history: make focus outline look good on all platforms.

chrome/browser/resources/history/history.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[dir='rtl'] body.uber-frame > .page {
   -webkit-margin-end: 0;
 }
 
 body.uber-frame > .page.big-topbar-page {
   padding-top: 78px;
@@ skipping 236 matching lines @@
 .entry-box,
 .site-domain-row {
   -webkit-align-items: center;
   cursor: default;
   display: -webkit-flex;
   /* An odd line-height ensures a consistent baseline on all platforms. */
   line-height: 1.75em;
   margin-bottom: 6px;
   /* The box should be no bigger than its parent. */
   max-width: 100%;
+  min-height: 2em;
   overflow: hidden;
   padding-bottom: 1px;
 }
 
 .site-domain-wrapper {
   cursor: pointer;
   display: -webkit-flex;
   width: 100%;
 }
 
@@ skipping 235 matching lines @@
 }
 
 .entry .starred {
   visibility: visible;
 }
 
 .entry .title > a {
   color: rgb(48, 57, 66);
   margin: 2px;
   padding: 2px;
+<if expr="is_mac">

[Evan Stade, 2014/09/10 18:38:35]

nit: add a comment abuot why the if exprs are necessary

[Dan Beam, 2014/09/10 19:02:08]

Done.

+  margin: 4px;
+  padding: 0;
+</if>
+<if expr="is_win">
+  padding: 0 2px;
+</if>
   text-decoration: none;
 }
 
 .entry .title > a.to-be-removed {
   text-decoration: line-through;
 }
 
 .entry .title > a:hover {
   text-decoration: underline;
 }
@@ skipping 91 matching lines @@
   background-image: url(../../../../ui/webui/resources/images/phone_small.png);
   background-position: 14px center;
   padding-left: 43px;
 }
 
 #action-menu[data-devicetype='tablet']::before {
   background-image: url(../../../../ui/webui/resources/images/tablet_small.png);
   background-position: 17px center;
   padding-left: 49px;
 }