Switch to using '-t ios' for grit

ui/webui/resources/css/widgets.css

 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file. */
 
 /* This file defines styles for form controls. The order of rule blocks is
  * important as there are some rules with equal specificity that rely on order
  * as a tiebreaker. These are marked with OVERRIDE. */
 
 /* Default state **************************************************************/
 
@@ skipping 80 matching lines @@
 textarea {
   border: 1px solid #bfbfbf;
   border-radius: 2px;
   box-sizing: border-box;
   color: #444;
   font: inherit;
   margin: 0;
   /* Use min-height to accommodate addditional padding for touch as needed. */
   min-height: 2em;
   padding: 3px;
-<if expr="is_win or is_macosx">
+<if expr="is_win or is_macosx or is_ios">
   /* For better alignment between adjacent buttons and inputs. */
   padding-bottom: 4px;
 </if>
 }
 
 input[type='search'] {
   -webkit-appearance: textfield;
   /* NOTE: Keep a relatively high min-width for this so we don't obscure the end
    * of the default text in relatively spacious languages (i.e. German). */
   min-width: 160px;
@@ skipping 186 matching lines @@
   display: block;
 }
 
 :-webkit-any(.checkbox, .radio) label:hover {
   color: black;
 }
 
 label > input:disabled:-webkit-any([type='checkbox'], [type='radio']) ~ span {
   color: #999;
 }