Standardize size of WebUI controls for touch and non-touch.

chrome/browser/resources/bookmark_manager/css/bmm.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. */
 
 html,
 body {
   cursor: default;
   height: 100%;
   margin: 0;
   overflow: hidden;
   width: 100%;
 }
 
 list {
   display: block;
   overflow-x: hidden;
   overflow-y: visible; /* let the container do the scrolling */
 }
 
 list > * {
   -webkit-padding-end: 20px;
   -webkit-padding-start: 3px;
   color: hsl(0, 0%, 70%);
   display: -webkit-box;
+  line-height: 30px;
   padding-bottom: 0;
   padding-top: 0;
   text-decoration: none;
   white-space: nowrap;
 }
 
 list > * > * {
   -webkit-padding-start: 20px;
   background: 0 50% no-repeat;
   box-sizing: border-box;
@@ skipping 280 matching lines @@
 
 html[dir=rtl] .summary button {
   background-position: left center;
 }
 
 @media (pointer:coarse) {
   menu > button {
     line-height: 40px;
   }
 }