Update tooltip on user list "Remove" button in People settings

Adds the name of the user to the tooltip shown on the "Remove" button
in the "Restrict sign-in to the following users" list. If a user's name
is available, we use that. Otherwise, we use their displayEmail.

This provides additional context on the tooltip and ensures that
ChromeVox can provide enough context to users

Bug: 825943
Change-Id: I07c77d4a8a70fa76accd23a0738047f06447781c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1913050
Commit-Queue: Bailey Berro <baileyberro@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715143}

chrome/app/settings_strings.grdp

@@ -4366,7 +4366,7 @@
       <ph name="USER_NAME">$1<ex>John Smith</ex></ph> (owner)
     </message>
     <message name="IDS_SETTINGS_USERS_REMOVE_USER_TOOLTIP" desc="Tooltip for the button that removes a user from the list of restricted sign in users.">
-      Remove
+      Remove <ph name="USER_NAME">$1<ex>John Smith</ex></ph>
     </message>
     <message name="IDS_SETTINGS_USERS_ADD_USERS" desc="Label the dialog for adding users.">
       Add user

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

@@ -57,7 +57,7 @@
           </div>
           <cr-icon-button class="icon-clear"
               hidden="[[shouldHideCloseButton_(disabled, item.isOwner)]]"
-              title="$i18n{removeUserTooltip}" on-click="removeUser_">
+              title="[[getRemoveUserTooltip_(item)]]" on-click="removeUser_">
           </cr-icon-button>
         </div>
       </template>

chrome/browser/resources/settings/people_page/user_list.js

@@ -133,4 +133,13 @@ Polymer({
   getTooltip_: function(user) {
     return !this.shouldShowEmail_(user) ? user.displayEmail : '';
   },
+
+  /**
+   * @param {!chrome.usersPrivate.User} user
+   * @return {string}
+   * @private
+   */
+  getRemoveUserTooltip_: function(user) {
+    return this.i18n('removeUserTooltip', user.name);
+  },
 });