice = allOnCurrentDevice &&
+                 supervisedUsers[j].onCurrentDevice;
             }
           }
+
+          var errorHtml = allOnCurrentDevice ?
+              loadTimeData.getStringF(
+                  'managedProfilesExistingLocalSupervisedUser') :
+              loadTimeData.getStringF(
+                  'manageProfilesExistingSupervisedUser',
+                  HTMLEscape(elide(newName, /* maxLength */ 50)));
+          this.showErrorBubble_(errorHtml, 'create', true);
+
           $('supervised-user-import-existing').onclick =
               this.getImportHandler_(supervisedUsers[i], nameIsUnique);
           $('create-profile-ok').disabled = true;