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

chrome/browser/resources/shared/css/tree.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.
  */
 
 tree {
   display: block;
   outline: none;
   overflow: auto;
 }
 
 .tree-item > .tree-row {
   -webkit-user-select: none;
   background-color: rgba(255, 255, 255, 0);
   border: 1px solid rgba(255, 255, 255, 0); /* transparent white */
   border-radius: 2px;
   color: black;
   cursor: default;
-  line-height: 20px;
+  line-height: 28px;
   padding: 0 3px;
   position: relative;
   white-space: nowrap;
 }
 
-@media (pointer:coarse) {
-  .tree-item > .tree-row {
-    line-height: 40px;
-  }
-}
-
 .expand-icon {
   -webkit-transform: rotate(-90deg);
   -webkit-transition: all 150ms;
   background-image: -webkit-canvas(tree-triangle);
   background-position: 50% 50%;
   background-repeat: no-repeat;
   display: inline-block;
   height: 16px;
   opacity: .6;
   position: relative;
-  top: 2px;
+  top: 6px;
   vertical-align: top;
   width: 16px;
 }
 
-@media (pointer:coarse) {
-  .expand-icon {
-    vertical-align: text-top;
-  }
-}
-
 html[dir=rtl] .expand-icon {
   -webkit-transform: rotate(90deg);
 }
 
 .tree-item[expanded] > .tree-row > .expand-icon {
   -webkit-transform: rotate(0);
   background-image: -webkit-canvas(tree-triangle);
   opacity: .5;
 }
 
@@ skipping 122 matching lines @@
 <if expr="not is_macosx">
   outline: none;
 </if>
   padding: 1px 7px 1px 1px;
 }
 
 html[dir=rtl] .tree-item[editing] input {
   margin: -2px -3px -2px -8px;
   padding: 1px 1px 1px 7px;
 }