ChromeOS OOBE: Implement network selection screen "Back" button.

chrome/browser/resources/chromeos/login/oobe_welcome.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. */
 
 /************* Language Screen **************/
 #languageScreen .language-selection-entry {
   border-top: 1px solid lightgrey;
   height: 44px;
   padding: 0 20px;
 }
 
 #languageScreen .language-selection-entry:last-of-type {
   border-bottom: 1px solid lightgrey;
 }
 
 #languageScreen .language-selection-title {
   color: rgba(0, 0, 0, 0.87);
   font: 13px Roboto, sans-serif;
 }
 
+#languageScreen .bottom-buttons {
+  padding: 0 24px 0 24px;

[michaelpg, 2016/11/14 21:25:19]

use shorthand: 0 24px;

(same for below entries)

[Alexander Alekseev, 2016/11/15 01:23:00]

Done.

+}
+
 /************* Accessibility Screen **************/
 #accessibilityScreen oobe-a11y-option {
   border-top: 1px solid lightgrey;
   min-height: 56px;
 }
 
 #accessibilityScreen oobe-a11y-option:last-of-type {
   border-bottom: 1px solid rgba(0, 0, 0, 0.14);
 }
+
+#accessibilityScreen .bottom-buttons {
+  padding: 0 24px 0 24px;
+}
+
+/************* Accessibility Screen **************/
+#networkSelectionScreen .bottom-buttons {
+  padding: 0 6px 0 6px; /* = 8px - 2px "back buttom border"*/
+}
+

[michaelpg, 2016/11/14 21:25:19]

remove blank lines

[Alexander Alekseev, 2016/11/15 01:23:00]

Done.

+