ChromeOS OOBE: Update iframe border of EULA screen.

chrome/browser/resources/chromeos/login/oobe_eula.css

 /* Copyright 2016 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. */
 
 a {
   color: var(--google-blue-500);
   text-decoration: none;
 }
 
 #crosEulaFrame,
 #installationSettings,
 #logging {
   font: 13px Roboto, sans-serif;
 }
 
+#crosEulaFrame {
+  border: 1px solid var(--google-blue-500);
+  border-radius: 2px;
+  box-shadow: 0 1px 4px rgba(0, 0, 0, .13);
+}
+
 #installationSettings {
   -webkit-margin-start: 20px;
   margin-top: 31px; /* = 44 - font size */
 }
 
 #logging {
   -webkit-margin-start: 20px;
   color: rgba(0, 0, 0, 0.54);
   margin-bottom: 20px;
   margin-top: 23px; /* = 36 - font size */
 }
 
 #usageStats {
   --paper-checkbox-size: 16px;
-  --paper-checkbox-checked-color: rgb(66, 133, 244); /* #4285f4 */
+  --paper-checkbox-checked-color: var(--google-blue-500);
+  size: 16px;
 }
 
 #usageStatsLabelContainer label {
+  -webkit-margin-start: 16px;
   color: rgba(0, 0, 0, .54);
 }
 
 .bottom-buttons {
   padding: 0 6px; /* = 8px - 2px back button border */
 }
 
 #eula-accept-button {
   -webkit-padding-end: 18px;
 }