history: remove focus outline when using touch on mobile.

R=estade@chromium.org
BUG=421816

Review URL: https://codereview.chromium.org/657493003

Cr-Commit-Position: refs/heads/master@{#314337}

chrome/browser/resources/history/history_mobile.css

@@ -4,6 +4,10 @@
 
 /* This file contains styles specific to Android and iOS. */
 
+html:not(.focus-outline-visible) :focus {
+  outline: none;
+}
+
 html {
   height: 100%;
 }

ui/webui/resources/js/cr/ui/focus_outline_manager.js

@@ -58,10 +58,7 @@ cr.define('cr.ui', function() {
      * @type {boolean}
      */
     set visible(visible) {
-      if (visible)
-        this.classList_.add(CLASS_NAME);
-      else
-        this.classList_.remove(CLASS_NAME);
+      this.classList_.toggle(CLASS_NAME, visible);
     },
     get visible() {
       return this.classList_.contains(CLASS_NAME);