ChromeOS OOBE: Fix OK button on Welcome screen.

chrome/browser/resources/chromeos/login/oobe_buttons.html

Index: chrome/browser/resources/chromeos/login/oobe_buttons.html
diff --git a/chrome/browser/resources/chromeos/login/oobe_buttons.html b/chrome/browser/resources/chromeos/login/oobe_buttons.html
index df4e93e19f588ccecab71b932c4adc1aab952f9d..7aa486329223d2f11a1094c220bdbbcb12a76210 100644
--- a/chrome/browser/resources/chromeos/login/oobe_buttons.html
+++ b/chrome/browser/resources/chromeos/login/oobe_buttons.html
@@ -42,6 +42,16 @@
 <dom-module id="oobe-text-button">
   <link rel="stylesheet" href="oobe_text_button.css">
   <template>
+    <style>
+      :root {
+        --paper-button-flat-keyboard-focus: {
+          border-color: rgba(66, 133, 244, 0.4); /* #4284f4 */
+          border-radius: 2px;
+          border-style: solid;
+          border-width: 2px;
+        };
+      }
+    </style>
     <paper-button id="textButton" on-tap="onClick_" disabled="[[disabled]]"
         inverse$="[[inverse]]" aria-label$="[[labelForAria]]">
       <div id="container"